./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i --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/goblint-regression/28-race_reach_77-tricky_address4_racing.i -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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --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 21:59:39,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:59:39,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:59:39,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:59:39,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:59:39,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:59:39,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:59:39,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:59:39,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:59:39,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:59:39,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:59:39,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:59:39,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:59:39,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:59:39,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:59:39,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:59:39,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:59:39,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:59:39,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:59:39,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:59:39,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:59:39,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:59:39,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:59:39,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:59:39,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:59:39,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:59:39,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:59:39,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:59:39,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:59:39,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:59:39,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:59:39,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:59:39,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:59:39,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:59:39,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:59:39,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:59:39,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:59:39,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:59:39,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:59:39,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:59:39,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:59:39,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:59:39,401 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:59:39,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:59:39,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:59:39,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:59:39,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:59:39,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:59:39,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:59:39,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:59:39,407 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:59:39,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:59:39,408 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:59:39,408 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:59:39,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:59:39,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:59:39,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:59:39,409 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:59:39,409 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:59:39,409 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:59:39,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:59:39,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:59:39,410 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:59:39,410 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:59:39,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:59:39,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:59:39,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:59:39,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:59:39,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:59:39,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:59:39,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:59:39,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:59:39,412 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:59:39,412 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:59:39,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:59:39,412 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:59:39,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:59:39,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:59:39,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:59:39,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:59:39,747 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:59:39,748 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:59:39,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-29 21:59:40,919 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:59:41,235 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:59:41,236 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-29 21:59:41,247 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7908207c8/f35ba8a08cc347d481ee28a741534065/FLAG8294e4232 [2023-08-29 21:59:41,262 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7908207c8/f35ba8a08cc347d481ee28a741534065 [2023-08-29 21:59:41,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:59:41,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:59:41,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:59:41,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:59:41,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:59:41,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:41,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409309ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41, skipping insertion in model container [2023-08-29 21:59:41,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:41,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:59:41,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:59:41,791 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-08-29 21:59:41,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:59:41,865 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:59:41,899 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-08-29 21:59:41,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:59:41,999 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:59:42,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41 WrapperNode [2023-08-29 21:59:42,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:59:42,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:59:42,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:59:42,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:59:42,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,081 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-08-29 21:59:42,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:59:42,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:59:42,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:59:42,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:59:42,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,137 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:59:42,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:59:42,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:59:42,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:59:42,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (1/1) ... [2023-08-29 21:59:42,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:59:42,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:59:42,190 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 21:59:42,216 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 21:59:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:59:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:59:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:59:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:59:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:59:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:59:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:59:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:59:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:59:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:59:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:59:42,233 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 21:59:42,413 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:59:42,414 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:59:42,709 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:59:42,717 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:59:42,717 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-29 21:59:42,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:59:42 BoogieIcfgContainer [2023-08-29 21:59:42,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:59:42,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:59:42,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:59:42,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:59:42,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:59:41" (1/3) ... [2023-08-29 21:59:42,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2125f1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:59:42, skipping insertion in model container [2023-08-29 21:59:42,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:59:41" (2/3) ... [2023-08-29 21:59:42,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2125f1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:59:42, skipping insertion in model container [2023-08-29 21:59:42,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:59:42" (3/3) ... [2023-08-29 21:59:42,726 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-08-29 21:59:42,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:59:42,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-08-29 21:59:42,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:59:42,842 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:59:42,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 221 transitions, 450 flow [2023-08-29 21:59:42,970 INFO L130 PetriNetUnfolder]: 45/308 cut-off events. [2023-08-29 21:59:42,971 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-29 21:59:42,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 308 events. 45/308 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1153 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-08-29 21:59:42,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 221 transitions, 450 flow [2023-08-29 21:59:42,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 221 transitions, 450 flow [2023-08-29 21:59:42,998 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:59:43,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 221 transitions, 450 flow [2023-08-29 21:59:43,021 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 221 transitions, 450 flow [2023-08-29 21:59:43,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 221 transitions, 450 flow [2023-08-29 21:59:43,094 INFO L130 PetriNetUnfolder]: 45/308 cut-off events. [2023-08-29 21:59:43,094 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-29 21:59:43,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 308 events. 45/308 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1153 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-08-29 21:59:43,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 15066 [2023-08-29 21:59:47,014 INFO L134 LiptonReduction]: Checked pairs total: 31006 [2023-08-29 21:59:47,014 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-29 21:59:47,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:59:47,050 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;@67755ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:59:47,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-29 21:59:47,055 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-29 21:59:47,056 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:59:47,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:47,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:59:47,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:47,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash 886390, now seen corresponding path program 1 times [2023-08-29 21:59:47,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:47,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51246587] [2023-08-29 21:59:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:47,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:59:47,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51246587] [2023-08-29 21:59:47,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51246587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:59:47,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:59:47,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:59:47,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804336928] [2023-08-29 21:59:47,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:59:47,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:59:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:59:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:59:47,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 439 [2023-08-29 21:59:47,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 21:59:47,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:47,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 439 [2023-08-29 21:59:47,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:47,557 INFO L130 PetriNetUnfolder]: 612/1375 cut-off events. [2023-08-29 21:59:47,558 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:59:47,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2585 conditions, 1375 events. 612/1375 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9082 event pairs, 560 based on Foata normal form. 102/974 useless extension candidates. Maximal degree in co-relation 2502. Up to 1202 conditions per place. [2023-08-29 21:59:47,566 INFO L137 encePairwiseOnDemand]: 409/439 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-29 21:59:47,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 252 flow [2023-08-29 21:59:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:59:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:59:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-29 21:59:47,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.486712224753227 [2023-08-29 21:59:47,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-29 21:59:47,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-29 21:59:47,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:47,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-29 21:59:47,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states 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 21:59:47,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 21:59:47,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 21:59:47,602 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 641 transitions. [2023-08-29 21:59:47,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 252 flow [2023-08-29 21:59:47,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:59:47,608 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 152 flow [2023-08-29 21:59:47,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-29 21:59:47,617 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-29 21:59:47,618 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 152 flow [2023-08-29 21:59:47,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 21:59:47,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:47,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:59:47,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:59:47,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:47,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:47,619 INFO L85 PathProgramCache]: Analyzing trace with hash 27468609, now seen corresponding path program 1 times [2023-08-29 21:59:47,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:47,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66641909] [2023-08-29 21:59:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:47,745 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 21:59:47,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:47,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66641909] [2023-08-29 21:59:47,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66641909] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:59:47,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911109450] [2023-08-29 21:59:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:47,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:47,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:59:47,750 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 21:59:47,756 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 21:59:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:47,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:59:47,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:59:47,891 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 21:59:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:59:47,918 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 21:59:47,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911109450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:59:47,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:59:47,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:59:47,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769480525] [2023-08-29 21:59:47,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:59:47,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:59:47,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:47,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:59:47,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:59:47,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 439 [2023-08-29 21:59:47,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 186.28571428571428) internal successors, (1304), 7 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states 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 21:59:47,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:47,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 439 [2023-08-29 21:59:47,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:48,212 INFO L130 PetriNetUnfolder]: 612/1378 cut-off events. [2023-08-29 21:59:48,212 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:59:48,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2601 conditions, 1378 events. 612/1378 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9058 event pairs, 560 based on Foata normal form. 0/875 useless extension candidates. Maximal degree in co-relation 2589. Up to 1202 conditions per place. [2023-08-29 21:59:48,219 INFO L137 encePairwiseOnDemand]: 436/439 looper letters, 53 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-08-29 21:59:48,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 280 flow [2023-08-29 21:59:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:59:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:59:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1171 transitions. [2023-08-29 21:59:48,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445709946848899 [2023-08-29 21:59:48,223 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1171 transitions. [2023-08-29 21:59:48,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1171 transitions. [2023-08-29 21:59:48,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:48,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1171 transitions. [2023-08-29 21:59:48,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.16666666666666) internal successors, (1171), 6 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states 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 21:59:48,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 439.0) internal successors, (3073), 7 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states 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 21:59:48,233 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 439.0) internal successors, (3073), 7 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states 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 21:59:48,233 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 152 flow. Second operand 6 states and 1171 transitions. [2023-08-29 21:59:48,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 280 flow [2023-08-29 21:59:48,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 276 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:59:48,238 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 184 flow [2023-08-29 21:59:48,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-08-29 21:59:48,239 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-08-29 21:59:48,239 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 184 flow [2023-08-29 21:59:48,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 186.28571428571428) internal successors, (1304), 7 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states 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 21:59:48,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:48,240 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-29 21:59:48,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 21:59:48,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:48,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:48,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:48,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2030775884, now seen corresponding path program 2 times [2023-08-29 21:59:48,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:48,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28129309] [2023-08-29 21:59:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:48,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:48,551 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 21:59:48,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:48,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28129309] [2023-08-29 21:59:48,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28129309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:59:48,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124632826] [2023-08-29 21:59:48,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:59:48,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:48,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:59:48,554 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 21:59:48,576 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 21:59:48,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 21:59:48,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:59:48,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 21:59:48,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:59:48,661 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 21:59:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:59:48,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:59:48,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124632826] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:59:48,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:59:48,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-29 21:59:48,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286086967] [2023-08-29 21:59:48,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:59:48,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:59:48,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:48,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:59:48,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:59:48,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 439 [2023-08-29 21:59:48,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 21:59:48,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:48,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 439 [2023-08-29 21:59:48,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:48,931 INFO L130 PetriNetUnfolder]: 583/1317 cut-off events. [2023-08-29 21:59:48,931 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:59:48,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 1317 events. 583/1317 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9310 event pairs, 0 based on Foata normal form. 0/852 useless extension candidates. Maximal degree in co-relation 2518. Up to 1162 conditions per place. [2023-08-29 21:59:48,937 INFO L137 encePairwiseOnDemand]: 435/439 looper letters, 78 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-29 21:59:48,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 388 flow [2023-08-29 21:59:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:59:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:59:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-29 21:59:48,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806378132118451 [2023-08-29 21:59:48,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-29 21:59:48,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-29 21:59:48,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:48,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-29 21:59:48,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states 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 21:59:48,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 21:59:48,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 21:59:48,945 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 184 flow. Second operand 3 states and 633 transitions. [2023-08-29 21:59:48,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 388 flow [2023-08-29 21:59:48,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 374 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 21:59:48,949 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 180 flow [2023-08-29 21:59:48,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2023-08-29 21:59:48,950 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2023-08-29 21:59:48,950 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 180 flow [2023-08-29 21:59:48,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 21:59:48,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:48,951 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-29 21:59:48,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:59:49,158 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,SelfDestructingSolverStorable2 [2023-08-29 21:59:49,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:49,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:49,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2030775882, now seen corresponding path program 1 times [2023-08-29 21:59:49,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:49,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095984663] [2023-08-29 21:59:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:49,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:59:49,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:49,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095984663] [2023-08-29 21:59:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095984663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:59:49,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:59:49,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:59:49,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547017552] [2023-08-29 21:59:49,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:59:49,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:59:49,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:59:49,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:59:49,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 439 [2023-08-29 21:59:49,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 21:59:49,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:49,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 439 [2023-08-29 21:59:49,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:49,447 INFO L130 PetriNetUnfolder]: 565/1243 cut-off events. [2023-08-29 21:59:49,447 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-29 21:59:49,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2455 conditions, 1243 events. 565/1243 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8164 event pairs, 480 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 2426. Up to 1011 conditions per place. [2023-08-29 21:59:49,453 INFO L137 encePairwiseOnDemand]: 434/439 looper letters, 73 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-29 21:59:49,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 88 transitions, 368 flow [2023-08-29 21:59:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:59:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:59:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-29 21:59:49,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47076689445709946 [2023-08-29 21:59:49,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-29 21:59:49,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-29 21:59:49,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:49,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-29 21:59:49,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states 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 21:59:49,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 21:59:49,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 21:59:49,461 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 180 flow. Second operand 3 states and 620 transitions. [2023-08-29 21:59:49,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 88 transitions, 368 flow [2023-08-29 21:59:49,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:59:49,467 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 178 flow [2023-08-29 21:59:49,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2023-08-29 21:59:49,468 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-08-29 21:59:49,468 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 178 flow [2023-08-29 21:59:49,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 21:59:49,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:49,469 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:59:49,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:59:49,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:49,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash 65649342, now seen corresponding path program 1 times [2023-08-29 21:59:49,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:49,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594112174] [2023-08-29 21:59:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:49,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:59:49,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:49,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594112174] [2023-08-29 21:59:49,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594112174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:59:49,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377040246] [2023-08-29 21:59:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:49,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:49,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:59:49,570 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 21:59:49,596 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 21:59:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:49,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:59:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:59:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:59:49,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:59:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:59:49,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377040246] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:59:49,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:59:49,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 21:59:49,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058926715] [2023-08-29 21:59:49,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:59:49,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:59:49,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:49,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:59:49,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:59:49,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 439 [2023-08-29 21:59:49,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 186.3846153846154) internal successors, (2423), 13 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states 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 21:59:49,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:49,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 439 [2023-08-29 21:59:49,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:50,002 INFO L130 PetriNetUnfolder]: 567/1251 cut-off events. [2023-08-29 21:59:50,002 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-29 21:59:50,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 1251 events. 567/1251 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8176 event pairs, 520 based on Foata normal form. 6/865 useless extension candidates. Maximal degree in co-relation 2451. Up to 1098 conditions per place. [2023-08-29 21:59:50,012 INFO L137 encePairwiseOnDemand]: 436/439 looper letters, 51 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-08-29 21:59:50,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 338 flow [2023-08-29 21:59:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:59:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:59:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2288 transitions. [2023-08-29 21:59:50,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43432042520880787 [2023-08-29 21:59:50,018 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2288 transitions. [2023-08-29 21:59:50,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2288 transitions. [2023-08-29 21:59:50,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:50,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2288 transitions. [2023-08-29 21:59:50,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 21:59:50,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 439.0) internal successors, (5707), 13 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states 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 21:59:50,034 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 439.0) internal successors, (5707), 13 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states 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 21:59:50,034 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 178 flow. Second operand 12 states and 2288 transitions. [2023-08-29 21:59:50,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 338 flow [2023-08-29 21:59:50,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 74 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:59:50,037 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 256 flow [2023-08-29 21:59:50,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=256, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2023-08-29 21:59:50,038 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2023-08-29 21:59:50,038 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 256 flow [2023-08-29 21:59:50,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 186.3846153846154) internal successors, (2423), 13 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states 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 21:59:50,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:50,039 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-29 21:59:50,049 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 21:59:50,245 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 21:59:50,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:50,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:50,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1440573918, now seen corresponding path program 2 times [2023-08-29 21:59:50,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:50,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045798435] [2023-08-29 21:59:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:50,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:59:50,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:50,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045798435] [2023-08-29 21:59:50,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045798435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:59:50,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677107977] [2023-08-29 21:59:50,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:59:50,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:50,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:59:50,401 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 21:59:50,409 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 21:59:50,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:59:50,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:59:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 21:59:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:59:50,498 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 21:59:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:59:50,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:59:50,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677107977] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:59:50,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:59:50,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-29 21:59:50,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707865402] [2023-08-29 21:59:50,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:59:50,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:59:50,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:50,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:59:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:59:50,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 439 [2023-08-29 21:59:50,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 21:59:50,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:50,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 439 [2023-08-29 21:59:50,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:50,834 INFO L130 PetriNetUnfolder]: 523/1198 cut-off events. [2023-08-29 21:59:50,834 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2023-08-29 21:59:50,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 1198 events. 523/1198 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8271 event pairs, 0 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 2316. Up to 947 conditions per place. [2023-08-29 21:59:50,847 INFO L137 encePairwiseOnDemand]: 434/439 looper letters, 98 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-08-29 21:59:50,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 538 flow [2023-08-29 21:59:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:59:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:59:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 829 transitions. [2023-08-29 21:59:50,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47209567198177677 [2023-08-29 21:59:50,850 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 829 transitions. [2023-08-29 21:59:50,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 829 transitions. [2023-08-29 21:59:50,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:50,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 829 transitions. [2023-08-29 21:59:50,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 21:59:50,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 439.0) internal successors, (2195), 5 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states 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 21:59:50,855 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 439.0) internal successors, (2195), 5 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states 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 21:59:50,855 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 256 flow. Second operand 4 states and 829 transitions. [2023-08-29 21:59:50,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 538 flow [2023-08-29 21:59:50,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 114 transitions, 490 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-29 21:59:50,858 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 212 flow [2023-08-29 21:59:50,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2023-08-29 21:59:50,859 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2023-08-29 21:59:50,859 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 212 flow [2023-08-29 21:59:50,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 21:59:50,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:50,860 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:59:50,867 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 21:59:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:51,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:51,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1708153163, now seen corresponding path program 1 times [2023-08-29 21:59:51,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:51,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539604406] [2023-08-29 21:59:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:59:51,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:51,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539604406] [2023-08-29 21:59:51,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539604406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:59:51,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:59:51,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:59:51,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913055888] [2023-08-29 21:59:51,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:59:51,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:59:51,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:59:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:59:51,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 439 [2023-08-29 21:59:51,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 21:59:51,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:51,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 439 [2023-08-29 21:59:51,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:51,994 INFO L130 PetriNetUnfolder]: 309/739 cut-off events. [2023-08-29 21:59:51,994 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-08-29 21:59:51,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483 conditions, 739 events. 309/739 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4369 event pairs, 0 based on Foata normal form. 69/700 useless extension candidates. Maximal degree in co-relation 1430. Up to 537 conditions per place. [2023-08-29 21:59:51,997 INFO L137 encePairwiseOnDemand]: 423/439 looper letters, 78 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-29 21:59:51,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 97 transitions, 441 flow [2023-08-29 21:59:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:59:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:59:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1094 transitions. [2023-08-29 21:59:52,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153378891419894 [2023-08-29 21:59:52,001 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1094 transitions. [2023-08-29 21:59:52,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1094 transitions. [2023-08-29 21:59:52,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:52,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1094 transitions. [2023-08-29 21:59:52,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.33333333333334) internal successors, (1094), 6 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states 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 21:59:52,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 439.0) internal successors, (3073), 7 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states 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 21:59:52,009 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 439.0) internal successors, (3073), 7 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states 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 21:59:52,009 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 212 flow. Second operand 6 states and 1094 transitions. [2023-08-29 21:59:52,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 97 transitions, 441 flow [2023-08-29 21:59:52,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 427 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:59:52,012 INFO L231 Difference]: Finished difference. Result has 78 places, 65 transitions, 204 flow [2023-08-29 21:59:52,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2023-08-29 21:59:52,013 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2023-08-29 21:59:52,013 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 204 flow [2023-08-29 21:59:52,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 21:59:52,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:52,014 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:59:52,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:59:52,014 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:52,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:52,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1413135550, now seen corresponding path program 1 times [2023-08-29 21:59:52,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:52,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932382947] [2023-08-29 21:59:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:52,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:59:52,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:52,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932382947] [2023-08-29 21:59:52,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932382947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:59:52,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:59:52,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:59:52,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958738146] [2023-08-29 21:59:52,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:59:52,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:59:52,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:59:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:59:52,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 439 [2023-08-29 21:59:52,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 21:59:52,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:52,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 439 [2023-08-29 21:59:52,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:52,787 INFO L130 PetriNetUnfolder]: 341/809 cut-off events. [2023-08-29 21:59:52,787 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-29 21:59:52,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 809 events. 341/809 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4706 event pairs, 94 based on Foata normal form. 0/693 useless extension candidates. Maximal degree in co-relation 1625. Up to 463 conditions per place. [2023-08-29 21:59:52,791 INFO L137 encePairwiseOnDemand]: 432/439 looper letters, 87 selfloop transitions, 10 changer transitions 3/111 dead transitions. [2023-08-29 21:59:52,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 111 transitions, 517 flow [2023-08-29 21:59:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:59:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:59:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1149 transitions. [2023-08-29 21:59:52,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43621867881548976 [2023-08-29 21:59:52,797 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1149 transitions. [2023-08-29 21:59:52,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1149 transitions. [2023-08-29 21:59:52,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:52,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1149 transitions. [2023-08-29 21:59:52,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.5) internal successors, (1149), 6 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 21:59:52,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 439.0) internal successors, (3073), 7 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states 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 21:59:52,805 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 439.0) internal successors, (3073), 7 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states 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 21:59:52,805 INFO L175 Difference]: Start difference. First operand has 78 places, 65 transitions, 204 flow. Second operand 6 states and 1149 transitions. [2023-08-29 21:59:52,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 111 transitions, 517 flow [2023-08-29 21:59:52,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 111 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:59:52,808 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 261 flow [2023-08-29 21:59:52,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2023-08-29 21:59:52,811 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2023-08-29 21:59:52,811 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 261 flow [2023-08-29 21:59:52,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 21:59:52,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:52,812 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:59:52,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:59:52,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:52,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1412100346, now seen corresponding path program 1 times [2023-08-29 21:59:52,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:52,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979860774] [2023-08-29 21:59:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:59:52,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:52,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979860774] [2023-08-29 21:59:52,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979860774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:59:52,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953896009] [2023-08-29 21:59:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:52,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:52,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:59:52,877 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 21:59:52,903 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 21:59:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:59:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:59:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:59:52,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:59:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:59:52,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953896009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:59:52,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:59:52,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 21:59:52,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162013515] [2023-08-29 21:59:52,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:59:52,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:59:52,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:59:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:59:53,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 439 [2023-08-29 21:59:53,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 261 flow. Second operand has 7 states, 7 states have (on average 187.57142857142858) internal successors, (1313), 7 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 21:59:53,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:53,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 439 [2023-08-29 21:59:53,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:53,053 INFO L130 PetriNetUnfolder]: 22/91 cut-off events. [2023-08-29 21:59:53,053 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-08-29 21:59:53,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 91 events. 22/91 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 256 event pairs, 0 based on Foata normal form. 14/101 useless extension candidates. Maximal degree in co-relation 210. Up to 48 conditions per place. [2023-08-29 21:59:53,054 INFO L137 encePairwiseOnDemand]: 436/439 looper letters, 22 selfloop transitions, 2 changer transitions 25/51 dead transitions. [2023-08-29 21:59:53,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 287 flow [2023-08-29 21:59:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:59:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:59:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 773 transitions. [2023-08-29 21:59:53,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4402050113895216 [2023-08-29 21:59:53,056 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 773 transitions. [2023-08-29 21:59:53,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 773 transitions. [2023-08-29 21:59:53,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:53,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 773 transitions. [2023-08-29 21:59:53,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:59:53,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 439.0) internal successors, (2195), 5 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states 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 21:59:53,061 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 439.0) internal successors, (2195), 5 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states 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 21:59:53,061 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 261 flow. Second operand 4 states and 773 transitions. [2023-08-29 21:59:53,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 287 flow [2023-08-29 21:59:53,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 272 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 21:59:53,063 INFO L231 Difference]: Finished difference. Result has 56 places, 24 transitions, 121 flow [2023-08-29 21:59:53,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=56, PETRI_TRANSITIONS=24} [2023-08-29 21:59:53,064 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -15 predicate places. [2023-08-29 21:59:53,064 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 24 transitions, 121 flow [2023-08-29 21:59:53,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 187.57142857142858) internal successors, (1313), 7 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 21:59:53,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:53,065 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:59:53,072 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 21:59:53,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:53,270 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:59:53,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash 820615307, now seen corresponding path program 1 times [2023-08-29 21:59:53,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:53,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423475427] [2023-08-29 21:59:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:53,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:59:53,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:53,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423475427] [2023-08-29 21:59:53,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423475427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:59:53,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663977983] [2023-08-29 21:59:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:53,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:59:53,641 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 21:59:53,665 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 21:59:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 21:59:53,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:59:53,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 21:59:53,814 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 21:59:53,814 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 21:59:53,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 21:59:53,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 21:59:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:59:53,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:59:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663977983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:59:53,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:59:53,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-29 21:59:53,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720356431] [2023-08-29 21:59:53,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:59:53,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:59:53,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:53,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:59:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:59:54,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 439 [2023-08-29 21:59:54,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 24 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 21:59:54,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:54,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 439 [2023-08-29 21:59:54,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:54,182 INFO L130 PetriNetUnfolder]: 5/32 cut-off events. [2023-08-29 21:59:54,183 INFO L131 PetriNetUnfolder]: For 64/65 co-relation queries the response was YES. [2023-08-29 21:59:54,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 32 events. 5/32 cut-off events. For 64/65 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 35 event pairs, 1 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 70. Up to 12 conditions per place. [2023-08-29 21:59:54,183 INFO L137 encePairwiseOnDemand]: 435/439 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2023-08-29 21:59:54,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 24 transitions, 165 flow [2023-08-29 21:59:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:59:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:59:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 811 transitions. [2023-08-29 21:59:54,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694760820045558 [2023-08-29 21:59:54,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 811 transitions. [2023-08-29 21:59:54,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 811 transitions. [2023-08-29 21:59:54,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:54,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 811 transitions. [2023-08-29 21:59:54,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.2) internal successors, (811), 5 states have internal predecessors, (811), 0 states have call successors, (0), 0 states 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 21:59:54,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 439.0) internal successors, (2634), 6 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states 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 21:59:54,192 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 439.0) internal successors, (2634), 6 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states 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 21:59:54,192 INFO L175 Difference]: Start difference. First operand has 56 places, 24 transitions, 121 flow. Second operand 5 states and 811 transitions. [2023-08-29 21:59:54,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 24 transitions, 165 flow [2023-08-29 21:59:54,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 24 transitions, 159 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:59:54,194 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-29 21:59:54,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-29 21:59:54,194 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -28 predicate places. [2023-08-29 21:59:54,195 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-29 21:59:54,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 21:59:54,197 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 38 remaining) [2023-08-29 21:59:54,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 38 remaining) [2023-08-29 21:59:54,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 38 remaining) [2023-08-29 21:59:54,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 38 remaining) [2023-08-29 21:59:54,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 38 remaining) [2023-08-29 21:59:54,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 38 remaining) [2023-08-29 21:59:54,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 38 remaining) [2023-08-29 21:59:54,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (30 of 38 remaining) [2023-08-29 21:59:54,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 38 remaining) [2023-08-29 21:59:54,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 38 remaining) [2023-08-29 21:59:54,200 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 38 remaining) [2023-08-29 21:59:54,200 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 38 remaining) [2023-08-29 21:59:54,200 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 38 remaining) [2023-08-29 21:59:54,200 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 38 remaining) [2023-08-29 21:59:54,200 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 38 remaining) [2023-08-29 21:59:54,200 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 38 remaining) [2023-08-29 21:59:54,200 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 38 remaining) [2023-08-29 21:59:54,201 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 38 remaining) [2023-08-29 21:59:54,201 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 38 remaining) [2023-08-29 21:59:54,201 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 38 remaining) [2023-08-29 21:59:54,201 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 38 remaining) [2023-08-29 21:59:54,201 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 38 remaining) [2023-08-29 21:59:54,201 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 38 remaining) [2023-08-29 21:59:54,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 38 remaining) [2023-08-29 21:59:54,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 38 remaining) [2023-08-29 21:59:54,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 38 remaining) [2023-08-29 21:59:54,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 38 remaining) [2023-08-29 21:59:54,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 38 remaining) [2023-08-29 21:59:54,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 38 remaining) [2023-08-29 21:59:54,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 38 remaining) [2023-08-29 21:59:54,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (7 of 38 remaining) [2023-08-29 21:59:54,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 38 remaining) [2023-08-29 21:59:54,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 38 remaining) [2023-08-29 21:59:54,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 38 remaining) [2023-08-29 21:59:54,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (3 of 38 remaining) [2023-08-29 21:59:54,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 38 remaining) [2023-08-29 21:59:54,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 38 remaining) [2023-08-29 21:59:54,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 38 remaining) [2023-08-29 21:59:54,212 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 21:59:54,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:54,410 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:59:54,412 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:59:54,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 221 transitions, 450 flow [2023-08-29 21:59:54,441 INFO L130 PetriNetUnfolder]: 45/308 cut-off events. [2023-08-29 21:59:54,441 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-29 21:59:54,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 308 events. 45/308 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1153 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-08-29 21:59:54,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 221 transitions, 450 flow [2023-08-29 21:59:54,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 216 transitions, 437 flow [2023-08-29 21:59:54,445 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:59:54,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 216 transitions, 437 flow [2023-08-29 21:59:54,446 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 216 transitions, 437 flow [2023-08-29 21:59:54,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 216 transitions, 437 flow [2023-08-29 21:59:54,467 INFO L130 PetriNetUnfolder]: 44/303 cut-off events. [2023-08-29 21:59:54,467 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:59:54,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 303 events. 44/303 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1116 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-08-29 21:59:54,474 INFO L119 LiptonReduction]: Number of co-enabled transitions 15066 [2023-08-29 21:59:57,779 INFO L134 LiptonReduction]: Checked pairs total: 30005 [2023-08-29 21:59:57,779 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-29 21:59:57,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:59:57,780 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;@67755ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:59:57,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:59:57,783 INFO L130 PetriNetUnfolder]: 7/44 cut-off events. [2023-08-29 21:59:57,783 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:59:57,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:57,784 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-29 21:59:57,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:59:57,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash -386922954, now seen corresponding path program 1 times [2023-08-29 21:59:57,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:57,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396446922] [2023-08-29 21:59:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:57,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:59:57,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:57,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396446922] [2023-08-29 21:59:57,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396446922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:59:57,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:59:57,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:59:57,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483564636] [2023-08-29 21:59:57,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:59:57,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:59:57,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:59:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:59:57,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 435 [2023-08-29 21:59:57,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 91 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states 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 21:59:57,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:57,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 435 [2023-08-29 21:59:57,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:57,949 INFO L130 PetriNetUnfolder]: 569/1283 cut-off events. [2023-08-29 21:59:57,950 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:59:57,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1283 events. 569/1283 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8402 event pairs, 520 based on Foata normal form. 98/938 useless extension candidates. Maximal degree in co-relation 2332. Up to 1116 conditions per place. [2023-08-29 21:59:57,953 INFO L137 encePairwiseOnDemand]: 403/435 looper letters, 28 selfloop transitions, 2 changer transitions 26/63 dead transitions. [2023-08-29 21:59:57,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 233 flow [2023-08-29 21:59:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:59:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:59:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-29 21:59:57,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896551724137931 [2023-08-29 21:59:57,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-29 21:59:57,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-29 21:59:57,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:57,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-29 21:59:57,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states 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 21:59:57,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 21:59:57,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 21:59:57,960 INFO L175 Difference]: Start difference. First operand has 70 places, 91 transitions, 187 flow. Second operand 3 states and 639 transitions. [2023-08-29 21:59:57,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 233 flow [2023-08-29 21:59:57,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 233 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:59:57,961 INFO L231 Difference]: Finished difference. Result has 65 places, 37 transitions, 89 flow [2023-08-29 21:59:57,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=65, PETRI_TRANSITIONS=37} [2023-08-29 21:59:57,962 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -5 predicate places. [2023-08-29 21:59:57,963 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 37 transitions, 89 flow [2023-08-29 21:59:57,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states 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 21:59:57,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:57,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:59:57,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:59:57,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:59:57,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:57,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1959566866, now seen corresponding path program 1 times [2023-08-29 21:59:57,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:57,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316255451] [2023-08-29 21:59:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:57,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:59:57,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:57,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316255451] [2023-08-29 21:59:57,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316255451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:59:57,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479590571] [2023-08-29 21:59:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:57,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:57,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:59:57,997 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 21:59:58,022 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 21:59:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:58,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:59:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:59:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:59:58,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:59:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:59:58,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479590571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:59:58,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:59:58,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:59:58,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128622035] [2023-08-29 21:59:58,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:59:58,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:59:58,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:58,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:59:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:59:58,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-29 21:59:58,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 37 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 186.57142857142858) internal successors, (1306), 7 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states 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 21:59:58,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:58,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-29 21:59:58,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:58,185 INFO L130 PetriNetUnfolder]: 107/275 cut-off events. [2023-08-29 21:59:58,185 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:59:58,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 275 events. 107/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1169 event pairs, 100 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 517. Up to 234 conditions per place. [2023-08-29 21:59:58,186 INFO L137 encePairwiseOnDemand]: 432/435 looper letters, 28 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-29 21:59:58,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 167 flow [2023-08-29 21:59:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:59:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:59:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1146 transitions. [2023-08-29 21:59:58,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43908045977011495 [2023-08-29 21:59:58,189 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1146 transitions. [2023-08-29 21:59:58,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1146 transitions. [2023-08-29 21:59:58,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:58,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1146 transitions. [2023-08-29 21:59:58,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 21:59:58,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 435.0) internal successors, (3045), 7 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states 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 21:59:58,196 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 435.0) internal successors, (3045), 7 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states 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 21:59:58,196 INFO L175 Difference]: Start difference. First operand has 65 places, 37 transitions, 89 flow. Second operand 6 states and 1146 transitions. [2023-08-29 21:59:58,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 167 flow [2023-08-29 21:59:58,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 163 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:59:58,197 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 121 flow [2023-08-29 21:59:58,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-29 21:59:58,198 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -23 predicate places. [2023-08-29 21:59:58,198 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 121 flow [2023-08-29 21:59:58,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 186.57142857142858) internal successors, (1306), 7 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states 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 21:59:58,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:58,199 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-29 21:59:58,206 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 21:59:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:58,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:59:58,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash 214250550, now seen corresponding path program 2 times [2023-08-29 21:59:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:58,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12161535] [2023-08-29 21:59:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:59:58,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:58,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12161535] [2023-08-29 21:59:58,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12161535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:59:58,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429019805] [2023-08-29 21:59:58,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:59:58,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:59:58,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:59:58,465 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 21:59:58,468 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 21:59:58,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:59:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:59:58,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:59:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:59:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:59:58,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:59:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:59:58,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429019805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:59:58,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:59:58,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 21:59:58,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373080455] [2023-08-29 21:59:58,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:59:58,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:59:58,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:58,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:59:58,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:59:58,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-29 21:59:58,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 121 flow. Second operand has 13 states, 13 states have (on average 186.30769230769232) internal successors, (2422), 13 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states 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 21:59:58,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:58,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-29 21:59:58,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:59:58,715 INFO L130 PetriNetUnfolder]: 107/281 cut-off events. [2023-08-29 21:59:58,715 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-29 21:59:58,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 281 events. 107/281 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1170 event pairs, 100 based on Foata normal form. 6/173 useless extension candidates. Maximal degree in co-relation 508. Up to 234 conditions per place. [2023-08-29 21:59:58,716 INFO L137 encePairwiseOnDemand]: 432/435 looper letters, 28 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2023-08-29 21:59:58,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 235 flow [2023-08-29 21:59:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:59:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:59:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2265 transitions. [2023-08-29 21:59:58,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339080459770115 [2023-08-29 21:59:58,721 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2265 transitions. [2023-08-29 21:59:58,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2265 transitions. [2023-08-29 21:59:58,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:59:58,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2265 transitions. [2023-08-29 21:59:58,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.75) internal successors, (2265), 12 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states 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 21:59:58,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:59:58,734 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:59:58,734 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 121 flow. Second operand 12 states and 2265 transitions. [2023-08-29 21:59:58,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 235 flow [2023-08-29 21:59:58,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 221 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 21:59:58,735 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 191 flow [2023-08-29 21:59:58,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=191, PETRI_PLACES=63, PETRI_TRANSITIONS=46} [2023-08-29 21:59:58,736 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -7 predicate places. [2023-08-29 21:59:58,737 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 191 flow [2023-08-29 21:59:58,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 186.30769230769232) internal successors, (2422), 13 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states 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 21:59:58,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:58,737 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-29 21:59:58,745 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 21:59:58,944 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,SelfDestructingSolverStorable12 [2023-08-29 21:59:58,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:59:58,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1129830710, now seen corresponding path program 3 times [2023-08-29 21:59:58,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:58,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736922487] [2023-08-29 21:59:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:58,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:59:58,964 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:59:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:59:58,990 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:59:58,990 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:59:58,990 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:59:58,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:59:58,991 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-29 21:59:58,991 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:59:58,992 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:59:58,992 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:59:59,034 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:59:59,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 304 transitions, 626 flow [2023-08-29 21:59:59,091 INFO L130 PetriNetUnfolder]: 75/507 cut-off events. [2023-08-29 21:59:59,091 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-29 21:59:59,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 507 events. 75/507 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2298 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 310. Up to 12 conditions per place. [2023-08-29 21:59:59,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 304 transitions, 626 flow [2023-08-29 21:59:59,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 304 transitions, 626 flow [2023-08-29 21:59:59,103 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:59:59,103 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 304 transitions, 626 flow [2023-08-29 21:59:59,103 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 304 transitions, 626 flow [2023-08-29 21:59:59,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 304 transitions, 626 flow [2023-08-29 21:59:59,147 INFO L130 PetriNetUnfolder]: 75/507 cut-off events. [2023-08-29 21:59:59,147 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-29 21:59:59,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 507 events. 75/507 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2298 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 310. Up to 12 conditions per place. [2023-08-29 21:59:59,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 45036 [2023-08-29 22:00:02,908 INFO L134 LiptonReduction]: Checked pairs total: 91540 [2023-08-29 22:00:02,908 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-08-29 22:00:02,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:00:02,910 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;@67755ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:00:02,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-08-29 22:00:02,911 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-29 22:00:02,911 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:00:02,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:02,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:00:02,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:02,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:02,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1749253, now seen corresponding path program 1 times [2023-08-29 22:00:02,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:02,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537761878] [2023-08-29 22:00:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:02,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:02,927 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 22:00:02,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:02,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537761878] [2023-08-29 22:00:02,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537761878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:00:02,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:00:02,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:00:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897357542] [2023-08-29 22:00:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:00:02,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:00:02,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:00:02,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:00:02,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 569 [2023-08-29 22:00:02,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 22:00:02,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:02,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 569 [2023-08-29 22:00:02,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:05,870 INFO L130 PetriNetUnfolder]: 23659/39443 cut-off events. [2023-08-29 22:00:05,870 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-08-29 22:00:05,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74305 conditions, 39443 events. 23659/39443 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1598. Compared 333774 event pairs, 22344 based on Foata normal form. 3236/29986 useless extension candidates. Maximal degree in co-relation 31621. Up to 34738 conditions per place. [2023-08-29 22:00:06,107 INFO L137 encePairwiseOnDemand]: 527/569 looper letters, 73 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-08-29 22:00:06,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 362 flow [2023-08-29 22:00:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:00:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:00:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-08-29 22:00:06,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513766842413591 [2023-08-29 22:00:06,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-08-29 22:00:06,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-08-29 22:00:06,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:06,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-08-29 22:00:06,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states 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 22:00:06,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states 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 22:00:06,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states 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 22:00:06,114 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 877 transitions. [2023-08-29 22:00:06,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 362 flow [2023-08-29 22:00:06,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:00:06,117 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 222 flow [2023-08-29 22:00:06,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2023-08-29 22:00:06,118 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:00:06,118 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 222 flow [2023-08-29 22:00:06,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 22:00:06,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:06,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:00:06,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 22:00:06,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:06,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:06,119 INFO L85 PathProgramCache]: Analyzing trace with hash 54200632, now seen corresponding path program 1 times [2023-08-29 22:00:06,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:06,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373709488] [2023-08-29 22:00:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:06,150 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 22:00:06,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373709488] [2023-08-29 22:00:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373709488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:00:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583770069] [2023-08-29 22:00:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:06,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:00:06,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:00:06,153 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 22:00:06,155 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 22:00:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:00:06,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:00:06,237 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 22:00:06,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:00:06,246 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 22:00:06,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583770069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:00:06,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:00:06,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 22:00:06,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205574829] [2023-08-29 22:00:06,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:00:06,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:00:06,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:06,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:00:06,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:00:06,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 569 [2023-08-29 22:00:06,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 254.28571428571428) internal successors, (1780), 7 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states 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 22:00:06,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:06,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 569 [2023-08-29 22:00:06,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:08,603 INFO L130 PetriNetUnfolder]: 23659/39446 cut-off events. [2023-08-29 22:00:08,604 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-08-29 22:00:08,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74321 conditions, 39446 events. 23659/39446 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1598. Compared 333773 event pairs, 22344 based on Foata normal form. 0/26753 useless extension candidates. Maximal degree in co-relation 74308. Up to 34738 conditions per place. [2023-08-29 22:00:08,847 INFO L137 encePairwiseOnDemand]: 566/569 looper letters, 73 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2023-08-29 22:00:08,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 390 flow [2023-08-29 22:00:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:00:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:00:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1599 transitions. [2023-08-29 22:00:08,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46836555360281196 [2023-08-29 22:00:08,851 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1599 transitions. [2023-08-29 22:00:08,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1599 transitions. [2023-08-29 22:00:08,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:08,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1599 transitions. [2023-08-29 22:00:08,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.5) internal successors, (1599), 6 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states 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 22:00:08,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 569.0) internal successors, (3983), 7 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states 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 22:00:08,860 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 569.0) internal successors, (3983), 7 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states 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 22:00:08,861 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 222 flow. Second operand 6 states and 1599 transitions. [2023-08-29 22:00:08,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 390 flow [2023-08-29 22:00:08,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 386 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:00:08,863 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 254 flow [2023-08-29 22:00:08,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2023-08-29 22:00:08,864 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2023-08-29 22:00:08,864 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 254 flow [2023-08-29 22:00:08,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 254.28571428571428) internal successors, (1780), 7 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states 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 22:00:08,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:08,865 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-29 22:00:08,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-29 22:00:09,070 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,SelfDestructingSolverStorable15 [2023-08-29 22:00:09,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:09,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:09,072 INFO L85 PathProgramCache]: Analyzing trace with hash -242672124, now seen corresponding path program 2 times [2023-08-29 22:00:09,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:09,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418684644] [2023-08-29 22:00:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:09,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:09,123 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 22:00:09,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:09,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418684644] [2023-08-29 22:00:09,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418684644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:00:09,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723141554] [2023-08-29 22:00:09,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:00:09,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:00:09,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:00:09,125 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 22:00:09,134 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 22:00:09,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:00:09,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:00:09,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:00:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:00:09,222 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 22:00:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 22:00:09,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:00:09,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723141554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:00:09,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:00:09,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-29 22:00:09,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66290598] [2023-08-29 22:00:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:00:09,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:00:09,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:00:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:00:09,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 569 [2023-08-29 22:00:09,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states 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 22:00:09,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:09,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 569 [2023-08-29 22:00:09,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:11,695 INFO L130 PetriNetUnfolder]: 23327/38570 cut-off events. [2023-08-29 22:00:11,695 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2023-08-29 22:00:11,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73462 conditions, 38570 events. 23327/38570 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 324781 event pairs, 10773 based on Foata normal form. 0/26328 useless extension candidates. Maximal degree in co-relation 73427. Up to 34699 conditions per place. [2023-08-29 22:00:11,919 INFO L137 encePairwiseOnDemand]: 565/569 looper letters, 98 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-08-29 22:00:11,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 122 transitions, 498 flow [2023-08-29 22:00:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:00:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:00:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 857 transitions. [2023-08-29 22:00:11,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502050380785003 [2023-08-29 22:00:11,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 857 transitions. [2023-08-29 22:00:11,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 857 transitions. [2023-08-29 22:00:11,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:11,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 857 transitions. [2023-08-29 22:00:11,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 states 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 22:00:11,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states 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 22:00:11,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states 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 22:00:11,928 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 254 flow. Second operand 3 states and 857 transitions. [2023-08-29 22:00:11,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 122 transitions, 498 flow [2023-08-29 22:00:11,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 122 transitions, 484 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 22:00:11,930 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 254 flow [2023-08-29 22:00:11,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2023-08-29 22:00:11,931 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 4 predicate places. [2023-08-29 22:00:11,931 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 254 flow [2023-08-29 22:00:11,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states 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 22:00:11,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:11,932 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-29 22:00:11,940 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 22:00:12,137 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,SelfDestructingSolverStorable16 [2023-08-29 22:00:12,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:12,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash -242672123, now seen corresponding path program 1 times [2023-08-29 22:00:12,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:12,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130218465] [2023-08-29 22:00:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 22:00:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:12,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130218465] [2023-08-29 22:00:12,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130218465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:00:12,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:00:12,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:00:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966733319] [2023-08-29 22:00:12,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:00:12,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:00:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:12,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:00:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:00:12,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 569 [2023-08-29 22:00:12,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states 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 22:00:12,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:12,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 569 [2023-08-29 22:00:12,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:14,370 INFO L130 PetriNetUnfolder]: 22037/36098 cut-off events. [2023-08-29 22:00:14,370 INFO L131 PetriNetUnfolder]: For 973/973 co-relation queries the response was YES. [2023-08-29 22:00:14,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69803 conditions, 36098 events. 22037/36098 cut-off events. For 973/973 co-relation queries the response was YES. Maximal size of possible extension queue 1525. Compared 297817 event pairs, 19171 based on Foata normal form. 0/25337 useless extension candidates. Maximal degree in co-relation 69773. Up to 29798 conditions per place. [2023-08-29 22:00:14,806 INFO L137 encePairwiseOnDemand]: 564/569 looper letters, 112 selfloop transitions, 3 changer transitions 0/137 dead transitions. [2023-08-29 22:00:14,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 137 transitions, 556 flow [2023-08-29 22:00:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:00:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:00:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 862 transitions. [2023-08-29 22:00:14,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50497949619215 [2023-08-29 22:00:14,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 862 transitions. [2023-08-29 22:00:14,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 862 transitions. [2023-08-29 22:00:14,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:14,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 862 transitions. [2023-08-29 22:00:14,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 22:00:14,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states 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 22:00:14,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states 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 22:00:14,833 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 254 flow. Second operand 3 states and 862 transitions. [2023-08-29 22:00:14,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 137 transitions, 556 flow [2023-08-29 22:00:14,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 137 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:00:14,838 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 254 flow [2023-08-29 22:00:14,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=106, PETRI_TRANSITIONS=99} [2023-08-29 22:00:14,838 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 3 predicate places. [2023-08-29 22:00:14,839 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 254 flow [2023-08-29 22:00:14,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states 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 22:00:14,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:14,840 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:00:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 22:00:14,840 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:14,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1364717595, now seen corresponding path program 1 times [2023-08-29 22:00:14,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:14,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452243699] [2023-08-29 22:00:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:14,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:14,903 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 22:00:14,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:14,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452243699] [2023-08-29 22:00:14,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452243699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:00:14,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039044640] [2023-08-29 22:00:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:00:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:00:14,905 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 22:00:14,926 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 22:00:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:14,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:00:14,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:00:15,007 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 22:00:15,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:00:15,050 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 22:00:15,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039044640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:00:15,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:00:15,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 22:00:15,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450188910] [2023-08-29 22:00:15,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:00:15,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:00:15,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:15,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:00:15,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 22:00:15,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 569 [2023-08-29 22:00:15,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 99 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 254.46153846153845) internal successors, (3308), 13 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states 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 22:00:15,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:15,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 569 [2023-08-29 22:00:15,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:17,531 INFO L130 PetriNetUnfolder]: 22109/36256 cut-off events. [2023-08-29 22:00:17,531 INFO L131 PetriNetUnfolder]: For 1244/1244 co-relation queries the response was YES. [2023-08-29 22:00:17,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70842 conditions, 36256 events. 22109/36256 cut-off events. For 1244/1244 co-relation queries the response was YES. Maximal size of possible extension queue 1521. Compared 298822 event pairs, 20767 based on Foata normal form. 6/25942 useless extension candidates. Maximal degree in co-relation 70788. Up to 32279 conditions per place. [2023-08-29 22:00:17,738 INFO L137 encePairwiseOnDemand]: 566/569 looper letters, 72 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-08-29 22:00:17,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 105 transitions, 456 flow [2023-08-29 22:00:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:00:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:00:17,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3124 transitions. [2023-08-29 22:00:17,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45752782659636787 [2023-08-29 22:00:17,745 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3124 transitions. [2023-08-29 22:00:17,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3124 transitions. [2023-08-29 22:00:17,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:17,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3124 transitions. [2023-08-29 22:00:17,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 260.3333333333333) internal successors, (3124), 12 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states 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 22:00:17,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 569.0) internal successors, (7397), 13 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states 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 22:00:17,762 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 569.0) internal successors, (7397), 13 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states 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 22:00:17,762 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 254 flow. Second operand 12 states and 3124 transitions. [2023-08-29 22:00:17,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 105 transitions, 456 flow [2023-08-29 22:00:17,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 105 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:00:17,826 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 332 flow [2023-08-29 22:00:17,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2023-08-29 22:00:17,827 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-08-29 22:00:17,827 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 332 flow [2023-08-29 22:00:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 254.46153846153845) internal successors, (3308), 13 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states 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 22:00:17,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:17,828 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:00:17,838 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 22:00:18,038 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 22:00:18,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:18,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:18,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1955513189, now seen corresponding path program 2 times [2023-08-29 22:00:18,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:18,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537599136] [2023-08-29 22:00:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:18,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:00:18,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:18,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537599136] [2023-08-29 22:00:18,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537599136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:00:18,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:00:18,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:00:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41720811] [2023-08-29 22:00:18,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:00:18,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:00:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:00:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:00:18,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 569 [2023-08-29 22:00:18,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 332 flow. Second operand has 5 states, 5 states have (on average 234.6) internal successors, (1173), 5 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states 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 22:00:18,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:18,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 569 [2023-08-29 22:00:18,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:20,106 INFO L130 PetriNetUnfolder]: 14811/24010 cut-off events. [2023-08-29 22:00:20,106 INFO L131 PetriNetUnfolder]: For 791/791 co-relation queries the response was YES. [2023-08-29 22:00:20,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47703 conditions, 24010 events. 14811/24010 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 192840 event pairs, 428 based on Foata normal form. 441/19144 useless extension candidates. Maximal degree in co-relation 47625. Up to 19053 conditions per place. [2023-08-29 22:00:20,236 INFO L137 encePairwiseOnDemand]: 549/569 looper letters, 179 selfloop transitions, 7 changer transitions 0/200 dead transitions. [2023-08-29 22:00:20,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 200 transitions, 910 flow [2023-08-29 22:00:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:00:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:00:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1599 transitions. [2023-08-29 22:00:20,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46836555360281196 [2023-08-29 22:00:20,240 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1599 transitions. [2023-08-29 22:00:20,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1599 transitions. [2023-08-29 22:00:20,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:20,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1599 transitions. [2023-08-29 22:00:20,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.5) internal successors, (1599), 6 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states 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 22:00:20,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 569.0) internal successors, (3983), 7 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states 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 22:00:20,248 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 569.0) internal successors, (3983), 7 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states 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 22:00:20,248 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 332 flow. Second operand 6 states and 1599 transitions. [2023-08-29 22:00:20,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 200 transitions, 910 flow [2023-08-29 22:00:20,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 200 transitions, 862 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-29 22:00:20,252 INFO L231 Difference]: Finished difference. Result has 117 places, 102 transitions, 329 flow [2023-08-29 22:00:20,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=117, PETRI_TRANSITIONS=102} [2023-08-29 22:00:20,253 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 14 predicate places. [2023-08-29 22:00:20,253 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 102 transitions, 329 flow [2023-08-29 22:00:20,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.6) internal successors, (1173), 5 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states 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 22:00:20,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:20,253 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:00:20,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 22:00:20,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:20,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:20,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1955050471, now seen corresponding path program 1 times [2023-08-29 22:00:20,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:20,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408875199] [2023-08-29 22:00:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:20,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:00:20,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:20,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408875199] [2023-08-29 22:00:20,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408875199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:00:20,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241891657] [2023-08-29 22:00:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:20,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:00:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:00:20,353 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 22:00:20,355 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 22:00:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:00:20,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:00:20,465 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 22:00:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:00:20,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:00:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:00:20,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241891657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:00:20,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:00:20,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-29 22:00:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218215095] [2023-08-29 22:00:20,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:00:20,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:00:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:00:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:00:20,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 569 [2023-08-29 22:00:20,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 329 flow. Second operand has 8 states, 8 states have (on average 251.125) internal successors, (2009), 8 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states 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 22:00:20,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:20,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 569 [2023-08-29 22:00:20,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:21,203 INFO L130 PetriNetUnfolder]: 1479/2807 cut-off events. [2023-08-29 22:00:21,204 INFO L131 PetriNetUnfolder]: For 874/874 co-relation queries the response was YES. [2023-08-29 22:00:21,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6384 conditions, 2807 events. 1479/2807 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18051 event pairs, 0 based on Foata normal form. 320/2814 useless extension candidates. Maximal degree in co-relation 6327. Up to 1754 conditions per place. [2023-08-29 22:00:21,214 INFO L137 encePairwiseOnDemand]: 565/569 looper letters, 98 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2023-08-29 22:00:21,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 499 flow [2023-08-29 22:00:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:00:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:00:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1340 transitions. [2023-08-29 22:00:21,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4710017574692443 [2023-08-29 22:00:21,216 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1340 transitions. [2023-08-29 22:00:21,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1340 transitions. [2023-08-29 22:00:21,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:21,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1340 transitions. [2023-08-29 22:00:21,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 22:00:21,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 569.0) internal successors, (3414), 6 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states 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 22:00:21,222 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 569.0) internal successors, (3414), 6 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states 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 22:00:21,222 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 329 flow. Second operand 5 states and 1340 transitions. [2023-08-29 22:00:21,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 499 flow [2023-08-29 22:00:21,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 109 transitions, 485 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-29 22:00:21,226 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 187 flow [2023-08-29 22:00:21,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2023-08-29 22:00:21,227 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -25 predicate places. [2023-08-29 22:00:21,227 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 187 flow [2023-08-29 22:00:21,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 251.125) internal successors, (2009), 8 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states 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 22:00:21,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:21,227 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:00:21,236 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 22:00:21,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-29 22:00:21,432 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:21,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:21,433 INFO L85 PathProgramCache]: Analyzing trace with hash 491365162, now seen corresponding path program 1 times [2023-08-29 22:00:21,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:21,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749546756] [2023-08-29 22:00:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:21,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:00:21,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:21,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749546756] [2023-08-29 22:00:21,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749546756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:00:21,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:00:21,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:00:21,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159446092] [2023-08-29 22:00:21,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:00:21,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:00:21,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:00:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:00:21,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 569 [2023-08-29 22:00:21,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 227.5) internal successors, (1365), 6 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 22:00:21,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:21,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 569 [2023-08-29 22:00:21,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:22,213 INFO L130 PetriNetUnfolder]: 1589/2800 cut-off events. [2023-08-29 22:00:22,213 INFO L131 PetriNetUnfolder]: For 1142/1142 co-relation queries the response was YES. [2023-08-29 22:00:22,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6254 conditions, 2800 events. 1589/2800 cut-off events. For 1142/1142 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16719 event pairs, 635 based on Foata normal form. 0/2538 useless extension candidates. Maximal degree in co-relation 6200. Up to 1572 conditions per place. [2023-08-29 22:00:22,225 INFO L137 encePairwiseOnDemand]: 560/569 looper letters, 71 selfloop transitions, 6 changer transitions 10/95 dead transitions. [2023-08-29 22:00:22,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 451 flow [2023-08-29 22:00:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:00:22,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:00:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1207 transitions. [2023-08-29 22:00:22,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42425307557117753 [2023-08-29 22:00:22,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1207 transitions. [2023-08-29 22:00:22,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1207 transitions. [2023-08-29 22:00:22,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:22,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1207 transitions. [2023-08-29 22:00:22,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.4) internal successors, (1207), 5 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states 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 22:00:22,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 569.0) internal successors, (3414), 6 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states 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 22:00:22,233 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 569.0) internal successors, (3414), 6 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states 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 22:00:22,233 INFO L175 Difference]: Start difference. First operand has 78 places, 59 transitions, 187 flow. Second operand 5 states and 1207 transitions. [2023-08-29 22:00:22,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 451 flow [2023-08-29 22:00:22,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 95 transitions, 438 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 22:00:22,236 INFO L231 Difference]: Finished difference. Result has 82 places, 61 transitions, 220 flow [2023-08-29 22:00:22,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=82, PETRI_TRANSITIONS=61} [2023-08-29 22:00:22,237 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -21 predicate places. [2023-08-29 22:00:22,237 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 61 transitions, 220 flow [2023-08-29 22:00:22,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 227.5) internal successors, (1365), 6 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 22:00:22,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:22,237 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:00:22,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 22:00:22,238 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:22,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1026330071, now seen corresponding path program 1 times [2023-08-29 22:00:22,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:22,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559047861] [2023-08-29 22:00:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:22,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-29 22:00:22,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:22,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559047861] [2023-08-29 22:00:22,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559047861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:00:22,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:00:22,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:00:22,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627820512] [2023-08-29 22:00:22,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:00:22,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:00:22,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:22,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:00:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:00:22,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 569 [2023-08-29 22:00:22,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 61 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states 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 22:00:22,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:22,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 569 [2023-08-29 22:00:22,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:22,839 INFO L130 PetriNetUnfolder]: 1114/2061 cut-off events. [2023-08-29 22:00:22,840 INFO L131 PetriNetUnfolder]: For 826/826 co-relation queries the response was YES. [2023-08-29 22:00:22,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4899 conditions, 2061 events. 1114/2061 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11842 event pairs, 138 based on Foata normal form. 48/2018 useless extension candidates. Maximal degree in co-relation 4842. Up to 1695 conditions per place. [2023-08-29 22:00:22,846 INFO L137 encePairwiseOnDemand]: 564/569 looper letters, 56 selfloop transitions, 2 changer transitions 8/74 dead transitions. [2023-08-29 22:00:22,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 389 flow [2023-08-29 22:00:22,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:00:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:00:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 986 transitions. [2023-08-29 22:00:22,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43321616871704743 [2023-08-29 22:00:22,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 986 transitions. [2023-08-29 22:00:22,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 986 transitions. [2023-08-29 22:00:22,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:22,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 986 transitions. [2023-08-29 22:00:22,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 246.5) internal successors, (986), 4 states have internal predecessors, (986), 0 states have call successors, (0), 0 states 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 22:00:22,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 569.0) internal successors, (2845), 5 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states 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 22:00:22,853 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 569.0) internal successors, (2845), 5 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states 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 22:00:22,853 INFO L175 Difference]: Start difference. First operand has 82 places, 61 transitions, 220 flow. Second operand 4 states and 986 transitions. [2023-08-29 22:00:22,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 389 flow [2023-08-29 22:00:22,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 74 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:00:22,856 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 190 flow [2023-08-29 22:00:22,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2023-08-29 22:00:22,857 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -23 predicate places. [2023-08-29 22:00:22,857 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 190 flow [2023-08-29 22:00:22,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states 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 22:00:22,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:22,858 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:00:22,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 22:00:22,858 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:22,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1519545939, now seen corresponding path program 1 times [2023-08-29 22:00:22,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:22,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511176008] [2023-08-29 22:00:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:22,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:00:23,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:23,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511176008] [2023-08-29 22:00:23,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511176008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:00:23,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:00:23,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:00:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218307452] [2023-08-29 22:00:23,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:00:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:00:23,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:00:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:00:23,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 569 [2023-08-29 22:00:23,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 237.2) internal successors, (1186), 5 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 22:00:23,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:23,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 569 [2023-08-29 22:00:23,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:23,405 INFO L130 PetriNetUnfolder]: 493/988 cut-off events. [2023-08-29 22:00:23,405 INFO L131 PetriNetUnfolder]: For 424/424 co-relation queries the response was YES. [2023-08-29 22:00:23,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2446 conditions, 988 events. 493/988 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5068 event pairs, 193 based on Foata normal form. 102/1005 useless extension candidates. Maximal degree in co-relation 2388. Up to 533 conditions per place. [2023-08-29 22:00:23,410 INFO L137 encePairwiseOnDemand]: 556/569 looper letters, 44 selfloop transitions, 13 changer transitions 4/68 dead transitions. [2023-08-29 22:00:23,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 68 transitions, 362 flow [2023-08-29 22:00:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:00:23,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:00:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 991 transitions. [2023-08-29 22:00:23,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354130052724077 [2023-08-29 22:00:23,412 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 991 transitions. [2023-08-29 22:00:23,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 991 transitions. [2023-08-29 22:00:23,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:23,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 991 transitions. [2023-08-29 22:00:23,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 247.75) internal successors, (991), 4 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 22:00:23,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 569.0) internal successors, (2845), 5 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states 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 22:00:23,417 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 569.0) internal successors, (2845), 5 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states 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 22:00:23,417 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 190 flow. Second operand 4 states and 991 transitions. [2023-08-29 22:00:23,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 68 transitions, 362 flow [2023-08-29 22:00:23,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 68 transitions, 352 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:00:23,420 INFO L231 Difference]: Finished difference. Result has 78 places, 54 transitions, 227 flow [2023-08-29 22:00:23,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=78, PETRI_TRANSITIONS=54} [2023-08-29 22:00:23,420 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -25 predicate places. [2023-08-29 22:00:23,421 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 54 transitions, 227 flow [2023-08-29 22:00:23,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 237.2) internal successors, (1186), 5 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 22:00:23,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:23,422 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:00:23,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 22:00:23,422 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:23,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:23,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1719128707, now seen corresponding path program 1 times [2023-08-29 22:00:23,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:23,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97815142] [2023-08-29 22:00:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:00:24,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:24,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97815142] [2023-08-29 22:00:24,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97815142] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:00:24,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552414123] [2023-08-29 22:00:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:24,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:00:24,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:00:24,016 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 22:00:24,019 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 22:00:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:24,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-29 22:00:24,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:00:24,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:00:24,247 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:00:24,248 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 22:00:24,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:00:24,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:00:24,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:00:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:00:24,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:00:24,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:00:24,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:00:24,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:00:24,530 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:00:24,530 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 25 treesize of output 11 [2023-08-29 22:00:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:00:24,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:00:24,664 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_732 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_99| Int)) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_99| 28))) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_99|) (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0) (< |v_t_funThread2of2ForFork0_~i~0#1_99| 1) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_732) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0))))) is different from false [2023-08-29 22:00:24,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:00:24,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:00:24,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:00:24,820 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 48 treesize of output 38 [2023-08-29 22:00:24,828 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 25 treesize of output 18 [2023-08-29 22:00:45,076 WARN L839 $PredicateComparison]: unable to prove that (and (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((v_ArrVal_726 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_99| Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_99|) (forall ((v_ArrVal_731 Int) (|~#a~0.offset| Int) (|v_t_funThread1of2ForFork0_~i~0#1_92| Int)) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_726) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_92| 28) |~#a~0.offset|) v_ArrVal_731) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_99| 28) |~#a~0.offset|)) 0) (= |v_t_funThread2of2ForFork0_~i~0#1_99| |v_t_funThread1of2ForFork0_~i~0#1_92|))) (< |v_t_funThread2of2ForFork0_~i~0#1_99| 1)))) is different from false [2023-08-29 22:00:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-29 22:00:49,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552414123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:00:49,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:00:49,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-29 22:00:49,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166125048] [2023-08-29 22:00:49,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:00:49,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 22:00:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:00:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 22:00:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=266, Unknown=11, NotChecked=74, Total=462 [2023-08-29 22:00:49,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 569 [2023-08-29 22:00:49,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 54 transitions, 227 flow. Second operand has 22 states, 22 states have (on average 151.3181818181818) internal successors, (3329), 22 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states 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 22:00:49,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:00:49,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 569 [2023-08-29 22:00:49,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:00:52,305 INFO L130 PetriNetUnfolder]: 751/1510 cut-off events. [2023-08-29 22:00:52,305 INFO L131 PetriNetUnfolder]: For 878/884 co-relation queries the response was YES. [2023-08-29 22:00:52,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1510 events. 751/1510 cut-off events. For 878/884 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8958 event pairs, 53 based on Foata normal form. 12/1396 useless extension candidates. Maximal degree in co-relation 4065. Up to 680 conditions per place. [2023-08-29 22:00:52,312 INFO L137 encePairwiseOnDemand]: 559/569 looper letters, 95 selfloop transitions, 23 changer transitions 25/149 dead transitions. [2023-08-29 22:00:52,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 149 transitions, 863 flow [2023-08-29 22:00:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:00:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:00:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1915 transitions. [2023-08-29 22:00:52,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28046280023432923 [2023-08-29 22:00:52,316 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1915 transitions. [2023-08-29 22:00:52,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1915 transitions. [2023-08-29 22:00:52,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:00:52,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1915 transitions. [2023-08-29 22:00:52,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.58333333333334) internal successors, (1915), 12 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states 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 22:00:52,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 569.0) internal successors, (7397), 13 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states 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 22:00:52,324 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 569.0) internal successors, (7397), 13 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states 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 22:00:52,324 INFO L175 Difference]: Start difference. First operand has 78 places, 54 transitions, 227 flow. Second operand 12 states and 1915 transitions. [2023-08-29 22:00:52,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 149 transitions, 863 flow [2023-08-29 22:00:52,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 149 transitions, 862 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:00:52,328 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 387 flow [2023-08-29 22:00:52,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=387, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2023-08-29 22:00:52,329 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -10 predicate places. [2023-08-29 22:00:52,329 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 387 flow [2023-08-29 22:00:52,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 151.3181818181818) internal successors, (3329), 22 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states 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 22:00:52,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:00:52,330 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:00:52,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-29 22:00:52,534 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,SelfDestructingSolverStorable24 [2023-08-29 22:00:52,535 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:00:52,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:00:52,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1771308687, now seen corresponding path program 2 times [2023-08-29 22:00:52,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:00:52,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228802035] [2023-08-29 22:00:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:00:52,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:00:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:00:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:00:53,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:00:53,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228802035] [2023-08-29 22:00:53,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228802035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:00:53,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121755347] [2023-08-29 22:00:53,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:00:53,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:00:53,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:00:53,028 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 22:00:53,030 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 22:00:53,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:00:53,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:00:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-29 22:00:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:00:53,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:00:53,309 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:00:53,310 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 22:00:53,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:00:53,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:00:53,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:00:53,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:00:53,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:00:53,502 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:00:53,503 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 25 treesize of output 11 [2023-08-29 22:00:53,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:00:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:00:53,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:00:53,678 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_816 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_816) |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset| (- 24))) 0))) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_101| Int) (v_ArrVal_816 (Array Int Int))) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_101| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_816) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0)) (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0))))) is different from false [2023-08-29 22:00:53,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:00:53,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:00:53,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:00:53,725 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 48 treesize of output 38 [2023-08-29 22:00:53,730 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 25 treesize of output 18 [2023-08-29 22:00:53,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:00:53,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:00:53,752 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 48 treesize of output 30 [2023-08-29 22:01:05,807 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_101| Int) (v_ArrVal_813 (Array Int Int)) (|~#a~0.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_813) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_101| 28) |~#a~0.offset|)) 0)) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) is different from false [2023-08-29 22:01:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-29 22:01:08,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121755347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:01:08,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:01:08,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-08-29 22:01:08,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184132367] [2023-08-29 22:01:08,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:01:08,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 22:01:08,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:01:08,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 22:01:08,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=287, Unknown=4, NotChecked=74, Total=462 [2023-08-29 22:01:08,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 569 [2023-08-29 22:01:08,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 387 flow. Second operand has 22 states, 22 states have (on average 149.22727272727272) internal successors, (3283), 22 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states 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 22:01:08,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:01:08,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 569 [2023-08-29 22:01:08,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:01:12,036 INFO L130 PetriNetUnfolder]: 1012/2000 cut-off events. [2023-08-29 22:01:12,036 INFO L131 PetriNetUnfolder]: For 5250/5256 co-relation queries the response was YES. [2023-08-29 22:01:12,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6932 conditions, 2000 events. 1012/2000 cut-off events. For 5250/5256 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12618 event pairs, 161 based on Foata normal form. 12/1820 useless extension candidates. Maximal degree in co-relation 6869. Up to 1066 conditions per place. [2023-08-29 22:01:12,044 INFO L137 encePairwiseOnDemand]: 558/569 looper letters, 109 selfloop transitions, 26 changer transitions 23/164 dead transitions. [2023-08-29 22:01:12,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 164 transitions, 1131 flow [2023-08-29 22:01:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 22:01:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 22:01:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2036 transitions. [2023-08-29 22:01:12,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2752467216439097 [2023-08-29 22:01:12,047 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2036 transitions. [2023-08-29 22:01:12,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2036 transitions. [2023-08-29 22:01:12,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:01:12,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2036 transitions. [2023-08-29 22:01:12,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 156.6153846153846) internal successors, (2036), 13 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states 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 22:01:12,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 569.0) internal successors, (7966), 14 states have internal predecessors, (7966), 0 states have call successors, (0), 0 states 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 22:01:12,056 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 569.0) internal successors, (7966), 14 states have internal predecessors, (7966), 0 states have call successors, (0), 0 states 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 22:01:12,056 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 387 flow. Second operand 13 states and 2036 transitions. [2023-08-29 22:01:12,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 164 transitions, 1131 flow [2023-08-29 22:01:12,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 164 transitions, 1100 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-29 22:01:12,070 INFO L231 Difference]: Finished difference. Result has 106 places, 89 transitions, 543 flow [2023-08-29 22:01:12,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=543, PETRI_PLACES=106, PETRI_TRANSITIONS=89} [2023-08-29 22:01:12,071 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 3 predicate places. [2023-08-29 22:01:12,071 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 89 transitions, 543 flow [2023-08-29 22:01:12,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 149.22727272727272) internal successors, (3283), 22 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states 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 22:01:12,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:01:12,072 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:01:12,080 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 22:01:12,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:01:12,277 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:01:12,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:01:12,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2057459814, now seen corresponding path program 1 times [2023-08-29 22:01:12,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:01:12,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257839608] [2023-08-29 22:01:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:01:12,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:01:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:01:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:01:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:01:12,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257839608] [2023-08-29 22:01:12,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257839608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:01:12,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342427584] [2023-08-29 22:01:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:01:12,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:01:12,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:01:12,685 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 22:01:12,687 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 22:01:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:01:12,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 22:01:12,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:01:12,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:01:12,893 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:01:12,894 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 22:01:12,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:01:12,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:01:12,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:01:13,006 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:01:13,007 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 25 treesize of output 11 [2023-08-29 22:01:13,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:01:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:01:13,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:01:13,264 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 21 treesize of output 19 [2023-08-29 22:01:13,270 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 15 treesize of output 8 [2023-08-29 22:01:17,301 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array Int Int)) (|~#a~0.offset| Int) (|v_t_funThread1of2ForFork0_~i~0#1_96| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_899) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_96| 28) |~#a~0.offset|)) 0)) is different from false [2023-08-29 22:01:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-29 22:01:17,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342427584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:01:17,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:01:17,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-29 22:01:17,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475668566] [2023-08-29 22:01:17,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:01:17,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:01:17,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:01:17,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:01:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=171, Unknown=3, NotChecked=28, Total=272 [2023-08-29 22:01:17,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 569 [2023-08-29 22:01:17,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 89 transitions, 543 flow. Second operand has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states 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 22:01:17,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:01:17,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 569 [2023-08-29 22:01:17,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:01:18,258 INFO L130 PetriNetUnfolder]: 1092/2173 cut-off events. [2023-08-29 22:01:18,258 INFO L131 PetriNetUnfolder]: For 7433/7439 co-relation queries the response was YES. [2023-08-29 22:01:18,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8009 conditions, 2173 events. 1092/2173 cut-off events. For 7433/7439 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14110 event pairs, 194 based on Foata normal form. 12/1972 useless extension candidates. Maximal degree in co-relation 7942. Up to 1354 conditions per place. [2023-08-29 22:01:18,268 INFO L137 encePairwiseOnDemand]: 559/569 looper letters, 106 selfloop transitions, 17 changer transitions 16/145 dead transitions. [2023-08-29 22:01:18,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1101 flow [2023-08-29 22:01:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:01:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:01:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1447 transitions. [2023-08-29 22:01:18,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2825619996094513 [2023-08-29 22:01:18,270 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1447 transitions. [2023-08-29 22:01:18,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1447 transitions. [2023-08-29 22:01:18,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:01:18,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1447 transitions. [2023-08-29 22:01:18,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.77777777777777) internal successors, (1447), 9 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states 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 22:01:18,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:01:18,274 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:01:18,274 INFO L175 Difference]: Start difference. First operand has 106 places, 89 transitions, 543 flow. Second operand 9 states and 1447 transitions. [2023-08-29 22:01:18,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1101 flow [2023-08-29 22:01:18,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 145 transitions, 1082 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 22:01:18,287 INFO L231 Difference]: Finished difference. Result has 114 places, 94 transitions, 637 flow [2023-08-29 22:01:18,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=637, PETRI_PLACES=114, PETRI_TRANSITIONS=94} [2023-08-29 22:01:18,287 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 11 predicate places. [2023-08-29 22:01:18,288 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 94 transitions, 637 flow [2023-08-29 22:01:18,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states 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 22:01:18,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:01:18,288 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:01:18,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-29 22:01:18,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-29 22:01:18,494 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:01:18,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:01:18,494 INFO L85 PathProgramCache]: Analyzing trace with hash 433906557, now seen corresponding path program 3 times [2023-08-29 22:01:18,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:01:18,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296116139] [2023-08-29 22:01:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:01:18,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:01:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:01:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:01:18,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:01:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296116139] [2023-08-29 22:01:18,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296116139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:01:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593269735] [2023-08-29 22:01:18,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:01:18,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:01:18,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:01:18,806 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:01:18,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-29 22:01:18,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:01:18,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:01:18,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 22:01:18,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:01:18,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:01:19,023 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:01:19,023 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 22:01:19,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:01:19,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:01:19,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:01:19,135 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:01:19,136 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 25 treesize of output 11 [2023-08-29 22:01:19,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:01:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:01:19,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:01:19,307 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 21 treesize of output 19 [2023-08-29 22:01:19,311 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 15 treesize of output 8 [2023-08-29 22:01:21,911 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_~i~0#1_105| Int) (|~#a~0.offset| Int) (v_ArrVal_984 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_984) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_105| 28) |~#a~0.offset|)) 0)) is different from false [2023-08-29 22:01:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-29 22:01:22,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593269735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:01:22,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:01:22,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-29 22:01:22,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188484204] [2023-08-29 22:01:22,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:01:22,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:01:22,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:01:22,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:01:22,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=172, Unknown=2, NotChecked=28, Total=272 [2023-08-29 22:01:22,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 569 [2023-08-29 22:01:22,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 94 transitions, 637 flow. Second operand has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states 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 22:01:22,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:01:22,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 569 [2023-08-29 22:01:22,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:01:23,125 INFO L130 PetriNetUnfolder]: 1138/2290 cut-off events. [2023-08-29 22:01:23,125 INFO L131 PetriNetUnfolder]: For 12402/12414 co-relation queries the response was YES. [2023-08-29 22:01:23,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9089 conditions, 2290 events. 1138/2290 cut-off events. For 12402/12414 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15246 event pairs, 177 based on Foata normal form. 12/2079 useless extension candidates. Maximal degree in co-relation 9018. Up to 1432 conditions per place. [2023-08-29 22:01:23,136 INFO L137 encePairwiseOnDemand]: 559/569 looper letters, 110 selfloop transitions, 18 changer transitions 17/151 dead transitions. [2023-08-29 22:01:23,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 151 transitions, 1228 flow [2023-08-29 22:01:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:01:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:01:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1448 transitions. [2023-08-29 22:01:23,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2827572739699277 [2023-08-29 22:01:23,138 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1448 transitions. [2023-08-29 22:01:23,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1448 transitions. [2023-08-29 22:01:23,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:01:23,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1448 transitions. [2023-08-29 22:01:23,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.88888888888889) internal successors, (1448), 9 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states 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 22:01:23,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:01:23,142 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:01:23,142 INFO L175 Difference]: Start difference. First operand has 114 places, 94 transitions, 637 flow. Second operand 9 states and 1448 transitions. [2023-08-29 22:01:23,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 151 transitions, 1228 flow [2023-08-29 22:01:23,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 151 transitions, 1158 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-29 22:01:23,163 INFO L231 Difference]: Finished difference. Result has 120 places, 100 transitions, 688 flow [2023-08-29 22:01:23,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=688, PETRI_PLACES=120, PETRI_TRANSITIONS=100} [2023-08-29 22:01:23,164 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 17 predicate places. [2023-08-29 22:01:23,164 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 100 transitions, 688 flow [2023-08-29 22:01:23,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states 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 22:01:23,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:01:23,165 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:01:23,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-29 22:01:23,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-29 22:01:23,370 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:01:23,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:01:23,371 INFO L85 PathProgramCache]: Analyzing trace with hash 719693362, now seen corresponding path program 2 times [2023-08-29 22:01:23,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:01:23,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253964729] [2023-08-29 22:01:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:01:23,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:01:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:01:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:01:23,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:01:23,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253964729] [2023-08-29 22:01:23,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253964729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:01:23,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008450248] [2023-08-29 22:01:23,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:01:23,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:01:23,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:01:23,853 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:01:23,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-29 22:01:23,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:01:23,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:01:23,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-29 22:01:23,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:01:23,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:01:24,099 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:01:24,099 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 22:01:24,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:01:24,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:01:24,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:01:24,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:01:24,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:01:24,274 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:01:24,274 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 25 treesize of output 11 [2023-08-29 22:01:24,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:01:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:01:24,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:01:24,425 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1072 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1072) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28) (- 24))) 0))) (forall ((|v_t_funThread1of2ForFork0_~i~0#1_100| Int) (v_ArrVal_1072 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_100| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1072) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0)) (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0))))) is different from false [2023-08-29 22:01:24,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:01:24,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:01:24,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:01:24,459 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 48 treesize of output 38 [2023-08-29 22:01:24,465 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 25 treesize of output 18 [2023-08-29 22:01:24,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:01:24,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:01:24,486 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 48 treesize of output 30 [2023-08-29 22:01:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:01:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008450248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:01:39,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:01:39,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-29 22:01:39,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694309091] [2023-08-29 22:01:39,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:01:39,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 22:01:39,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:01:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 22:01:39,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=258, Unknown=3, NotChecked=34, Total=380 [2023-08-29 22:01:39,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 569 [2023-08-29 22:01:39,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 100 transitions, 688 flow. Second operand has 20 states, 20 states have (on average 151.4) internal successors, (3028), 20 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states 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 22:01:39,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:01:39,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 569 [2023-08-29 22:01:39,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:01:40,107 INFO L130 PetriNetUnfolder]: 1272/2564 cut-off events. [2023-08-29 22:01:40,108 INFO L131 PetriNetUnfolder]: For 16186/16204 co-relation queries the response was YES. [2023-08-29 22:01:40,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10357 conditions, 2564 events. 1272/2564 cut-off events. For 16186/16204 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17518 event pairs, 234 based on Foata normal form. 15/2326 useless extension candidates. Maximal degree in co-relation 10283. Up to 1604 conditions per place. [2023-08-29 22:01:40,119 INFO L137 encePairwiseOnDemand]: 559/569 looper letters, 120 selfloop transitions, 24 changer transitions 18/168 dead transitions. [2023-08-29 22:01:40,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 168 transitions, 1430 flow [2023-08-29 22:01:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 22:01:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 22:01:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1749 transitions. [2023-08-29 22:01:40,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27943760984182775 [2023-08-29 22:01:40,122 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1749 transitions. [2023-08-29 22:01:40,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1749 transitions. [2023-08-29 22:01:40,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:01:40,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1749 transitions. [2023-08-29 22:01:40,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 159.0) internal successors, (1749), 11 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states 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 22:01:40,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 569.0) internal successors, (6828), 12 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states 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 22:01:40,129 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 569.0) internal successors, (6828), 12 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states 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 22:01:40,129 INFO L175 Difference]: Start difference. First operand has 120 places, 100 transitions, 688 flow. Second operand 11 states and 1749 transitions. [2023-08-29 22:01:40,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 168 transitions, 1430 flow [2023-08-29 22:01:40,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 168 transitions, 1351 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-08-29 22:01:40,162 INFO L231 Difference]: Finished difference. Result has 127 places, 112 transitions, 890 flow [2023-08-29 22:01:40,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=890, PETRI_PLACES=127, PETRI_TRANSITIONS=112} [2023-08-29 22:01:40,167 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 24 predicate places. [2023-08-29 22:01:40,167 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 112 transitions, 890 flow [2023-08-29 22:01:40,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 151.4) internal successors, (3028), 20 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states 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 22:01:40,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:01:40,168 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:01:40,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-29 22:01:40,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-29 22:01:40,374 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:01:40,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:01:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash -80638222, now seen corresponding path program 3 times [2023-08-29 22:01:40,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:01:40,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64394610] [2023-08-29 22:01:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:01:40,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:01:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:01:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:01:43,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:01:43,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64394610] [2023-08-29 22:01:43,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64394610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:01:43,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269536649] [2023-08-29 22:01:43,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:01:43,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:01:43,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:01:43,413 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:01:43,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-29 22:01:43,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:01:43,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:01:43,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-29 22:01:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:01:43,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:01:43,686 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:01:43,686 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 22:01:43,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:01:43,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:01:43,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:01:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:01:43,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:01:43,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:01:43,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:01:43,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:01:43,999 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:01:43,999 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 25 treesize of output 11 [2023-08-29 22:01:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:01:44,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:01:44,156 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_~i~0#1_102| Int) (v_ArrVal_1161 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_102| 28))) (or (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1161) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0))))) is different from false [2023-08-29 22:01:44,164 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_~i~0#1_102| Int) (v_ArrVal_1159 Int) (v_ArrVal_1161 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_102| 28))) (or (= (select (store (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28)) v_ArrVal_1159) (+ |c_~#a~0.offset| .cse0)) 0) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1161) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0))))) is different from false [2023-08-29 22:01:44,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:01:44,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:01:44,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:01:44,230 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 48 treesize of output 38 [2023-08-29 22:01:44,235 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 25 treesize of output 18 [2023-08-29 22:01:54,389 WARN L839 $PredicateComparison]: unable to prove that (and (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread1of2ForFork0_~i~0#1_102| Int) (v_ArrVal_1155 (Array Int Int)) (|~#a~0.offset| Int) (|v_t_funThread2of2ForFork0_~i~0#1_109| Int) (v_ArrVal_1159 Int)) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1155) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_109| 28) |~#a~0.offset|) v_ArrVal_1159) (+ |~#a~0.offset| (* |v_t_funThread1of2ForFork0_~i~0#1_102| 28))) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_102| |v_t_funThread2of2ForFork0_~i~0#1_109|)))) is different from false [2023-08-29 22:01:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-29 22:01:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269536649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:01:58,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:01:58,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 31 [2023-08-29 22:01:58,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957369625] [2023-08-29 22:01:58,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:01:58,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-29 22:01:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:01:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-29 22:01:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=663, Unknown=5, NotChecked=174, Total=1056 [2023-08-29 22:01:58,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 569 [2023-08-29 22:01:58,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 112 transitions, 890 flow. Second operand has 33 states, 33 states have (on average 143.9090909090909) internal successors, (4749), 33 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states 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 22:01:58,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:01:58,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 569 [2023-08-29 22:01:58,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:02:00,337 INFO L130 PetriNetUnfolder]: 1252/2569 cut-off events. [2023-08-29 22:02:00,337 INFO L131 PetriNetUnfolder]: For 13896/13896 co-relation queries the response was YES. [2023-08-29 22:02:00,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10064 conditions, 2569 events. 1252/2569 cut-off events. For 13896/13896 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17920 event pairs, 219 based on Foata normal form. 3/2313 useless extension candidates. Maximal degree in co-relation 9988. Up to 1574 conditions per place. [2023-08-29 22:02:00,349 INFO L137 encePairwiseOnDemand]: 558/569 looper letters, 103 selfloop transitions, 37 changer transitions 13/159 dead transitions. [2023-08-29 22:02:00,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 159 transitions, 1483 flow [2023-08-29 22:02:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 22:02:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 22:02:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2654 transitions. [2023-08-29 22:02:00,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25912907635227495 [2023-08-29 22:02:00,353 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2654 transitions. [2023-08-29 22:02:00,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2654 transitions. [2023-08-29 22:02:00,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:02:00,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2654 transitions. [2023-08-29 22:02:00,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 147.44444444444446) internal successors, (2654), 18 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states 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 22:02:00,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 569.0) internal successors, (10811), 19 states have internal predecessors, (10811), 0 states have call successors, (0), 0 states 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 22:02:00,364 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 569.0) internal successors, (10811), 19 states have internal predecessors, (10811), 0 states have call successors, (0), 0 states 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 22:02:00,364 INFO L175 Difference]: Start difference. First operand has 127 places, 112 transitions, 890 flow. Second operand 18 states and 2654 transitions. [2023-08-29 22:02:00,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 159 transitions, 1483 flow [2023-08-29 22:02:00,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 159 transitions, 1267 flow, removed 105 selfloop flow, removed 2 redundant places. [2023-08-29 22:02:00,409 INFO L231 Difference]: Finished difference. Result has 144 places, 118 transitions, 911 flow [2023-08-29 22:02:00,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=911, PETRI_PLACES=144, PETRI_TRANSITIONS=118} [2023-08-29 22:02:00,410 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 41 predicate places. [2023-08-29 22:02:00,410 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 118 transitions, 911 flow [2023-08-29 22:02:00,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 143.9090909090909) internal successors, (4749), 33 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states 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 22:02:00,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:00,411 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:02:00,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-29 22:02:00,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:00,617 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:02:00,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1808571121, now seen corresponding path program 4 times [2023-08-29 22:02:00,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:00,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992283005] [2023-08-29 22:02:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:00,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:02:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:02:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992283005] [2023-08-29 22:02:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992283005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:02:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397604918] [2023-08-29 22:02:01,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:02:01,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:01,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:02:01,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:02:01,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-29 22:02:01,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:02:01,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:02:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-29 22:02:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:02:01,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:02:01,350 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:01,350 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 22:02:01,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:02:01,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:02:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:02:01,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:02:01,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:02:01,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:02:01,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:02:01,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 22 [2023-08-29 22:02:01,634 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:01,635 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 25 treesize of output 11 [2023-08-29 22:02:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:02:01,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:02:01,856 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1248 (Array Int Int)) (v_ArrVal_1247 (Array Int Int)) (v_ArrVal_1245 Int)) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_111| 28))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_111| 1) (not (= 0 (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1247) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))))) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_111|) (= 0 (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) v_ArrVal_1245)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1248) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)))))) is different from false [2023-08-29 22:02:01,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:02:01,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:02:01,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:02:01,947 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 48 treesize of output 38 [2023-08-29 22:02:01,954 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 25 treesize of output 18 [2023-08-29 22:02:04,007 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_111| Int)) (or (< |v_t_funThread2of2ForFork0_~i~0#1_111| 1) (forall ((v_ArrVal_1248 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_104| Int) (|~#a~0.offset| Int) (v_ArrVal_1245 Int)) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread1of2ForFork0_~i~0#1_104| 28) |~#a~0.offset|) v_ArrVal_1245)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1248) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_104| |v_t_funThread2of2ForFork0_~i~0#1_111|))) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_111|))) (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1248 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_104| Int) (|~#a~0.offset| Int) (v_ArrVal_1245 Int)) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread1of2ForFork0_~i~0#1_104| 28) |~#a~0.offset|) v_ArrVal_1245)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1248) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0) (< |v_t_funThread2of2ForFork0_~i~0#1_111| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_111|)))))) is different from false [2023-08-29 22:02:06,140 WARN L839 $PredicateComparison]: unable to prove that (and (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1248 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_104| Int) (|~#a~0.offset| Int) (v_ArrVal_1245 Int) (v_ArrVal_1241 (Array Int Int))) (or (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1241))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_104| 28) |~#a~0.offset|) v_ArrVal_1245))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1248) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0) (< |v_t_funThread2of2ForFork0_~i~0#1_111| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_111|)))) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1241 (Array Int Int))) (or (forall ((v_ArrVal_1248 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_104| Int) (|~#a~0.offset| Int) (v_ArrVal_1245 Int)) (or (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1241))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_104| 28) |~#a~0.offset|) v_ArrVal_1245))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1248) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_104| |v_t_funThread2of2ForFork0_~i~0#1_111|))) (< |v_t_funThread2of2ForFork0_~i~0#1_111| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_111|)))) is different from false [2023-08-29 22:02:12,462 WARN L222 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:02:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-08-29 22:02:12,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397604918] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:02:12,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:02:12,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 21 [2023-08-29 22:02:12,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9682333] [2023-08-29 22:02:12,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:02:12,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 22:02:12,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:02:12,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 22:02:12,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=273, Unknown=5, NotChecked=114, Total=506 [2023-08-29 22:02:13,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 569 [2023-08-29 22:02:13,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 118 transitions, 911 flow. Second operand has 23 states, 23 states have (on average 151.2173913043478) internal successors, (3478), 23 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states 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 22:02:13,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:02:13,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 569 [2023-08-29 22:02:13,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:02:13,841 INFO L130 PetriNetUnfolder]: 1207/2475 cut-off events. [2023-08-29 22:02:13,842 INFO L131 PetriNetUnfolder]: For 8207/8225 co-relation queries the response was YES. [2023-08-29 22:02:13,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9116 conditions, 2475 events. 1207/2475 cut-off events. For 8207/8225 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17255 event pairs, 123 based on Foata normal form. 3/2218 useless extension candidates. Maximal degree in co-relation 9028. Up to 1265 conditions per place. [2023-08-29 22:02:13,852 INFO L137 encePairwiseOnDemand]: 561/569 looper letters, 124 selfloop transitions, 22 changer transitions 14/166 dead transitions. [2023-08-29 22:02:13,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 166 transitions, 1476 flow [2023-08-29 22:02:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:02:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:02:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1430 transitions. [2023-08-29 22:02:13,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2792423354813513 [2023-08-29 22:02:13,855 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1430 transitions. [2023-08-29 22:02:13,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1430 transitions. [2023-08-29 22:02:13,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:02:13,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1430 transitions. [2023-08-29 22:02:13,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.88888888888889) internal successors, (1430), 9 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states 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 22:02:13,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:02:13,861 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:02:13,861 INFO L175 Difference]: Start difference. First operand has 144 places, 118 transitions, 911 flow. Second operand 9 states and 1430 transitions. [2023-08-29 22:02:13,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 166 transitions, 1476 flow [2023-08-29 22:02:13,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 166 transitions, 1370 flow, removed 30 selfloop flow, removed 20 redundant places. [2023-08-29 22:02:13,885 INFO L231 Difference]: Finished difference. Result has 134 places, 120 transitions, 878 flow [2023-08-29 22:02:13,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=878, PETRI_PLACES=134, PETRI_TRANSITIONS=120} [2023-08-29 22:02:13,886 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 31 predicate places. [2023-08-29 22:02:13,886 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 120 transitions, 878 flow [2023-08-29 22:02:13,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 151.2173913043478) internal successors, (3478), 23 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states 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 22:02:13,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:13,887 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:02:13,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-29 22:02:14,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:14,093 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:02:14,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1737245270, now seen corresponding path program 5 times [2023-08-29 22:02:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:14,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899915889] [2023-08-29 22:02:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:14,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-29 22:02:14,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:02:14,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899915889] [2023-08-29 22:02:14,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899915889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:02:14,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053735990] [2023-08-29 22:02:14,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 22:02:14,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:14,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:02:14,453 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:02:14,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-29 22:02:14,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-29 22:02:14,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:02:14,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-29 22:02:14,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:02:14,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:02:14,814 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:14,814 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 22:02:14,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:02:14,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:02:14,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:02:14,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:02:14,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:02:15,043 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:15,043 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 25 treesize of output 11 [2023-08-29 22:02:15,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:02:15,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 22 [2023-08-29 22:02:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-29 22:02:15,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:02:15,181 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1339 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1339) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28))))) is different from false [2023-08-29 22:02:15,280 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1339 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_113| Int) (v_ArrVal_1336 (Array Int Int)) (v_ArrVal_1338 Int)) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_113| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1336) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0)) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) v_ArrVal_1338)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1339) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0)))) is different from false [2023-08-29 22:02:15,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:02:15,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:02:15,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:02:15,322 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 48 treesize of output 38 [2023-08-29 22:02:15,327 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 25 treesize of output 18 [2023-08-29 22:02:17,361 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((v_ArrVal_1339 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_113| Int) (|v_t_funThread1of2ForFork0_~i~0#1_106| Int) (|~#a~0.offset| Int) (v_ArrVal_1338 Int)) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ |~#a~0.offset| (* |v_t_funThread1of2ForFork0_~i~0#1_106| 28)) v_ArrVal_1338)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1339) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_113| 28) |~#a~0.offset|)) 0) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_106|) (< |v_t_funThread1of2ForFork0_~i~0#1_106| 1)))) (forall ((|v_t_funThread1of2ForFork0_~i~0#1_106| Int)) (or (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_106|) (< |v_t_funThread1of2ForFork0_~i~0#1_106| 1) (forall ((v_ArrVal_1339 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_113| Int) (|~#a~0.offset| Int) (v_ArrVal_1338 Int)) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ |~#a~0.offset| (* |v_t_funThread1of2ForFork0_~i~0#1_106| 28)) v_ArrVal_1338)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1339) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_113| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_106| |v_t_funThread2of2ForFork0_~i~0#1_113|))))))) is different from false [2023-08-29 22:02:19,492 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1339 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_113| Int) (|v_t_funThread1of2ForFork0_~i~0#1_106| Int) (v_ArrVal_1333 (Array Int Int)) (|~#a~0.offset| Int) (v_ArrVal_1338 Int)) (or (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_106|) (< |v_t_funThread1of2ForFork0_~i~0#1_106| 1) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1333))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ |~#a~0.offset| (* |v_t_funThread1of2ForFork0_~i~0#1_106| 28)) v_ArrVal_1338))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1339) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_113| 28) |~#a~0.offset|)) 0))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) (forall ((|v_t_funThread1of2ForFork0_~i~0#1_106| Int) (v_ArrVal_1333 (Array Int Int))) (or (forall ((v_ArrVal_1339 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_113| Int) (|~#a~0.offset| Int) (v_ArrVal_1338 Int)) (or (= |v_t_funThread1of2ForFork0_~i~0#1_106| |v_t_funThread2of2ForFork0_~i~0#1_113|) (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1333))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ |~#a~0.offset| (* |v_t_funThread1of2ForFork0_~i~0#1_106| 28)) v_ArrVal_1338))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1339) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_113| 28) |~#a~0.offset|)) 0))) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_106|) (< |v_t_funThread1of2ForFork0_~i~0#1_106| 1)))) is different from false [2023-08-29 22:02:25,449 WARN L222 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:02:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-08-29 22:02:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053735990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:02:25,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:02:25,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 21 [2023-08-29 22:02:25,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963083219] [2023-08-29 22:02:25,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:02:25,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 22:02:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:02:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 22:02:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=256, Unknown=5, NotChecked=148, Total=506 [2023-08-29 22:02:25,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 569 [2023-08-29 22:02:25,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 120 transitions, 878 flow. Second operand has 23 states, 23 states have (on average 151.30434782608697) internal successors, (3480), 23 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states 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 22:02:25,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:02:25,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 569 [2023-08-29 22:02:25,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:02:28,814 INFO L130 PetriNetUnfolder]: 1302/2686 cut-off events. [2023-08-29 22:02:28,815 INFO L131 PetriNetUnfolder]: For 10121/10139 co-relation queries the response was YES. [2023-08-29 22:02:28,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10026 conditions, 2686 events. 1302/2686 cut-off events. For 10121/10139 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19272 event pairs, 266 based on Foata normal form. 10/2411 useless extension candidates. Maximal degree in co-relation 9959. Up to 1454 conditions per place. [2023-08-29 22:02:28,826 INFO L137 encePairwiseOnDemand]: 556/569 looper letters, 111 selfloop transitions, 13 changer transitions 63/193 dead transitions. [2023-08-29 22:02:28,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 193 transitions, 1628 flow [2023-08-29 22:02:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 22:02:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 22:02:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1750 transitions. [2023-08-29 22:02:28,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2795973797731267 [2023-08-29 22:02:28,829 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1750 transitions. [2023-08-29 22:02:28,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1750 transitions. [2023-08-29 22:02:28,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:02:28,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1750 transitions. [2023-08-29 22:02:28,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 159.0909090909091) internal successors, (1750), 11 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states 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 22:02:28,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 569.0) internal successors, (6828), 12 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states 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 22:02:28,833 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 569.0) internal successors, (6828), 12 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states 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 22:02:28,833 INFO L175 Difference]: Start difference. First operand has 134 places, 120 transitions, 878 flow. Second operand 11 states and 1750 transitions. [2023-08-29 22:02:28,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 193 transitions, 1628 flow [2023-08-29 22:02:28,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 193 transitions, 1594 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-29 22:02:28,858 INFO L231 Difference]: Finished difference. Result has 142 places, 107 transitions, 781 flow [2023-08-29 22:02:28,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=781, PETRI_PLACES=142, PETRI_TRANSITIONS=107} [2023-08-29 22:02:28,859 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 39 predicate places. [2023-08-29 22:02:28,859 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 107 transitions, 781 flow [2023-08-29 22:02:28,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 151.30434782608697) internal successors, (3480), 23 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states 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 22:02:28,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:28,860 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:02:28,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-29 22:02:29,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-29 22:02:29,066 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:02:29,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2038880223, now seen corresponding path program 4 times [2023-08-29 22:02:29,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:29,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399529055] [2023-08-29 22:02:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:29,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-08-29 22:02:29,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:02:29,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399529055] [2023-08-29 22:02:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399529055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:02:29,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757815121] [2023-08-29 22:02:29,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:02:29,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:02:29,449 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:02:29,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-29 22:02:29,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:02:29,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:02:29,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-29 22:02:29,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:02:29,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:02:29,638 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:29,639 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 22:02:29,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:02:29,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:02:29,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:02:29,734 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:29,734 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 25 treesize of output 11 [2023-08-29 22:02:29,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:02:29,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 22 [2023-08-29 22:02:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-08-29 22:02:29,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:02:30,088 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 21 treesize of output 19 [2023-08-29 22:02:30,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 21 treesize of output 19 [2023-08-29 22:02:30,102 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 15 treesize of output 8 [2023-08-29 22:02:36,155 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1424 (Array Int Int)) (|~#a~0.offset| Int) (|v_t_funThread1of2ForFork0_~i~0#1_108| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1424) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_108| 28) |~#a~0.offset|)) 0)) (not (= |c_~#a~0.base| |c_ULTIMATE.start_main_~#t_ids~0#1.base|))) is different from false [2023-08-29 22:02:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-08-29 22:02:36,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757815121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:02:36,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:02:36,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 16 [2023-08-29 22:02:36,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943366142] [2023-08-29 22:02:36,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:02:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 22:02:36,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:02:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 22:02:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=4, NotChecked=30, Total=306 [2023-08-29 22:02:36,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 569 [2023-08-29 22:02:36,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 107 transitions, 781 flow. Second operand has 18 states, 18 states have (on average 152.88888888888889) internal successors, (2752), 18 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states 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 22:02:36,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:02:36,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 569 [2023-08-29 22:02:36,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:02:36,950 INFO L130 PetriNetUnfolder]: 1033/2173 cut-off events. [2023-08-29 22:02:36,950 INFO L131 PetriNetUnfolder]: For 8627/8639 co-relation queries the response was YES. [2023-08-29 22:02:36,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8558 conditions, 2173 events. 1033/2173 cut-off events. For 8627/8639 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15047 event pairs, 236 based on Foata normal form. 4/1949 useless extension candidates. Maximal degree in co-relation 8487. Up to 1304 conditions per place. [2023-08-29 22:02:36,960 INFO L137 encePairwiseOnDemand]: 560/569 looper letters, 99 selfloop transitions, 8 changer transitions 45/158 dead transitions. [2023-08-29 22:02:36,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 158 transitions, 1307 flow [2023-08-29 22:02:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:02:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:02:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1444 transitions. [2023-08-29 22:02:36,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28197617652802187 [2023-08-29 22:02:36,962 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1444 transitions. [2023-08-29 22:02:36,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1444 transitions. [2023-08-29 22:02:36,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:02:36,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1444 transitions. [2023-08-29 22:02:36,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.44444444444446) internal successors, (1444), 9 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 22:02:36,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:02:36,966 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:02:36,966 INFO L175 Difference]: Start difference. First operand has 142 places, 107 transitions, 781 flow. Second operand 9 states and 1444 transitions. [2023-08-29 22:02:36,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 158 transitions, 1307 flow [2023-08-29 22:02:36,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 158 transitions, 1263 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-08-29 22:02:36,983 INFO L231 Difference]: Finished difference. Result has 134 places, 100 transitions, 697 flow [2023-08-29 22:02:36,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=697, PETRI_PLACES=134, PETRI_TRANSITIONS=100} [2023-08-29 22:02:36,983 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 31 predicate places. [2023-08-29 22:02:36,984 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 100 transitions, 697 flow [2023-08-29 22:02:36,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 152.88888888888889) internal successors, (2752), 18 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states 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 22:02:36,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:36,984 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:02:36,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-29 22:02:37,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-29 22:02:37,189 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:02:37,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:37,189 INFO L85 PathProgramCache]: Analyzing trace with hash 940176270, now seen corresponding path program 6 times [2023-08-29 22:02:37,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:37,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044464033] [2023-08-29 22:02:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:37,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:02:39,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:02:39,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044464033] [2023-08-29 22:02:39,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044464033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:02:39,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208122785] [2023-08-29 22:02:39,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 22:02:39,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:39,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:02:39,809 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:02:39,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-29 22:02:40,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-29 22:02:40,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:02:40,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-29 22:02:40,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:02:40,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:02:40,129 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:40,129 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 22:02:40,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:02:40,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:02:40,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:02:40,247 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:40,248 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 25 treesize of output 11 [2023-08-29 22:02:40,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:02:40,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 22 [2023-08-29 22:02:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-29 22:02:40,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:02:40,645 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 21 treesize of output 19 [2023-08-29 22:02:40,649 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 15 treesize of output 8 [2023-08-29 22:02:42,658 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1518 Int) (|v_t_funThread2of2ForFork0_~i~0#1_117| Int) (|~#a~0.offset| Int) (|v_t_funThread1of2ForFork0_~i~0#1_110| Int) (v_ArrVal_1519 (Array Int Int))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_117| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_117|) (= |v_t_funThread1of2ForFork0_~i~0#1_110| |v_t_funThread2of2ForFork0_~i~0#1_117|) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_110| 28) |~#a~0.offset|) v_ArrVal_1518)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1519) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_117| 28) |~#a~0.offset|)) 0))) is different from false [2023-08-29 22:02:44,688 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1518 Int) (v_ArrVal_1514 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_117| Int) (|~#a~0.offset| Int) (|v_t_funThread1of2ForFork0_~i~0#1_110| Int) (v_ArrVal_1519 (Array Int Int))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_117| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_117|) (= |v_t_funThread1of2ForFork0_~i~0#1_110| |v_t_funThread2of2ForFork0_~i~0#1_117|) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1514))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_110| 28) |~#a~0.offset|) v_ArrVal_1518))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1519) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_117| 28) |~#a~0.offset|)) 0))) is different from false [2023-08-29 22:02:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-08-29 22:02:44,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208122785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:02:44,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:02:44,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 7] total 28 [2023-08-29 22:02:44,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781963904] [2023-08-29 22:02:44,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:02:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 22:02:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:02:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 22:02:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=617, Unknown=7, NotChecked=106, Total=870 [2023-08-29 22:02:45,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 569 [2023-08-29 22:02:45,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 100 transitions, 697 flow. Second operand has 30 states, 30 states have (on average 146.13333333333333) internal successors, (4384), 30 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states 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 22:02:45,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:02:45,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 569 [2023-08-29 22:02:45,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:02:46,684 INFO L130 PetriNetUnfolder]: 823/1781 cut-off events. [2023-08-29 22:02:46,684 INFO L131 PetriNetUnfolder]: For 6946/6958 co-relation queries the response was YES. [2023-08-29 22:02:46,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7070 conditions, 1781 events. 823/1781 cut-off events. For 6946/6958 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12131 event pairs, 215 based on Foata normal form. 4/1614 useless extension candidates. Maximal degree in co-relation 7008. Up to 1094 conditions per place. [2023-08-29 22:02:46,693 INFO L137 encePairwiseOnDemand]: 559/569 looper letters, 80 selfloop transitions, 16 changer transitions 45/147 dead transitions. [2023-08-29 22:02:46,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 147 transitions, 1204 flow [2023-08-29 22:02:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 22:02:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 22:02:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2692 transitions. [2023-08-29 22:02:46,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2628392892013279 [2023-08-29 22:02:46,696 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2692 transitions. [2023-08-29 22:02:46,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2692 transitions. [2023-08-29 22:02:46,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:02:46,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2692 transitions. [2023-08-29 22:02:46,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 149.55555555555554) internal successors, (2692), 18 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states 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 22:02:46,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 569.0) internal successors, (10811), 19 states have internal predecessors, (10811), 0 states have call successors, (0), 0 states 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 22:02:46,707 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 569.0) internal successors, (10811), 19 states have internal predecessors, (10811), 0 states have call successors, (0), 0 states 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 22:02:46,707 INFO L175 Difference]: Start difference. First operand has 134 places, 100 transitions, 697 flow. Second operand 18 states and 2692 transitions. [2023-08-29 22:02:46,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 147 transitions, 1204 flow [2023-08-29 22:02:46,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 147 transitions, 1165 flow, removed 10 selfloop flow, removed 10 redundant places. [2023-08-29 22:02:46,723 INFO L231 Difference]: Finished difference. Result has 136 places, 93 transitions, 635 flow [2023-08-29 22:02:46,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=635, PETRI_PLACES=136, PETRI_TRANSITIONS=93} [2023-08-29 22:02:46,723 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 33 predicate places. [2023-08-29 22:02:46,724 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 93 transitions, 635 flow [2023-08-29 22:02:46,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 146.13333333333333) internal successors, (4384), 30 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states 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 22:02:46,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:46,724 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:02:46,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-29 22:02:46,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:46,930 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:02:46,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:46,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1647315231, now seen corresponding path program 5 times [2023-08-29 22:02:46,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:46,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683165174] [2023-08-29 22:02:46,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:46,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-29 22:02:47,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:02:47,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683165174] [2023-08-29 22:02:47,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683165174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:02:47,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676743354] [2023-08-29 22:02:47,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 22:02:47,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:47,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:02:47,285 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:02:47,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-29 22:02:47,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-29 22:02:47,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:02:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-29 22:02:47,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:02:47,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:02:47,690 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:47,690 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 22:02:47,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:02:47,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:02:47,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:02:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:02:47,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:02:47,916 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:02:47,917 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 25 treesize of output 11 [2023-08-29 22:02:47,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:02:48,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 22 [2023-08-29 22:02:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-29 22:02:48,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:02:48,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:02:48,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:02:48,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:02:48,264 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 48 treesize of output 38 [2023-08-29 22:02:48,269 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 25 treesize of output 18 [2023-08-29 22:02:50,321 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_119| Int)) (or (forall ((v_ArrVal_1608 Int) (|v_t_funThread1of2ForFork0_~i~0#1_112| Int) (v_ArrVal_1610 (Array Int Int)) (|~#a~0.offset| Int)) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_119| 28) |~#a~0.offset|) v_ArrVal_1608)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1610) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_112| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_112| |v_t_funThread2of2ForFork0_~i~0#1_119|))) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_119|) (< |v_t_funThread2of2ForFork0_~i~0#1_119| 1))) (or (forall ((v_ArrVal_1608 Int) (|v_t_funThread1of2ForFork0_~i~0#1_112| Int) (v_ArrVal_1610 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_119| Int) (|~#a~0.offset| Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_119|) (< |v_t_funThread2of2ForFork0_~i~0#1_119| 1) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_119| 28) |~#a~0.offset|) v_ArrVal_1608)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1610) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_112| 28) |~#a~0.offset|)) 0))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))))) is different from false [2023-08-29 22:02:52,420 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1604 (Array Int Int)) (v_ArrVal_1608 Int) (|v_t_funThread1of2ForFork0_~i~0#1_112| Int) (v_ArrVal_1610 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_119| Int) (|~#a~0.offset| Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_119|) (< |v_t_funThread2of2ForFork0_~i~0#1_119| 1) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1604))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_119| 28) |~#a~0.offset|) v_ArrVal_1608))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1610) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_112| 28) |~#a~0.offset|)) 0))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) (forall ((v_ArrVal_1604 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_119| Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_119|) (< |v_t_funThread2of2ForFork0_~i~0#1_119| 1) (forall ((v_ArrVal_1608 Int) (|v_t_funThread1of2ForFork0_~i~0#1_112| Int) (v_ArrVal_1610 (Array Int Int)) (|~#a~0.offset| Int)) (or (= |v_t_funThread1of2ForFork0_~i~0#1_112| |v_t_funThread2of2ForFork0_~i~0#1_119|) (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1604))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_119| 28) |~#a~0.offset|) v_ArrVal_1608))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1610) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_112| 28) |~#a~0.offset|)) 0)))))) is different from false [2023-08-29 22:03:00,627 WARN L222 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:03:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-08-29 22:03:01,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676743354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:01,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:01,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 21 [2023-08-29 22:03:01,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408882833] [2023-08-29 22:03:01,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:01,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 22:03:01,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 22:03:01,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=311, Unknown=7, NotChecked=78, Total=506 [2023-08-29 22:03:01,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 569 [2023-08-29 22:03:01,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 93 transitions, 635 flow. Second operand has 23 states, 23 states have (on average 151.3913043478261) internal successors, (3482), 23 states have internal predecessors, (3482), 0 states have call successors, (0), 0 states 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 22:03:01,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:01,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 569 [2023-08-29 22:03:01,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:01,817 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_~#a~0.base|)) (.cse2 (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28)))) (and (forall ((v_ArrVal_1608 Int) (|v_t_funThread1of2ForFork0_~i~0#1_112| Int) (v_ArrVal_1610 (Array Int Int)) (v_ArrVal_1607 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_112| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1607) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0)) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse1 .cse2 v_ArrVal_1608)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1610) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0)))) (forall ((v_ArrVal_1608 Int) (|v_t_funThread1of2ForFork0_~i~0#1_112| Int) (v_ArrVal_1610 (Array Int Int))) (let ((.cse3 (* |v_t_funThread1of2ForFork0_~i~0#1_112| 28))) (or (not (= (select (select |c_#pthreadsMutex| |c_~#a~0.base|) (+ .cse3 |c_~#a~0.offset| (- 24))) 0)) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse1 .cse2 v_ArrVal_1608)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1610) |c_~#a~0.base|) (+ .cse3 |c_~#a~0.offset|)) 0)))) (forall ((v_ArrVal_1608 Int) (v_ArrVal_1610 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse1 .cse2 v_ArrVal_1608)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1610) |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|)) 0)))) is different from false [2023-08-29 22:03:04,377 WARN L539 Checker$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 22:03:04,690 INFO L130 PetriNetUnfolder]: 872/1931 cut-off events. [2023-08-29 22:03:04,690 INFO L131 PetriNetUnfolder]: For 7164/7188 co-relation queries the response was YES. [2023-08-29 22:03:04,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7414 conditions, 1931 events. 872/1931 cut-off events. For 7164/7188 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13585 event pairs, 231 based on Foata normal form. 13/1759 useless extension candidates. Maximal degree in co-relation 7337. Up to 864 conditions per place. [2023-08-29 22:03:04,697 INFO L137 encePairwiseOnDemand]: 554/569 looper letters, 87 selfloop transitions, 16 changer transitions 79/188 dead transitions. [2023-08-29 22:03:04,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 188 transitions, 1465 flow [2023-08-29 22:03:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 22:03:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 22:03:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2522 transitions. [2023-08-29 22:03:04,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27702108963093147 [2023-08-29 22:03:04,701 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2522 transitions. [2023-08-29 22:03:04,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2522 transitions. [2023-08-29 22:03:04,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:04,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2522 transitions. [2023-08-29 22:03:04,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 157.625) internal successors, (2522), 16 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states 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 22:03:04,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 569.0) internal successors, (9673), 17 states have internal predecessors, (9673), 0 states have call successors, (0), 0 states 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 22:03:04,710 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 569.0) internal successors, (9673), 17 states have internal predecessors, (9673), 0 states have call successors, (0), 0 states 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 22:03:04,710 INFO L175 Difference]: Start difference. First operand has 136 places, 93 transitions, 635 flow. Second operand 16 states and 2522 transitions. [2023-08-29 22:03:04,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 188 transitions, 1465 flow [2023-08-29 22:03:04,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 188 transitions, 1403 flow, removed 15 selfloop flow, removed 18 redundant places. [2023-08-29 22:03:04,730 INFO L231 Difference]: Finished difference. Result has 136 places, 92 transitions, 649 flow [2023-08-29 22:03:04,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=649, PETRI_PLACES=136, PETRI_TRANSITIONS=92} [2023-08-29 22:03:04,731 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 33 predicate places. [2023-08-29 22:03:04,731 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 92 transitions, 649 flow [2023-08-29 22:03:04,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 151.3913043478261) internal successors, (3482), 23 states have internal predecessors, (3482), 0 states have call successors, (0), 0 states 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 22:03:04,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:04,732 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:04,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:04,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:04,938 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:04,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1231922403, now seen corresponding path program 6 times [2023-08-29 22:03:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:04,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402506146] [2023-08-29 22:03:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:04,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-29 22:03:07,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402506146] [2023-08-29 22:03:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402506146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180716113] [2023-08-29 22:03:07,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 22:03:07,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:07,734 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:03:07,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-29 22:03:08,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-29 22:03:08,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:03:08,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-29 22:03:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:08,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:03:08,236 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-08-29 22:03:08,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2023-08-29 22:03:08,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-29 22:03:08,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-29 22:03:08,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:03:08,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:08,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:03:08,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:03:08,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-29 22:03:08,709 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:03:08,710 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 25 treesize of output 11 [2023-08-29 22:03:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-29 22:03:08,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:09,039 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_~i~0#1_114| Int) (v_ArrVal_1701 (Array Int Int)) (v_ArrVal_1698 (Array Int Int)) (v_ArrVal_1699 Int)) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_114| 28))) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28)) v_ArrVal_1699)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1701) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1698) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0))))) is different from false [2023-08-29 22:03:09,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:09,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:03:09,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:09,080 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 48 treesize of output 38 [2023-08-29 22:03:09,087 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 25 treesize of output 18 [2023-08-29 22:03:11,131 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_121| Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_121|) (forall ((|v_t_funThread1of2ForFork0_~i~0#1_114| Int) (v_ArrVal_1701 (Array Int Int)) (|~#a~0.offset| Int) (v_ArrVal_1699 Int)) (or (= |v_t_funThread1of2ForFork0_~i~0#1_114| |v_t_funThread2of2ForFork0_~i~0#1_121|) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_121| 28) |~#a~0.offset|) v_ArrVal_1699)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1701) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_114| 28) |~#a~0.offset|)) 0))) (< |v_t_funThread2of2ForFork0_~i~0#1_121| 1))) (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_121| Int) (|v_t_funThread1of2ForFork0_~i~0#1_114| Int) (v_ArrVal_1701 (Array Int Int)) (|~#a~0.offset| Int) (v_ArrVal_1699 Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_121|) (< |v_t_funThread2of2ForFork0_~i~0#1_121| 1) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_121| 28) |~#a~0.offset|) v_ArrVal_1699)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1701) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_114| 28) |~#a~0.offset|)) 0)))))) is different from false [2023-08-29 22:03:13,231 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_121| Int) (v_ArrVal_1695 (Array Int Int))) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_121|) (forall ((|v_t_funThread1of2ForFork0_~i~0#1_114| Int) (v_ArrVal_1701 (Array Int Int)) (|~#a~0.offset| Int) (v_ArrVal_1699 Int)) (or (= |v_t_funThread1of2ForFork0_~i~0#1_114| |v_t_funThread2of2ForFork0_~i~0#1_121|) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1695))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_121| 28) |~#a~0.offset|) v_ArrVal_1699))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1701) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_114| 28) |~#a~0.offset|)) 0))) (< |v_t_funThread2of2ForFork0_~i~0#1_121| 1))) (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_121| Int) (|v_t_funThread1of2ForFork0_~i~0#1_114| Int) (v_ArrVal_1701 (Array Int Int)) (v_ArrVal_1695 (Array Int Int)) (|~#a~0.offset| Int) (v_ArrVal_1699 Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_121|) (< |v_t_funThread2of2ForFork0_~i~0#1_121| 1) (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1695))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_121| 28) |~#a~0.offset|) v_ArrVal_1699))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1701) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_114| 28) |~#a~0.offset|)) 0))))) is different from false [2023-08-29 22:03:20,096 WARN L222 SmtUtils]: Spent 6.65s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:03:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-08-29 22:03:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180716113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:20,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:20,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 8] total 31 [2023-08-29 22:03:20,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420943803] [2023-08-29 22:03:20,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:20,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-29 22:03:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-29 22:03:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=691, Unknown=5, NotChecked=174, Total=1056 [2023-08-29 22:03:20,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 569 [2023-08-29 22:03:20,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 92 transitions, 649 flow. Second operand has 33 states, 33 states have (on average 142.84848484848484) internal successors, (4714), 33 states have internal predecessors, (4714), 0 states have call successors, (0), 0 states 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 22:03:20,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:20,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 569 [2023-08-29 22:03:20,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:23,093 INFO L130 PetriNetUnfolder]: 544/1224 cut-off events. [2023-08-29 22:03:23,093 INFO L131 PetriNetUnfolder]: For 6017/6017 co-relation queries the response was YES. [2023-08-29 22:03:23,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5464 conditions, 1224 events. 544/1224 cut-off events. For 6017/6017 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7797 event pairs, 163 based on Foata normal form. 1/1123 useless extension candidates. Maximal degree in co-relation 5391. Up to 861 conditions per place. [2023-08-29 22:03:23,099 INFO L137 encePairwiseOnDemand]: 557/569 looper letters, 78 selfloop transitions, 28 changer transitions 11/123 dead transitions. [2023-08-29 22:03:23,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 123 transitions, 1070 flow [2023-08-29 22:03:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-29 22:03:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-29 22:03:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2761 transitions. [2023-08-29 22:03:23,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2553880307094626 [2023-08-29 22:03:23,102 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2761 transitions. [2023-08-29 22:03:23,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2761 transitions. [2023-08-29 22:03:23,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:23,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2761 transitions. [2023-08-29 22:03:23,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 145.31578947368422) internal successors, (2761), 19 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states 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 22:03:23,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 569.0) internal successors, (11380), 20 states have internal predecessors, (11380), 0 states have call successors, (0), 0 states 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 22:03:23,109 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 569.0) internal successors, (11380), 20 states have internal predecessors, (11380), 0 states have call successors, (0), 0 states 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 22:03:23,109 INFO L175 Difference]: Start difference. First operand has 136 places, 92 transitions, 649 flow. Second operand 19 states and 2761 transitions. [2023-08-29 22:03:23,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 123 transitions, 1070 flow [2023-08-29 22:03:23,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 123 transitions, 1025 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-29 22:03:23,119 INFO L231 Difference]: Finished difference. Result has 136 places, 95 transitions, 705 flow [2023-08-29 22:03:23,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=705, PETRI_PLACES=136, PETRI_TRANSITIONS=95} [2023-08-29 22:03:23,120 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 33 predicate places. [2023-08-29 22:03:23,120 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 95 transitions, 705 flow [2023-08-29 22:03:23,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 142.84848484848484) internal successors, (4714), 33 states have internal predecessors, (4714), 0 states have call successors, (0), 0 states 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 22:03:23,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:23,121 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:23,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:23,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-29 22:03:23,321 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:23,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:23,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1309676913, now seen corresponding path program 7 times [2023-08-29 22:03:23,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:23,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756122118] [2023-08-29 22:03:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:23,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-29 22:03:23,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:23,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756122118] [2023-08-29 22:03:23,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756122118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:23,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932018894] [2023-08-29 22:03:23,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 22:03:23,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:23,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:23,901 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:03:23,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-29 22:03:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:24,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-29 22:03:24,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:24,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:03:24,198 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:03:24,198 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 22:03:24,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:03:24,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:03:24,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-29 22:03:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:24,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:03:24,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-29 22:03:24,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 22 [2023-08-29 22:03:24,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:24,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-08-29 22:03:24,535 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:03:24,535 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 25 treesize of output 11 [2023-08-29 22:03:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-29 22:03:24,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:24,634 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_~i~0#1_116| Int) (v_ArrVal_1793 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_116| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1793) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0)) (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_116|) (< |v_t_funThread1of2ForFork0_~i~0#1_116| 1)))) is different from false [2023-08-29 22:03:24,648 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_~i~0#1_116| Int) (v_ArrVal_1793 (Array Int Int)) (v_ArrVal_1792 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_116| 28))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1792) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1793) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0)) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_116|) (< |v_t_funThread1of2ForFork0_~i~0#1_116| 1)))) is different from false [2023-08-29 22:03:24,663 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1791 Int) (|v_t_funThread1of2ForFork0_~i~0#1_116| Int) (v_ArrVal_1793 (Array Int Int)) (v_ArrVal_1792 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_116| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1793) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0)) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28)) v_ArrVal_1791)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1792) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_116|) (< |v_t_funThread1of2ForFork0_~i~0#1_116| 1)))) is different from false [2023-08-29 22:03:24,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:24,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2023-08-29 22:03:24,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:24,736 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 48 treesize of output 38 [2023-08-29 22:03:24,741 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 25 treesize of output 18 [2023-08-29 22:03:26,786 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (forall ((|v_t_funThread1of2ForFork0_~i~0#1_116| Int)) (or (forall ((|v_t_funThread2of2ForFork0_~i~0#1_123| Int) (v_ArrVal_1791 Int) (|~#a~0.offset| Int) (v_ArrVal_1792 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_123| 28) |~#a~0.offset|) v_ArrVal_1791)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1792) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_116| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_116| |v_t_funThread2of2ForFork0_~i~0#1_123|))) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_116|) (< |v_t_funThread1of2ForFork0_~i~0#1_116| 1))) (or (forall ((|v_t_funThread2of2ForFork0_~i~0#1_123| Int) (v_ArrVal_1791 Int) (|v_t_funThread1of2ForFork0_~i~0#1_116| Int) (|~#a~0.offset| Int) (v_ArrVal_1792 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_123| 28) |~#a~0.offset|) v_ArrVal_1791)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1792) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_116| 28) |~#a~0.offset|)) 0) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_116|) (< |v_t_funThread1of2ForFork0_~i~0#1_116| 1))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))))) is different from false [2023-08-29 22:03:28,885 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((|v_t_funThread2of2ForFork0_~i~0#1_123| Int) (v_ArrVal_1786 (Array Int Int)) (v_ArrVal_1791 Int) (|v_t_funThread1of2ForFork0_~i~0#1_116| Int) (|~#a~0.offset| Int) (v_ArrVal_1792 (Array Int Int))) (or (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1786))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_123| 28) |~#a~0.offset|) v_ArrVal_1791))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1792) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_116| 28) |~#a~0.offset|)) 0) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_116|) (< |v_t_funThread1of2ForFork0_~i~0#1_116| 1))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) (forall ((v_ArrVal_1786 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_116| Int)) (or (forall ((|v_t_funThread2of2ForFork0_~i~0#1_123| Int) (v_ArrVal_1791 Int) (|~#a~0.offset| Int) (v_ArrVal_1792 (Array Int Int))) (or (= |v_t_funThread1of2ForFork0_~i~0#1_116| |v_t_funThread2of2ForFork0_~i~0#1_123|) (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1786))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_123| 28) |~#a~0.offset|) v_ArrVal_1791))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1792) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_116| 28) |~#a~0.offset|)) 0))) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_116|) (< |v_t_funThread1of2ForFork0_~i~0#1_116| 1)))) is different from false [2023-08-29 22:03:35,253 WARN L222 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:03:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-08-29 22:03:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932018894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:35,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:35,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 21 [2023-08-29 22:03:35,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070786876] [2023-08-29 22:03:35,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:35,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 22:03:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 22:03:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=221, Unknown=5, NotChecked=180, Total=506 [2023-08-29 22:03:35,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 569 [2023-08-29 22:03:35,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 95 transitions, 705 flow. Second operand has 23 states, 23 states have (on average 151.30434782608697) internal successors, (3480), 23 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states 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 22:03:35,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:35,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 569 [2023-08-29 22:03:35,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:36,330 INFO L130 PetriNetUnfolder]: 547/1229 cut-off events. [2023-08-29 22:03:36,330 INFO L131 PetriNetUnfolder]: For 5900/5900 co-relation queries the response was YES. [2023-08-29 22:03:36,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5564 conditions, 1229 events. 547/1229 cut-off events. For 5900/5900 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7902 event pairs, 177 based on Foata normal form. 1/1131 useless extension candidates. Maximal degree in co-relation 5485. Up to 787 conditions per place. [2023-08-29 22:03:36,336 INFO L137 encePairwiseOnDemand]: 559/569 looper letters, 87 selfloop transitions, 23 changer transitions 11/127 dead transitions. [2023-08-29 22:03:36,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 127 transitions, 1167 flow [2023-08-29 22:03:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:03:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:03:36,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1412 transitions. [2023-08-29 22:03:36,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2757273969927749 [2023-08-29 22:03:36,338 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1412 transitions. [2023-08-29 22:03:36,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1412 transitions. [2023-08-29 22:03:36,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:36,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1412 transitions. [2023-08-29 22:03:36,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 156.88888888888889) internal successors, (1412), 9 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states 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 22:03:36,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:03:36,342 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 569.0) internal successors, (5690), 10 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 22:03:36,342 INFO L175 Difference]: Start difference. First operand has 136 places, 95 transitions, 705 flow. Second operand 9 states and 1412 transitions. [2023-08-29 22:03:36,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 127 transitions, 1167 flow [2023-08-29 22:03:36,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 127 transitions, 1111 flow, removed 4 selfloop flow, removed 16 redundant places. [2023-08-29 22:03:36,350 INFO L231 Difference]: Finished difference. Result has 131 places, 102 transitions, 806 flow [2023-08-29 22:03:36,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=806, PETRI_PLACES=131, PETRI_TRANSITIONS=102} [2023-08-29 22:03:36,351 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 28 predicate places. [2023-08-29 22:03:36,351 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 102 transitions, 806 flow [2023-08-29 22:03:36,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 151.30434782608697) internal successors, (3480), 23 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states 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 22:03:36,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:36,352 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:36,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:36,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-29 22:03:36,553 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:36,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1208085329, now seen corresponding path program 1 times [2023-08-29 22:03:36,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:36,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650543133] [2023-08-29 22:03:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:03:36,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:36,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650543133] [2023-08-29 22:03:36,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650543133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:36,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961327621] [2023-08-29 22:03:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:36,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:36,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:36,937 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:03:36,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-29 22:03:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:37,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 22:03:37,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:37,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:03:37,176 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:03:37,176 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 22:03:37,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:03:37,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:03:37,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-29 22:03:37,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 48 treesize of output 41 [2023-08-29 22:03:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:03:37,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:04:00,118 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1886 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_125| Int) (|~#a~0.offset| Int) (|t_funThread1of2ForFork0_~i~0#1| Int)) (or (< |v_t_funThread2of2ForFork0_~i~0#1_125| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_125|) (= (select (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1886) |c_~#a~0.base|)) (.cse1 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_125| 28) |~#a~0.offset|)) 0))) is different from false [2023-08-29 22:04:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-29 22:04:00,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961327621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:04:00,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:04:00,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-29 22:04:00,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808174908] [2023-08-29 22:04:00,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:04:00,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 22:04:00,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 22:04:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=401, Unknown=10, NotChecked=42, Total=552 [2023-08-29 22:04:00,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 569 [2023-08-29 22:04:00,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 102 transitions, 806 flow. Second operand has 24 states, 24 states have (on average 170.45833333333334) internal successors, (4091), 24 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states 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 22:04:00,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:00,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 569 [2023-08-29 22:04:00,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:04,472 INFO L130 PetriNetUnfolder]: 578/1353 cut-off events. [2023-08-29 22:04:04,473 INFO L131 PetriNetUnfolder]: For 7770/7776 co-relation queries the response was YES. [2023-08-29 22:04:04,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6264 conditions, 1353 events. 578/1353 cut-off events. For 7770/7776 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9204 event pairs, 162 based on Foata normal form. 18/1257 useless extension candidates. Maximal degree in co-relation 6191. Up to 731 conditions per place. [2023-08-29 22:04:04,483 INFO L137 encePairwiseOnDemand]: 556/569 looper letters, 112 selfloop transitions, 28 changer transitions 15/162 dead transitions. [2023-08-29 22:04:04,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 162 transitions, 1516 flow [2023-08-29 22:04:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:04:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:04:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2114 transitions. [2023-08-29 22:04:04,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096074985354423 [2023-08-29 22:04:04,486 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2114 transitions. [2023-08-29 22:04:04,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2114 transitions. [2023-08-29 22:04:04,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:04,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2114 transitions. [2023-08-29 22:04:04,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 176.16666666666666) internal successors, (2114), 12 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states 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 22:04:04,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 569.0) internal successors, (7397), 13 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states 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 22:04:04,493 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 569.0) internal successors, (7397), 13 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states 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 22:04:04,493 INFO L175 Difference]: Start difference. First operand has 131 places, 102 transitions, 806 flow. Second operand 12 states and 2114 transitions. [2023-08-29 22:04:04,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 162 transitions, 1516 flow [2023-08-29 22:04:04,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 162 transitions, 1466 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-08-29 22:04:04,507 INFO L231 Difference]: Finished difference. Result has 141 places, 114 transitions, 972 flow [2023-08-29 22:04:04,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=972, PETRI_PLACES=141, PETRI_TRANSITIONS=114} [2023-08-29 22:04:04,507 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 38 predicate places. [2023-08-29 22:04:04,508 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 114 transitions, 972 flow [2023-08-29 22:04:04,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 170.45833333333334) internal successors, (4091), 24 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states 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 22:04:04,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:04,508 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:04,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-29 22:04:04,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-29 22:04:04,709 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:04:04,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:04,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1809109636, now seen corresponding path program 1 times [2023-08-29 22:04:04,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:04,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343877355] [2023-08-29 22:04:04,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:04,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:04:05,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343877355] [2023-08-29 22:04:05,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343877355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:04:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579527538] [2023-08-29 22:04:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:05,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:04:05,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:04:05,154 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:04:05,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-29 22:04:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:05,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 22:04:05,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:04:05,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:04:05,439 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:04:05,439 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 22:04:05,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:04:05,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:04:05,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-29 22:04:05,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 48 treesize of output 41 [2023-08-29 22:04:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:04:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:04:28,496 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1983 (Array Int Int)) (|~#a~0.offset| Int) (|t_funThread2of2ForFork0_~i~0#1| Int) (|v_t_funThread1of2ForFork0_~i~0#1_120| Int)) (or (< |v_t_funThread1of2ForFork0_~i~0#1_120| 1) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_120|) (= (select (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1983) |c_~#a~0.base|)) (.cse1 (+ (* 28 |t_funThread2of2ForFork0_~i~0#1|) |~#a~0.offset|))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_120| 28) |~#a~0.offset|)) 0))) is different from false [2023-08-29 22:04:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-29 22:04:28,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579527538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:04:28,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:04:28,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 20 [2023-08-29 22:04:28,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656901050] [2023-08-29 22:04:28,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:04:28,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 22:04:28,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:28,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 22:04:28,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=322, Unknown=11, NotChecked=38, Total=462 [2023-08-29 22:04:30,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:04:32,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:04:34,949 WARN L539 Checker$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 22:04:36,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:04:39,087 WARN L539 Checker$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 22:04:41,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:04:43,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:04:45,234 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 22:04:45,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 569 [2023-08-29 22:04:45,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 114 transitions, 972 flow. Second operand has 22 states, 22 states have (on average 170.77272727272728) internal successors, (3757), 22 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states 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 22:04:45,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:45,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 569 [2023-08-29 22:04:45,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:47,965 INFO L130 PetriNetUnfolder]: 575/1375 cut-off events. [2023-08-29 22:04:47,965 INFO L131 PetriNetUnfolder]: For 8140/8140 co-relation queries the response was YES. [2023-08-29 22:04:47,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6510 conditions, 1375 events. 575/1375 cut-off events. For 8140/8140 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9565 event pairs, 169 based on Foata normal form. 9/1270 useless extension candidates. Maximal degree in co-relation 6433. Up to 812 conditions per place. [2023-08-29 22:04:47,972 INFO L137 encePairwiseOnDemand]: 558/569 looper letters, 111 selfloop transitions, 26 changer transitions 18/162 dead transitions. [2023-08-29 22:04:47,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 162 transitions, 1615 flow [2023-08-29 22:04:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:04:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:04:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1768 transitions. [2023-08-29 22:04:47,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31072056239015816 [2023-08-29 22:04:47,975 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1768 transitions. [2023-08-29 22:04:47,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1768 transitions. [2023-08-29 22:04:47,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:47,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1768 transitions. [2023-08-29 22:04:47,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 176.8) internal successors, (1768), 10 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 22:04:47,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 569.0) internal successors, (6259), 11 states have internal predecessors, (6259), 0 states have call successors, (0), 0 states 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 22:04:47,979 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 569.0) internal successors, (6259), 11 states have internal predecessors, (6259), 0 states have call successors, (0), 0 states 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 22:04:47,979 INFO L175 Difference]: Start difference. First operand has 141 places, 114 transitions, 972 flow. Second operand 10 states and 1768 transitions. [2023-08-29 22:04:47,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 162 transitions, 1615 flow [2023-08-29 22:04:47,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 162 transitions, 1541 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-08-29 22:04:47,994 INFO L231 Difference]: Finished difference. Result has 148 places, 119 transitions, 1051 flow [2023-08-29 22:04:47,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1051, PETRI_PLACES=148, PETRI_TRANSITIONS=119} [2023-08-29 22:04:47,995 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 45 predicate places. [2023-08-29 22:04:47,995 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 119 transitions, 1051 flow [2023-08-29 22:04:47,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 170.77272727272728) internal successors, (3757), 22 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states 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 22:04:47,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:47,995 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:48,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-29 22:04:48,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-29 22:04:48,196 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:04:48,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:48,196 INFO L85 PathProgramCache]: Analyzing trace with hash 70443311, now seen corresponding path program 2 times [2023-08-29 22:04:48,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:48,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646451837] [2023-08-29 22:04:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:48,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:04:48,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:48,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646451837] [2023-08-29 22:04:48,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646451837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:04:48,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954007743] [2023-08-29 22:04:48,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:04:48,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:04:48,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:04:48,641 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:04:48,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-29 22:04:48,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:04:48,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:04:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 22:04:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:04:48,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:04:48,936 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:04:48,937 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 22:04:48,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:04:49,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-29 22:04:49,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 48 treesize of output 41 [2023-08-29 22:04:49,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:04:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 22:04:49,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:05:01,217 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_2084 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2084) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-08-29 22:05:01,227 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_2084 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) (+ (- 1) |c_t_funThread1of2ForFork0_#t~mem39#1|))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2084) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-08-29 22:05:01,234 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_2084 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|)) (.cse1 (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|))) (store .cse0 .cse1 (+ (- 1) (select .cse0 .cse1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2084) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-08-29 22:05:01,248 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_2084 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) |c_t_funThread1of2ForFork0_#t~post37#1|)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2084) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-08-29 22:05:01,254 WARN L839 $PredicateComparison]: unable to prove that (forall ((|~#a~0.offset| Int) (|t_funThread2of2ForFork0_~i~0#1| Int) (|t_funThread1of2ForFork0_~i~0#1| Int) (v_ArrVal_2084 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|)) (.cse1 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store .cse0 .cse1 (select .cse0 .cse1)))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2084) |c_~#a~0.base|) (+ (* 28 |t_funThread2of2ForFork0_~i~0#1|) |~#a~0.offset|)) 0)) is different from false [2023-08-29 22:05:03,292 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2079 (Array Int Int)) (|~#a~0.offset| Int) (|t_funThread2of2ForFork0_~i~0#1| Int) (|t_funThread1of2ForFork0_~i~0#1| Int) (v_ArrVal_2084 (Array Int Int))) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2079))) (store .cse0 |c_~#a~0.base| (let ((.cse1 (select .cse0 |c_~#a~0.base|)) (.cse2 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store .cse1 .cse2 (select .cse1 .cse2))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2084) |c_~#a~0.base|) (+ (* 28 |t_funThread2of2ForFork0_~i~0#1|) |~#a~0.offset|)) 0)) is different from false [2023-08-29 22:05:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-08-29 22:05:03,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954007743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:05:03,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:05:03,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 20 [2023-08-29 22:05:03,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738680238] [2023-08-29 22:05:03,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:05:03,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 22:05:03,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:05:03,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 22:05:03,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=177, Unknown=12, NotChecked=198, Total=462 [2023-08-29 22:05:03,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 569 [2023-08-29 22:05:03,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 119 transitions, 1051 flow. Second operand has 22 states, 22 states have (on average 170.77272727272728) internal successors, (3757), 22 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states 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 22:05:03,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:05:03,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 569 [2023-08-29 22:05:03,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:05:13,567 WARN L222 SmtUtils]: Spent 10.09s on a formula simplification. DAG size of input: 36 DAG size of output: 32 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:05:13,991 INFO L130 PetriNetUnfolder]: 565/1375 cut-off events. [2023-08-29 22:05:13,991 INFO L131 PetriNetUnfolder]: For 6109/6115 co-relation queries the response was YES. [2023-08-29 22:05:13,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6345 conditions, 1375 events. 565/1375 cut-off events. For 6109/6115 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9712 event pairs, 282 based on Foata normal form. 9/1266 useless extension candidates. Maximal degree in co-relation 6270. Up to 478 conditions per place. [2023-08-29 22:05:14,000 INFO L137 encePairwiseOnDemand]: 558/569 looper letters, 65 selfloop transitions, 3 changer transitions 73/145 dead transitions. [2023-08-29 22:05:14,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 145 transitions, 1520 flow [2023-08-29 22:05:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:05:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:05:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1405 transitions. [2023-08-29 22:05:14,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3086555360281195 [2023-08-29 22:05:14,002 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1405 transitions. [2023-08-29 22:05:14,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1405 transitions. [2023-08-29 22:05:14,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:05:14,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1405 transitions. [2023-08-29 22:05:14,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 175.625) internal successors, (1405), 8 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 22:05:14,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 569.0) internal successors, (5121), 9 states have internal predecessors, (5121), 0 states have call successors, (0), 0 states 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 22:05:14,007 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 569.0) internal successors, (5121), 9 states have internal predecessors, (5121), 0 states have call successors, (0), 0 states 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 22:05:14,007 INFO L175 Difference]: Start difference. First operand has 148 places, 119 transitions, 1051 flow. Second operand 8 states and 1405 transitions. [2023-08-29 22:05:14,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 145 transitions, 1520 flow [2023-08-29 22:05:14,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 145 transitions, 1429 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-08-29 22:05:14,019 INFO L231 Difference]: Finished difference. Result has 145 places, 71 transitions, 610 flow [2023-08-29 22:05:14,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=610, PETRI_PLACES=145, PETRI_TRANSITIONS=71} [2023-08-29 22:05:14,020 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 42 predicate places. [2023-08-29 22:05:14,020 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 71 transitions, 610 flow [2023-08-29 22:05:14,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 170.77272727272728) internal successors, (3757), 22 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states 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 22:05:14,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:05:14,021 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:05:14,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-29 22:05:14,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-29 22:05:14,222 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:05:14,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:05:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash -762099699, now seen corresponding path program 2 times [2023-08-29 22:05:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:05:14,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530706282] [2023-08-29 22:05:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:05:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:05:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:05:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-29 22:05:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:05:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530706282] [2023-08-29 22:05:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530706282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:05:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23220745] [2023-08-29 22:05:14,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:05:14,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:05:14,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:05:14,670 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:05:14,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-29 22:05:14,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:05:14,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:05:14,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-29 22:05:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:05:14,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-29 22:05:14,919 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:05:14,919 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 22:05:14,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:05:14,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:05:15,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-29 22:05:15,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 48 treesize of output 41 [2023-08-29 22:05:15,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 22:05:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-29 22:05:15,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:05:15,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23220745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:05:15,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:05:15,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-08-29 22:05:15,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77775191] [2023-08-29 22:05:15,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:05:15,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:05:15,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:05:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:05:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:05:15,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 569 [2023-08-29 22:05:15,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 71 transitions, 610 flow. Second operand has 8 states, 8 states have (on average 214.75) internal successors, (1718), 8 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states 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 22:05:15,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:05:15,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 569 [2023-08-29 22:05:15,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:05:15,800 INFO L130 PetriNetUnfolder]: 135/364 cut-off events. [2023-08-29 22:05:15,800 INFO L131 PetriNetUnfolder]: For 1417/1417 co-relation queries the response was YES. [2023-08-29 22:05:15,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 364 events. 135/364 cut-off events. For 1417/1417 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1773 event pairs, 62 based on Foata normal form. 3/364 useless extension candidates. Maximal degree in co-relation 1771. Up to 173 conditions per place. [2023-08-29 22:05:15,802 INFO L137 encePairwiseOnDemand]: 562/569 looper letters, 0 selfloop transitions, 0 changer transitions 77/77 dead transitions. [2023-08-29 22:05:15,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 77 transitions, 810 flow [2023-08-29 22:05:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:05:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:05:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1516 transitions. [2023-08-29 22:05:15,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806176249058499 [2023-08-29 22:05:15,808 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1516 transitions. [2023-08-29 22:05:15,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1516 transitions. [2023-08-29 22:05:15,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:05:15,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1516 transitions. [2023-08-29 22:05:15,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 216.57142857142858) internal successors, (1516), 7 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states 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 22:05:15,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 569.0) internal successors, (4552), 8 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states 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 22:05:15,811 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 569.0) internal successors, (4552), 8 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states 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 22:05:15,811 INFO L175 Difference]: Start difference. First operand has 145 places, 71 transitions, 610 flow. Second operand 7 states and 1516 transitions. [2023-08-29 22:05:15,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 77 transitions, 810 flow [2023-08-29 22:05:15,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 77 transitions, 733 flow, removed 7 selfloop flow, removed 19 redundant places. [2023-08-29 22:05:15,815 INFO L231 Difference]: Finished difference. Result has 100 places, 0 transitions, 0 flow [2023-08-29 22:05:15,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=100, PETRI_TRANSITIONS=0} [2023-08-29 22:05:15,815 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2023-08-29 22:05:15,815 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 0 transitions, 0 flow [2023-08-29 22:05:15,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 214.75) internal successors, (1718), 8 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states 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 22:05:15,816 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 49 remaining) [2023-08-29 22:05:15,816 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-08-29 22:05:15,816 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-08-29 22:05:15,816 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-08-29 22:05:15,816 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (44 of 49 remaining) [2023-08-29 22:05:15,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (43 of 49 remaining) [2023-08-29 22:05:15,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-08-29 22:05:15,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-08-29 22:05:15,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-08-29 22:05:15,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 49 remaining) [2023-08-29 22:05:15,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-08-29 22:05:15,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-08-29 22:05:15,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 49 remaining) [2023-08-29 22:05:15,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 49 remaining) [2023-08-29 22:05:15,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-08-29 22:05:15,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2023-08-29 22:05:15,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-08-29 22:05:15,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-08-29 22:05:15,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (21 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 49 remaining) [2023-08-29 22:05:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (14 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 49 remaining) [2023-08-29 22:05:15,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-08-29 22:05:15,821 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 49 remaining) [2023-08-29 22:05:15,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-29 22:05:16,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:05:16,021 INFO L445 BasicCegarLoop]: Path program histogram: [7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 22:05:16,022 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 22:05:16,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 304 transitions, 626 flow [2023-08-29 22:05:16,069 INFO L130 PetriNetUnfolder]: 75/507 cut-off events. [2023-08-29 22:05:16,070 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-29 22:05:16,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 507 events. 75/507 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2298 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 310. Up to 12 conditions per place. [2023-08-29 22:05:16,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 304 transitions, 626 flow [2023-08-29 22:05:16,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 304 transitions, 626 flow [2023-08-29 22:05:16,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:05:16,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 304 transitions, 626 flow [2023-08-29 22:05:16,078 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 304 transitions, 626 flow [2023-08-29 22:05:16,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 304 transitions, 626 flow [2023-08-29 22:05:16,121 INFO L130 PetriNetUnfolder]: 75/507 cut-off events. [2023-08-29 22:05:16,121 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-29 22:05:16,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 507 events. 75/507 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2298 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 310. Up to 12 conditions per place. [2023-08-29 22:05:16,138 INFO L119 LiptonReduction]: Number of co-enabled transitions 45036 [2023-08-29 22:05:20,722 INFO L134 LiptonReduction]: Checked pairs total: 92643 [2023-08-29 22:05:20,722 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-08-29 22:05:20,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 22:05:20,724 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;@67755ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:05:20,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 22:05:20,732 INFO L130 PetriNetUnfolder]: 35/150 cut-off events. [2023-08-29 22:05:20,732 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:05:20,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:05:20,732 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 22:05:20,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:05:20,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:05:20,733 INFO L85 PathProgramCache]: Analyzing trace with hash 95284613, now seen corresponding path program 1 times [2023-08-29 22:05:20,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:05:20,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543959510] [2023-08-29 22:05:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:05:20,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:05:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:05:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 22:05:20,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:05:20,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543959510] [2023-08-29 22:05:20,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543959510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:05:20,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:05:20,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:05:20,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388552867] [2023-08-29 22:05:20,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:05:20,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:05:20,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:05:20,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:05:20,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:05:20,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 572 [2023-08-29 22:05:20,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 22:05:20,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:05:20,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 572 [2023-08-29 22:05:20,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:05:23,034 INFO L130 PetriNetUnfolder]: 23621/39524 cut-off events. [2023-08-29 22:05:23,035 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-08-29 22:05:23,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74386 conditions, 39524 events. 23621/39524 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 336783 event pairs, 22344 based on Foata normal form. 3236/30111 useless extension candidates. Maximal degree in co-relation 31656. Up to 34738 conditions per place. [2023-08-29 22:05:23,116 INFO L137 encePairwiseOnDemand]: 530/572 looper letters, 47 selfloop transitions, 2 changer transitions 32/97 dead transitions. [2023-08-29 22:05:23,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 362 flow [2023-08-29 22:05:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:05:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:05:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-08-29 22:05:23,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5110722610722611 [2023-08-29 22:05:23,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-08-29 22:05:23,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-08-29 22:05:23,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:05:23,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-08-29 22:05:23,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states 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 22:05:23,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 22:05:23,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 22:05:23,121 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 877 transitions. [2023-08-29 22:05:23,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 362 flow [2023-08-29 22:05:23,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:05:23,123 INFO L231 Difference]: Finished difference. Result has 98 places, 65 transitions, 152 flow [2023-08-29 22:05:23,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=98, PETRI_TRANSITIONS=65} [2023-08-29 22:05:23,123 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:05:23,123 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 65 transitions, 152 flow [2023-08-29 22:05:23,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 22:05:23,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:05:23,124 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 22:05:23,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-29 22:05:23,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:05:23,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:05:23,125 INFO L85 PathProgramCache]: Analyzing trace with hash 102962207, now seen corresponding path program 1 times [2023-08-29 22:05:23,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:05:23,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865493609] [2023-08-29 22:05:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:05:23,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:05:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:05:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 22:05:23,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:05:23,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865493609] [2023-08-29 22:05:23,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865493609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:05:23,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945819665] [2023-08-29 22:05:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:05:23,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:05:23,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:05:23,155 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:05:23,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-29 22:05:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:05:23,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:05:23,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:05:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 22:05:23,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:05:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 22:05:23,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945819665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:05:23,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:05:23,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 22:05:23,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270365278] [2023-08-29 22:05:23,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:05:23,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:05:23,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:05:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:05:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:05:23,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 572 [2023-08-29 22:05:23,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 65 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 254.71428571428572) internal successors, (1783), 7 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states 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 22:05:23,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:05:23,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 572 [2023-08-29 22:05:23,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:05:23,933 INFO L130 PetriNetUnfolder]: 4492/7777 cut-off events. [2023-08-29 22:05:23,933 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-29 22:05:23,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14675 conditions, 7777 events. 4492/7777 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54571 event pairs, 4275 based on Foata normal form. 0/5054 useless extension candidates. Maximal degree in co-relation 14662. Up to 6803 conditions per place. [2023-08-29 22:05:23,951 INFO L137 encePairwiseOnDemand]: 569/572 looper letters, 47 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-29 22:05:23,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 268 flow [2023-08-29 22:05:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:05:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:05:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1573 transitions. [2023-08-29 22:05:23,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-29 22:05:23,953 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1573 transitions. [2023-08-29 22:05:23,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1573 transitions. [2023-08-29 22:05:23,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:05:23,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1573 transitions. [2023-08-29 22:05:23,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 262.1666666666667) internal successors, (1573), 6 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 22:05:23,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 572.0) internal successors, (4004), 7 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states 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 22:05:23,957 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 572.0) internal successors, (4004), 7 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states 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 22:05:23,957 INFO L175 Difference]: Start difference. First operand has 98 places, 65 transitions, 152 flow. Second operand 6 states and 1573 transitions. [2023-08-29 22:05:23,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 268 flow [2023-08-29 22:05:23,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 262 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:05:23,959 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 182 flow [2023-08-29 22:05:23,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-08-29 22:05:23,959 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -27 predicate places. [2023-08-29 22:05:23,959 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 182 flow [2023-08-29 22:05:23,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 254.71428571428572) internal successors, (1783), 7 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states 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 22:05:23,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:05:23,960 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 22:05:23,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-29 22:05:24,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-29 22:05:24,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:05:24,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:05:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash 219137029, now seen corresponding path program 2 times [2023-08-29 22:05:24,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:05:24,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252019438] [2023-08-29 22:05:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:05:24,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:05:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:05:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 22:05:24,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:05:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252019438] [2023-08-29 22:05:24,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252019438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:05:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459569753] [2023-08-29 22:05:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:05:24,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:05:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:05:24,215 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:05:24,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-29 22:05:24,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:05:24,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:05:24,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:05:24,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:05:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 22:05:24,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:05:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 22:05:24,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459569753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:05:24,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:05:24,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 22:05:24,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870519092] [2023-08-29 22:05:24,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:05:24,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:05:24,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:05:24,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:05:24,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 22:05:24,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 572 [2023-08-29 22:05:24,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 182 flow. Second operand has 13 states, 13 states have (on average 254.3846153846154) internal successors, (3307), 13 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states 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 22:05:24,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:05:24,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 572 [2023-08-29 22:05:24,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:05:24,955 INFO L130 PetriNetUnfolder]: 4492/7783 cut-off events. [2023-08-29 22:05:24,955 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-08-29 22:05:24,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14704 conditions, 7783 events. 4492/7783 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54534 event pairs, 4275 based on Foata normal form. 6/5067 useless extension candidates. Maximal degree in co-relation 14645. Up to 6803 conditions per place. [2023-08-29 22:05:24,974 INFO L137 encePairwiseOnDemand]: 569/572 looper letters, 47 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-08-29 22:05:24,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 334 flow [2023-08-29 22:05:24,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:05:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:05:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3100 transitions. [2023-08-29 22:05:24,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45163170163170163 [2023-08-29 22:05:24,977 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3100 transitions. [2023-08-29 22:05:24,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3100 transitions. [2023-08-29 22:05:24,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:05:24,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3100 transitions. [2023-08-29 22:05:24,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 258.3333333333333) internal successors, (3100), 12 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states 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 22:05:24,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 572.0) internal successors, (7436), 13 states have internal predecessors, (7436), 0 states have call successors, (0), 0 states 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 22:05:24,986 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 572.0) internal successors, (7436), 13 states have internal predecessors, (7436), 0 states have call successors, (0), 0 states 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 22:05:24,986 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 182 flow. Second operand 12 states and 3100 transitions. [2023-08-29 22:05:24,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 334 flow [2023-08-29 22:05:24,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 74 transitions, 320 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 22:05:24,988 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 252 flow [2023-08-29 22:05:24,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=252, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2023-08-29 22:05:24,989 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2023-08-29 22:05:24,989 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 252 flow [2023-08-29 22:05:24,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 254.3846153846154) internal successors, (3307), 13 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states 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 22:05:24,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:05:24,990 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 22:05:24,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-29 22:05:25,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:05:25,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:05:25,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:05:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash -304091707, now seen corresponding path program 3 times [2023-08-29 22:05:25,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:05:25,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070812464] [2023-08-29 22:05:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:05:25,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:05:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:05:25,213 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 22:05:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:05:25,238 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 22:05:25,239 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 22:05:25,239 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 22:05:25,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-29 22:05:25,239 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-29 22:05:25,240 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 22:05:25,240 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 22:05:25,240 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 22:05:25,268 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:05:25,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 387 transitions, 804 flow [2023-08-29 22:05:25,362 INFO L130 PetriNetUnfolder]: 110/747 cut-off events. [2023-08-29 22:05:25,363 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-29 22:05:25,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 747 events. 110/747 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3732 event pairs, 1 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 515. Up to 16 conditions per place. [2023-08-29 22:05:25,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 387 transitions, 804 flow [2023-08-29 22:05:25,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 387 transitions, 804 flow [2023-08-29 22:05:25,386 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:05:25,386 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 387 transitions, 804 flow [2023-08-29 22:05:25,386 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 387 transitions, 804 flow [2023-08-29 22:05:25,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 387 transitions, 804 flow [2023-08-29 22:05:25,476 INFO L130 PetriNetUnfolder]: 110/747 cut-off events. [2023-08-29 22:05:25,476 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-29 22:05:25,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 747 events. 110/747 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3732 event pairs, 1 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 515. Up to 16 conditions per place. [2023-08-29 22:05:25,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 87966 [2023-08-29 22:05:30,972 INFO L134 LiptonReduction]: Checked pairs total: 185352 [2023-08-29 22:05:30,973 INFO L136 LiptonReduction]: Total number of compositions: 347 [2023-08-29 22:05:30,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:05:30,974 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;@67755ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:05:30,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-08-29 22:05:30,975 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-29 22:05:30,975 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:05:30,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:05:30,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:05:30,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:05:30,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:05:30,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2823599, now seen corresponding path program 1 times [2023-08-29 22:05:30,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:05:30,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313300270] [2023-08-29 22:05:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:05:30,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:05:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:05:30,991 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 22:05:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:05:30,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313300270] [2023-08-29 22:05:30,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313300270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:05:30,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:05:30,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:05:30,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883286136] [2023-08-29 22:05:30,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:05:30,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:05:30,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:05:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:05:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:05:31,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 734 [2023-08-29 22:05:31,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 22:05:31,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:05:31,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 734 [2023-08-29 22:05:31,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:06:49,560 INFO L130 PetriNetUnfolder]: 786775/1121487 cut-off events. [2023-08-29 22:06:49,560 INFO L131 PetriNetUnfolder]: For 5917/5917 co-relation queries the response was YES. [2023-08-29 22:06:52,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158640 conditions, 1121487 events. 786775/1121487 cut-off events. For 5917/5917 co-relation queries the response was YES. Maximal size of possible extension queue 35574. Compared 10666422 event pairs, 757686 based on Foata normal form. 96530/814304 useless extension candidates. Maximal degree in co-relation 252119. Up to 1033503 conditions per place. [2023-08-29 22:06:58,240 INFO L137 encePairwiseOnDemand]: 680/734 looper letters, 96 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-08-29 22:06:58,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 125 transitions, 476 flow [2023-08-29 22:06:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:06:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:06:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-08-29 22:06:58,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068119891008175 [2023-08-29 22:06:58,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-08-29 22:06:58,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-08-29 22:06:58,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:06:58,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-08-29 22:06:58,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 22:06:58,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 734.0) internal successors, (2936), 4 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states 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 22:06:58,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 734.0) internal successors, (2936), 4 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states 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 22:06:58,249 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 380 flow. Second operand 3 states and 1116 transitions. [2023-08-29 22:06:58,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 125 transitions, 476 flow [2023-08-29 22:06:58,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 125 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:06:58,253 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 290 flow [2023-08-29 22:06:58,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=734, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2023-08-29 22:06:58,254 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -7 predicate places. [2023-08-29 22:06:58,256 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 290 flow [2023-08-29 22:06:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 22:06:58,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:06:58,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:06:58,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-29 22:06:58,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:06:58,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:06:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash 87507879, now seen corresponding path program 1 times [2023-08-29 22:06:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:06:58,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436406876] [2023-08-29 22:06:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:06:58,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:06:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:06:58,295 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 22:06:58,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:06:58,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436406876] [2023-08-29 22:06:58,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436406876] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:06:58,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713774205] [2023-08-29 22:06:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:06:58,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:06:58,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:06:58,301 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:06:58,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-29 22:06:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:06:58,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:06:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:06:58,495 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 22:06:58,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:06:58,510 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 22:06:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713774205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:06:58,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:06:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 22:06:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327318256] [2023-08-29 22:06:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:06:58,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:06:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:06:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:06:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:06:58,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 734 [2023-08-29 22:06:58,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 290 flow. Second operand has 7 states, 7 states have (on average 322.2857142857143) internal successors, (2256), 7 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:06:58,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:06:58,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 734 [2023-08-29 22:06:58,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand