./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.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 ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:07:42,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:07:42,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:07:43,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:07:43,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:07:43,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:07:43,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:07:43,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:07:43,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:07:43,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:07:43,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:07:43,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:07:43,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:07:43,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:07:43,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:07:43,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:07:43,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:07:43,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:07:43,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:07:43,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:07:43,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:07:43,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:07:43,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:07:43,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:07:43,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:07:43,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:07:43,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:07:43,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:07:43,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:07:43,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:07:43,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:07:43,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:07:43,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:07:43,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:07:43,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:07:43,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:07:43,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:07:43,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:07:43,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:07:43,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:07:43,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:07:43,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:07:43,125 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:07:43,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:07:43,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:07:43,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:07:43,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:07:43,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:07:43,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:07:43,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:07:43,128 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:07:43,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:07:43,129 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:07:43,129 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:07:43,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:07:43,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:07:43,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:07:43,130 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:07:43,130 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:07:43,130 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:07:43,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:07:43,131 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:07:43,131 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:07:43,131 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:07:43,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:07:43,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:07:43,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:07:43,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:07:43,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:07:43,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:07:43,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:07:43,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:07:43,133 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:07:43,133 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:07:43,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:07:43,133 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:07:43,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:07:43,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:07:43,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:07:43,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:07:43,439 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:07:43,439 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:07:43,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.i [2023-09-01 00:07:44,643 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:07:44,895 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:07:44,895 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.i [2023-09-01 00:07:44,914 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69419ae0/fae427dd5cca4eafb24670b4a6186f36/FLAG2e634882a [2023-09-01 00:07:44,927 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69419ae0/fae427dd5cca4eafb24670b4a6186f36 [2023-09-01 00:07:44,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:07:44,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:07:44,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:07:44,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:07:44,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:07:44,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:07:44" (1/1) ... [2023-09-01 00:07:44,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27757e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:44, skipping insertion in model container [2023-09-01 00:07:44,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:07:44" (1/1) ... [2023-09-01 00:07:44,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:07:44,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:07:45,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:07:45,352 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:07:45,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:07:45,474 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:07:45,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45 WrapperNode [2023-09-01 00:07:45,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:07:45,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:07:45,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:07:45,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:07:45,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,538 INFO L138 Inliner]: procedures = 262, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-09-01 00:07:45,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:07:45,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:07:45,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:07:45,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:07:45,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,559 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:07:45,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:07:45,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:07:45,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:07:45,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:07:45,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:45,602 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 00:07:45,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 00:07:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:07:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:07:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:07:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:07:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:07:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:07:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:07:45,639 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:07:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:07:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:07:45,641 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:07:45,749 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:07:45,751 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:07:46,018 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:07:46,024 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:07:46,025 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 00:07:46,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:07:46 BoogieIcfgContainer [2023-09-01 00:07:46,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:07:46,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:07:46,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:07:46,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:07:46,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:07:44" (1/3) ... [2023-09-01 00:07:46,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475738c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:07:46, skipping insertion in model container [2023-09-01 00:07:46,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (2/3) ... [2023-09-01 00:07:46,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475738c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:07:46, skipping insertion in model container [2023-09-01 00:07:46,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:07:46" (3/3) ... [2023-09-01 00:07:46,036 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2023-09-01 00:07:46,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:07:46,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-09-01 00:07:46,052 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:07:46,148 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 00:07:46,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 86 transitions, 177 flow [2023-09-01 00:07:46,240 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-09-01 00:07:46,240 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:46,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 154 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-09-01 00:07:46,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 86 transitions, 177 flow [2023-09-01 00:07:46,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 173 flow [2023-09-01 00:07:46,254 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:07:46,270 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 85 transitions, 173 flow [2023-09-01 00:07:46,274 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 85 transitions, 173 flow [2023-09-01 00:07:46,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 173 flow [2023-09-01 00:07:46,304 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-09-01 00:07:46,306 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:46,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 156 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-09-01 00:07:46,310 INFO L119 LiptonReduction]: Number of co-enabled transitions 1782 [2023-09-01 00:07:48,181 INFO L134 LiptonReduction]: Checked pairs total: 2347 [2023-09-01 00:07:48,182 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-09-01 00:07:48,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 00:07:48,198 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;@b855095, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:07:48,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-09-01 00:07:48,200 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 00:07:48,200 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:48,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:48,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 00:07:48,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:48,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:48,206 INFO L85 PathProgramCache]: Analyzing trace with hash 10885, now seen corresponding path program 1 times [2023-09-01 00:07:48,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:48,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332478981] [2023-09-01 00:07:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:48,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:48,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:48,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332478981] [2023-09-01 00:07:48,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332478981] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:48,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:48,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:07:48,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891484662] [2023-09-01 00:07:48,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:48,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 00:07:48,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 00:07:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 00:07:48,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 172 [2023-09-01 00:07:48,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:48,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 172 [2023-09-01 00:07:48,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:48,514 INFO L130 PetriNetUnfolder]: 74/155 cut-off events. [2023-09-01 00:07:48,514 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:48,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 155 events. 74/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 597 event pairs, 56 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 295. Up to 149 conditions per place. [2023-09-01 00:07:48,517 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 21 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2023-09-01 00:07:48,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 89 flow [2023-09-01 00:07:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 00:07:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 00:07:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2023-09-01 00:07:48,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2023-09-01 00:07:48,533 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2023-09-01 00:07:48,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2023-09-01 00:07:48,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:48,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2023-09-01 00:07:48,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,548 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,550 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 57 flow. Second operand 2 states and 190 transitions. [2023-09-01 00:07:48,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 89 flow [2023-09-01 00:07:48,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:48,554 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 46 flow [2023-09-01 00:07:48,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-09-01 00:07:48,559 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-09-01 00:07:48,559 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 46 flow [2023-09-01 00:07:48,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:48,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 00:07:48,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:07:48,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:48,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash 324474418, now seen corresponding path program 1 times [2023-09-01 00:07:48,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:48,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762610455] [2023-09-01 00:07:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:48,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:48,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762610455] [2023-09-01 00:07:48,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762610455] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:48,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:48,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:07:48,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639785352] [2023-09-01 00:07:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:48,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:07:48,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:07:48,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:07:48,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2023-09-01 00:07:48,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:48,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2023-09-01 00:07:48,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:48,697 INFO L130 PetriNetUnfolder]: 74/156 cut-off events. [2023-09-01 00:07:48,697 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:48,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 156 events. 74/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 597 event pairs, 56 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 307. Up to 149 conditions per place. [2023-09-01 00:07:48,699 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-09-01 00:07:48,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 92 flow [2023-09-01 00:07:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:07:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:07:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-09-01 00:07:48,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49806201550387597 [2023-09-01 00:07:48,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-09-01 00:07:48,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-09-01 00:07:48,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:48,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-09-01 00:07:48,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,705 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 46 flow. Second operand 3 states and 257 transitions. [2023-09-01 00:07:48,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 92 flow [2023-09-01 00:07:48,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:07:48,706 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 58 flow [2023-09-01 00:07:48,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-09-01 00:07:48,707 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2023-09-01 00:07:48,708 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 58 flow [2023-09-01 00:07:48,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:48,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 00:07:48,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 00:07:48,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:48,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:48,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1461062998, now seen corresponding path program 1 times [2023-09-01 00:07:48,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:48,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738928276] [2023-09-01 00:07:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:48,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738928276] [2023-09-01 00:07:48,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738928276] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162891337] [2023-09-01 00:07:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:48,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:48,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:48,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:48,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 00:07:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:07:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:48,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:48,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162891337] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:48,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:48,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:07:48,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281045436] [2023-09-01 00:07:48,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:48,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:07:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:07:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:07:49,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 172 [2023-09-01 00:07:49,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 78.57142857142857) internal successors, (550), 7 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) [2023-09-01 00:07:49,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:49,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 172 [2023-09-01 00:07:49,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:49,114 INFO L130 PetriNetUnfolder]: 74/159 cut-off events. [2023-09-01 00:07:49,114 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:49,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 159 events. 74/159 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 602 event pairs, 56 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 321. Up to 149 conditions per place. [2023-09-01 00:07:49,115 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2023-09-01 00:07:49,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 120 flow [2023-09-01 00:07:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:07:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:07:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2023-09-01 00:07:49,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748062015503876 [2023-09-01 00:07:49,119 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 490 transitions. [2023-09-01 00:07:49,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 490 transitions. [2023-09-01 00:07:49,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:49,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 490 transitions. [2023-09-01 00:07:49,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,124 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,124 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 6 states and 490 transitions. [2023-09-01 00:07:49,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 120 flow [2023-09-01 00:07:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 116 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:49,125 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 90 flow [2023-09-01 00:07:49,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-09-01 00:07:49,126 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-09-01 00:07:49,127 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 90 flow [2023-09-01 00:07:49,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.57142857142857) internal successors, (550), 7 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) [2023-09-01 00:07:49,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:49,127 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-09-01 00:07:49,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:49,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:49,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:49,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2031239374, now seen corresponding path program 2 times [2023-09-01 00:07:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:49,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447934084] [2023-09-01 00:07:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:49,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:49,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:49,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447934084] [2023-09-01 00:07:49,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447934084] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:49,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919712110] [2023-09-01 00:07:49,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:07:49,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:49,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:49,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:49,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 00:07:49,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 00:07:49,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:07:49,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 00:07:49,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:49,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:49,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 00:07:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 00:07:49,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:07:49,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919712110] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:49,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 00:07:49,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-09-01 00:07:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145667204] [2023-09-01 00:07:49,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:49,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 00:07:49,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:49,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 00:07:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-09-01 00:07:49,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 172 [2023-09-01 00:07:49,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:49,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 172 [2023-09-01 00:07:49,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:49,957 INFO L130 PetriNetUnfolder]: 119/260 cut-off events. [2023-09-01 00:07:49,957 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 00:07:49,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 260 events. 119/260 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1071 event pairs, 56 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 522. Up to 152 conditions per place. [2023-09-01 00:07:49,961 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 36 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-09-01 00:07:49,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 196 flow [2023-09-01 00:07:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:07:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:07:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2023-09-01 00:07:49,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956395348837209 [2023-09-01 00:07:49,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 341 transitions. [2023-09-01 00:07:49,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 341 transitions. [2023-09-01 00:07:49,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:49,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 341 transitions. [2023-09-01 00:07:49,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,967 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,967 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 90 flow. Second operand 4 states and 341 transitions. [2023-09-01 00:07:49,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 196 flow [2023-09-01 00:07:49,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 182 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:49,970 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 92 flow [2023-09-01 00:07:49,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-09-01 00:07:49,971 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2023-09-01 00:07:49,972 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 92 flow [2023-09-01 00:07:49,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:49,972 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-09-01 00:07:49,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:50,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 00:07:50,178 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:50,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash -2031239495, now seen corresponding path program 1 times [2023-09-01 00:07:50,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:50,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175885920] [2023-09-01 00:07:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:50,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:50,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:50,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175885920] [2023-09-01 00:07:50,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175885920] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:50,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272929309] [2023-09-01 00:07:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:50,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:50,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:50,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:50,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 00:07:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:50,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:07:50,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:50,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:50,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272929309] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:50,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:50,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-09-01 00:07:50,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389641551] [2023-09-01 00:07:50,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:50,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 00:07:50,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 00:07:50,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-09-01 00:07:50,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 172 [2023-09-01 00:07:50,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 92 flow. Second operand has 12 states, 12 states have (on average 78.25) internal successors, (939), 12 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:50,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 172 [2023-09-01 00:07:50,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:50,546 INFO L130 PetriNetUnfolder]: 119/264 cut-off events. [2023-09-01 00:07:50,546 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-09-01 00:07:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 264 events. 119/264 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1014 event pairs, 96 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 592. Up to 239 conditions per place. [2023-09-01 00:07:50,549 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 21 selfloop transitions, 11 changer transitions 0/33 dead transitions. [2023-09-01 00:07:50,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 192 flow [2023-09-01 00:07:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:07:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:07:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 961 transitions. [2023-09-01 00:07:50,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46560077519379844 [2023-09-01 00:07:50,552 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 961 transitions. [2023-09-01 00:07:50,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 961 transitions. [2023-09-01 00:07:50,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:50,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 961 transitions. [2023-09-01 00:07:50,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 80.08333333333333) internal successors, (961), 12 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 172.0) internal successors, (2236), 13 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,558 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 172.0) internal successors, (2236), 13 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,559 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 92 flow. Second operand 12 states and 961 transitions. [2023-09-01 00:07:50,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 192 flow [2023-09-01 00:07:50,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:07:50,561 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 172 flow [2023-09-01 00:07:50,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=33} [2023-09-01 00:07:50,561 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2023-09-01 00:07:50,562 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 172 flow [2023-09-01 00:07:50,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 78.25) internal successors, (939), 12 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:50,562 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-09-01 00:07:50,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:50,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:50,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:50,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1543130169, now seen corresponding path program 2 times [2023-09-01 00:07:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:50,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395209099] [2023-09-01 00:07:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:50,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:51,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:51,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395209099] [2023-09-01 00:07:51,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395209099] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:51,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:51,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 00:07:51,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135501374] [2023-09-01 00:07:51,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:51,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 00:07:51,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:51,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 00:07:51,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 00:07:51,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 172 [2023-09-01 00:07:51,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 33 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:51,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 172 [2023-09-01 00:07:51,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:51,218 INFO L130 PetriNetUnfolder]: 184/382 cut-off events. [2023-09-01 00:07:51,218 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-09-01 00:07:51,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 382 events. 184/382 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1584 event pairs, 96 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 879. Up to 248 conditions per place. [2023-09-01 00:07:51,222 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 43 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-09-01 00:07:51,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 302 flow [2023-09-01 00:07:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:07:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:07:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2023-09-01 00:07:51,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898255813953488 [2023-09-01 00:07:51,224 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2023-09-01 00:07:51,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2023-09-01 00:07:51,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:51,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2023-09-01 00:07:51,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,227 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,227 INFO L175 Difference]: Start difference. First operand has 51 places, 33 transitions, 172 flow. Second operand 4 states and 337 transitions. [2023-09-01 00:07:51,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 302 flow [2023-09-01 00:07:51,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 254 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-09-01 00:07:51,234 INFO L231 Difference]: Finished difference. Result has 50 places, 34 transitions, 142 flow [2023-09-01 00:07:51,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2023-09-01 00:07:51,237 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-09-01 00:07:51,237 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 142 flow [2023-09-01 00:07:51,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:51,237 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-09-01 00:07:51,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 00:07:51,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:51,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1543130168, now seen corresponding path program 1 times [2023-09-01 00:07:51,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:51,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948402095] [2023-09-01 00:07:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:51,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948402095] [2023-09-01 00:07:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948402095] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:51,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:51,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:07:51,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811196012] [2023-09-01 00:07:51,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:51,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:07:51,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:51,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:07:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:07:51,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2023-09-01 00:07:51,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 34 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:51,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2023-09-01 00:07:51,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:51,513 INFO L130 PetriNetUnfolder]: 158/334 cut-off events. [2023-09-01 00:07:51,513 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-09-01 00:07:51,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 334 events. 158/334 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1274 event pairs, 108 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 837. Up to 274 conditions per place. [2023-09-01 00:07:51,516 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 38 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-09-01 00:07:51,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 250 flow [2023-09-01 00:07:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:07:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:07:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-09-01 00:07:51,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213178294573644 [2023-09-01 00:07:51,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-09-01 00:07:51,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-09-01 00:07:51,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:51,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-09-01 00:07:51,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,520 INFO L175 Difference]: Start difference. First operand has 50 places, 34 transitions, 142 flow. Second operand 3 states and 269 transitions. [2023-09-01 00:07:51,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 250 flow [2023-09-01 00:07:51,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:07:51,522 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 142 flow [2023-09-01 00:07:51,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-09-01 00:07:51,522 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2023-09-01 00:07:51,523 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 142 flow [2023-09-01 00:07:51,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:51,523 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-09-01 00:07:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 00:07:51,523 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:51,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:51,524 INFO L85 PathProgramCache]: Analyzing trace with hash 592398959, now seen corresponding path program 1 times [2023-09-01 00:07:51,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:51,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121335920] [2023-09-01 00:07:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:51,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:51,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:51,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121335920] [2023-09-01 00:07:51,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121335920] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:51,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:51,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 00:07:51,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401142480] [2023-09-01 00:07:51,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:51,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 00:07:51,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 00:07:51,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 00:07:51,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2023-09-01 00:07:51,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:51,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2023-09-01 00:07:51,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:51,904 INFO L130 PetriNetUnfolder]: 136/300 cut-off events. [2023-09-01 00:07:51,904 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-09-01 00:07:51,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 300 events. 136/300 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1181 event pairs, 9 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 782. Up to 190 conditions per place. [2023-09-01 00:07:51,907 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 47 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2023-09-01 00:07:51,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 338 flow [2023-09-01 00:07:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 00:07:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 00:07:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2023-09-01 00:07:51,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2023-09-01 00:07:51,909 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 415 transitions. [2023-09-01 00:07:51,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 415 transitions. [2023-09-01 00:07:51,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:51,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 415 transitions. [2023-09-01 00:07:51,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,913 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,913 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 142 flow. Second operand 5 states and 415 transitions. [2023-09-01 00:07:51,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 338 flow [2023-09-01 00:07:51,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:07:51,915 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 212 flow [2023-09-01 00:07:51,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-09-01 00:07:51,918 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2023-09-01 00:07:51,918 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 212 flow [2023-09-01 00:07:51,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:51,919 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:07:51,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:07:51,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:51,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash 137532136, now seen corresponding path program 1 times [2023-09-01 00:07:51,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:51,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921814510] [2023-09-01 00:07:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:51,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:52,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:52,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921814510] [2023-09-01 00:07:52,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921814510] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:52,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045084023] [2023-09-01 00:07:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:52,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:52,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:52,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:52,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 00:07:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:52,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 00:07:52,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:52,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:52,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 00:07:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:52,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:52,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045084023] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:52,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:52,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-09-01 00:07:52,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774575175] [2023-09-01 00:07:52,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:52,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 00:07:52,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:52,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 00:07:52,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-09-01 00:07:53,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2023-09-01 00:07:53,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 212 flow. Second operand has 15 states, 15 states have (on average 74.0) internal successors, (1110), 15 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:53,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:53,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2023-09-01 00:07:53,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:53,655 INFO L130 PetriNetUnfolder]: 280/618 cut-off events. [2023-09-01 00:07:53,655 INFO L131 PetriNetUnfolder]: For 399/399 co-relation queries the response was YES. [2023-09-01 00:07:53,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 618 events. 280/618 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2536 event pairs, 54 based on Foata normal form. 84/679 useless extension candidates. Maximal degree in co-relation 1925. Up to 196 conditions per place. [2023-09-01 00:07:53,661 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 106 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2023-09-01 00:07:53,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 115 transitions, 780 flow [2023-09-01 00:07:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 00:07:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 00:07:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 662 transitions. [2023-09-01 00:07:53,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811046511627907 [2023-09-01 00:07:53,664 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 662 transitions. [2023-09-01 00:07:53,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 662 transitions. [2023-09-01 00:07:53,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:53,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 662 transitions. [2023-09-01 00:07:53,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 82.75) internal successors, (662), 8 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:53,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:53,668 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:53,668 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 212 flow. Second operand 8 states and 662 transitions. [2023-09-01 00:07:53,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 115 transitions, 780 flow [2023-09-01 00:07:53,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 115 transitions, 780 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:07:53,672 INFO L231 Difference]: Finished difference. Result has 66 places, 44 transitions, 277 flow [2023-09-01 00:07:53,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=66, PETRI_TRANSITIONS=44} [2023-09-01 00:07:53,672 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2023-09-01 00:07:53,673 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 44 transitions, 277 flow [2023-09-01 00:07:53,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.0) internal successors, (1110), 15 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:53,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:53,673 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:07:53,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:53,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:53,880 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:53,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 28456066, now seen corresponding path program 1 times [2023-09-01 00:07:53,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877673694] [2023-09-01 00:07:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:54,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:54,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877673694] [2023-09-01 00:07:54,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877673694] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:54,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900897924] [2023-09-01 00:07:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:54,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:54,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:54,147 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:54,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 00:07:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:54,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 00:07:54,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:54,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 00:07:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:54,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:54,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900897924] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:54,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:54,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-09-01 00:07:54,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003332852] [2023-09-01 00:07:54,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:54,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 00:07:54,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 00:07:54,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-09-01 00:07:55,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2023-09-01 00:07:55,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 44 transitions, 277 flow. Second operand has 15 states, 15 states have (on average 73.0) internal successors, (1095), 15 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:55,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:55,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2023-09-01 00:07:55,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:55,479 INFO L130 PetriNetUnfolder]: 556/1170 cut-off events. [2023-09-01 00:07:55,480 INFO L131 PetriNetUnfolder]: For 2461/2461 co-relation queries the response was YES. [2023-09-01 00:07:55,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1170 events. 556/1170 cut-off events. For 2461/2461 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5342 event pairs, 132 based on Foata normal form. 138/1285 useless extension candidates. Maximal degree in co-relation 3979. Up to 424 conditions per place. [2023-09-01 00:07:55,490 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 111 selfloop transitions, 7 changer transitions 0/119 dead transitions. [2023-09-01 00:07:55,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 119 transitions, 999 flow [2023-09-01 00:07:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 00:07:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 00:07:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 648 transitions. [2023-09-01 00:07:55,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2023-09-01 00:07:55,493 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 648 transitions. [2023-09-01 00:07:55,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 648 transitions. [2023-09-01 00:07:55,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:55,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 648 transitions. [2023-09-01 00:07:55,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:55,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:55,497 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:55,498 INFO L175 Difference]: Start difference. First operand has 66 places, 44 transitions, 277 flow. Second operand 8 states and 648 transitions. [2023-09-01 00:07:55,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 119 transitions, 999 flow [2023-09-01 00:07:55,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 948 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-09-01 00:07:55,505 INFO L231 Difference]: Finished difference. Result has 75 places, 48 transitions, 336 flow [2023-09-01 00:07:55,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=75, PETRI_TRANSITIONS=48} [2023-09-01 00:07:55,506 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2023-09-01 00:07:55,507 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 48 transitions, 336 flow [2023-09-01 00:07:55,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.0) internal successors, (1095), 15 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:55,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:55,507 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-09-01 00:07:55,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 00:07:55,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 00:07:55,714 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:55,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:55,714 INFO L85 PathProgramCache]: Analyzing trace with hash -495639670, now seen corresponding path program 2 times [2023-09-01 00:07:55,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:55,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001318767] [2023-09-01 00:07:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:55,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:56,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:56,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001318767] [2023-09-01 00:07:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001318767] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:56,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898573335] [2023-09-01 00:07:56,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:07:56,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:56,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:56,211 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:56,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 00:07:56,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:07:56,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:07:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 00:07:56,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:56,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:56,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 00:07:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:56,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:07:56,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898573335] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:56,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 00:07:56,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-09-01 00:07:56,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145436971] [2023-09-01 00:07:56,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:56,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 00:07:56,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:56,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 00:07:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-09-01 00:07:56,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 172 [2023-09-01 00:07:56,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 48 transitions, 336 flow. Second operand has 9 states, 9 states have (on average 78.44444444444444) internal successors, (706), 9 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:56,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:56,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 172 [2023-09-01 00:07:56,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:57,186 INFO L130 PetriNetUnfolder]: 530/1120 cut-off events. [2023-09-01 00:07:57,186 INFO L131 PetriNetUnfolder]: For 2232/2232 co-relation queries the response was YES. [2023-09-01 00:07:57,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4188 conditions, 1120 events. 530/1120 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5045 event pairs, 0 based on Foata normal form. 26/1124 useless extension candidates. Maximal degree in co-relation 4159. Up to 276 conditions per place. [2023-09-01 00:07:57,196 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 130 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-09-01 00:07:57,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 137 transitions, 1190 flow [2023-09-01 00:07:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 00:07:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 00:07:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 688 transitions. [2023-09-01 00:07:57,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-09-01 00:07:57,199 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 688 transitions. [2023-09-01 00:07:57,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 688 transitions. [2023-09-01 00:07:57,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:57,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 688 transitions. [2023-09-01 00:07:57,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:57,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:57,203 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:57,203 INFO L175 Difference]: Start difference. First operand has 75 places, 48 transitions, 336 flow. Second operand 8 states and 688 transitions. [2023-09-01 00:07:57,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 137 transitions, 1190 flow [2023-09-01 00:07:57,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 137 transitions, 1141 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-09-01 00:07:57,213 INFO L231 Difference]: Finished difference. Result has 79 places, 46 transitions, 313 flow [2023-09-01 00:07:57,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=79, PETRI_TRANSITIONS=46} [2023-09-01 00:07:57,214 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2023-09-01 00:07:57,214 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 46 transitions, 313 flow [2023-09-01 00:07:57,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.44444444444444) internal successors, (706), 9 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:57,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:57,215 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-09-01 00:07:57,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:57,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:57,422 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:07:57,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1803083171, now seen corresponding path program 2 times [2023-09-01 00:07:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:57,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002032015] [2023-09-01 00:07:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:57,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:57,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:57,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002032015] [2023-09-01 00:07:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002032015] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:57,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118847130] [2023-09-01 00:07:57,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:07:57,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:57,837 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:57,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 00:07:57,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:07:57,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:07:57,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 00:07:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:58,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:58,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 00:07:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:58,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:08:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:00,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118847130] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:08:00,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:08:00,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-09-01 00:08:00,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466374615] [2023-09-01 00:08:00,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:08:00,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 00:08:00,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:00,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 00:08:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-09-01 00:08:02,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2023-09-01 00:08:02,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 46 transitions, 313 flow. Second operand has 25 states, 25 states have (on average 73.64) internal successors, (1841), 25 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:02,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:02,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2023-09-01 00:08:02,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:03,200 INFO L130 PetriNetUnfolder]: 1058/2176 cut-off events. [2023-09-01 00:08:03,200 INFO L131 PetriNetUnfolder]: For 6686/6686 co-relation queries the response was YES. [2023-09-01 00:08:03,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7841 conditions, 2176 events. 1058/2176 cut-off events. For 6686/6686 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 9848 event pairs, 125 based on Foata normal form. 264/2418 useless extension candidates. Maximal degree in co-relation 7812. Up to 491 conditions per place. [2023-09-01 00:08:03,218 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 188 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2023-09-01 00:08:03,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 202 transitions, 1707 flow [2023-09-01 00:08:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 00:08:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 00:08:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1137 transitions. [2023-09-01 00:08:03,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47217607973421927 [2023-09-01 00:08:03,223 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1137 transitions. [2023-09-01 00:08:03,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1137 transitions. [2023-09-01 00:08:03,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:03,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1137 transitions. [2023-09-01 00:08:03,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 81.21428571428571) internal successors, (1137), 14 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:03,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:03,231 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:03,231 INFO L175 Difference]: Start difference. First operand has 79 places, 46 transitions, 313 flow. Second operand 14 states and 1137 transitions. [2023-09-01 00:08:03,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 202 transitions, 1707 flow [2023-09-01 00:08:03,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 202 transitions, 1597 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 00:08:03,240 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 438 flow [2023-09-01 00:08:03,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=438, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2023-09-01 00:08:03,241 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2023-09-01 00:08:03,242 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 438 flow [2023-09-01 00:08:03,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.64) internal successors, (1841), 25 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:03,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:03,243 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-09-01 00:08:03,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 00:08:03,449 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 [2023-09-01 00:08:03,449 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:08:03,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:03,450 INFO L85 PathProgramCache]: Analyzing trace with hash 65465491, now seen corresponding path program 3 times [2023-09-01 00:08:03,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:03,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218187351] [2023-09-01 00:08:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:03,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:03,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:03,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218187351] [2023-09-01 00:08:03,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218187351] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:08:03,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146679342] [2023-09-01 00:08:03,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 00:08:03,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:08:03,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:08:03,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:08:03,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 00:08:03,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 00:08:03,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:08:03,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 00:08:03,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:08:04,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:08:04,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 00:08:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-09-01 00:08:04,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:08:04,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146679342] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:04,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 00:08:04,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-09-01 00:08:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666283095] [2023-09-01 00:08:04,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:04,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:08:04,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:04,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:08:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-09-01 00:08:04,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2023-09-01 00:08:04,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:04,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2023-09-01 00:08:04,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:04,824 INFO L130 PetriNetUnfolder]: 1036/2132 cut-off events. [2023-09-01 00:08:04,825 INFO L131 PetriNetUnfolder]: For 6165/6165 co-relation queries the response was YES. [2023-09-01 00:08:04,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8113 conditions, 2132 events. 1036/2132 cut-off events. For 6165/6165 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 9683 event pairs, 21 based on Foata normal form. 22/2132 useless extension candidates. Maximal degree in co-relation 8078. Up to 1910 conditions per place. [2023-09-01 00:08:04,847 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 81 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-09-01 00:08:04,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 86 transitions, 803 flow [2023-09-01 00:08:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:08:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:08:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 473 transitions. [2023-09-01 00:08:04,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-09-01 00:08:04,850 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 473 transitions. [2023-09-01 00:08:04,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 473 transitions. [2023-09-01 00:08:04,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:04,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 473 transitions. [2023-09-01 00:08:04,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,854 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,854 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 438 flow. Second operand 6 states and 473 transitions. [2023-09-01 00:08:04,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 86 transitions, 803 flow [2023-09-01 00:08:04,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 763 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-09-01 00:08:04,868 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 390 flow [2023-09-01 00:08:04,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-09-01 00:08:04,868 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2023-09-01 00:08:04,868 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 390 flow [2023-09-01 00:08:04,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:04,869 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-09-01 00:08:04,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 00:08:05,076 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 [2023-09-01 00:08:05,076 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:08:05,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash 65465486, now seen corresponding path program 1 times [2023-09-01 00:08:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:05,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053957030] [2023-09-01 00:08:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-09-01 00:08:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:05,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053957030] [2023-09-01 00:08:05,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053957030] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:05,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:05,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:08:05,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518275805] [2023-09-01 00:08:05,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:05,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:08:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:08:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:08:05,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2023-09-01 00:08:05,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 52 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:05,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:05,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2023-09-01 00:08:05,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:05,687 INFO L130 PetriNetUnfolder]: 1014/2063 cut-off events. [2023-09-01 00:08:05,688 INFO L131 PetriNetUnfolder]: For 4639/4639 co-relation queries the response was YES. [2023-09-01 00:08:05,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7513 conditions, 2063 events. 1014/2063 cut-off events. For 4639/4639 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 9408 event pairs, 924 based on Foata normal form. 0/2063 useless extension candidates. Maximal degree in co-relation 7477. Up to 1982 conditions per place. [2023-09-01 00:08:05,708 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 52 selfloop transitions, 4 changer transitions 2/59 dead transitions. [2023-09-01 00:08:05,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 59 transitions, 512 flow [2023-09-01 00:08:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:08:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:08:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2023-09-01 00:08:05,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2023-09-01 00:08:05,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 320 transitions. [2023-09-01 00:08:05,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 320 transitions. [2023-09-01 00:08:05,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:05,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 320 transitions. [2023-09-01 00:08:05,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:05,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:05,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:05,713 INFO L175 Difference]: Start difference. First operand has 90 places, 52 transitions, 390 flow. Second operand 4 states and 320 transitions. [2023-09-01 00:08:05,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 59 transitions, 512 flow [2023-09-01 00:08:05,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 59 transitions, 507 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 00:08:05,726 INFO L231 Difference]: Finished difference. Result has 89 places, 49 transitions, 331 flow [2023-09-01 00:08:05,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=89, PETRI_TRANSITIONS=49} [2023-09-01 00:08:05,726 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2023-09-01 00:08:05,727 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 49 transitions, 331 flow [2023-09-01 00:08:05,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:05,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:05,727 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:05,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 00:08:05,728 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-09-01 00:08:05,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1803452644, now seen corresponding path program 1 times [2023-09-01 00:08:05,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:05,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538501082] [2023-09-01 00:08:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-09-01 00:08:05,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:05,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538501082] [2023-09-01 00:08:05,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538501082] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:08:05,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260090594] [2023-09-01 00:08:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:05,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:08:05,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:08:05,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:08:05,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 00:08:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:06,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 00:08:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:08:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-09-01 00:08:06,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:08:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-09-01 00:08:06,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260090594] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:08:06,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:08:06,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-09-01 00:08:06,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603074120] [2023-09-01 00:08:06,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:08:06,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 00:08:06,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:06,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 00:08:06,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-09-01 00:08:06,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 172 [2023-09-01 00:08:06,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 49 transitions, 331 flow. Second operand has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:06,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 172 [2023-09-01 00:08:06,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:06,906 INFO L130 PetriNetUnfolder]: 968/1960 cut-off events. [2023-09-01 00:08:06,906 INFO L131 PetriNetUnfolder]: For 4279/4279 co-relation queries the response was YES. [2023-09-01 00:08:06,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7049 conditions, 1960 events. 968/1960 cut-off events. For 4279/4279 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 9067 event pairs, 44 based on Foata normal form. 10/1970 useless extension candidates. Maximal degree in co-relation 7013. Up to 1665 conditions per place. [2023-09-01 00:08:06,919 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 0 selfloop transitions, 0 changer transitions 91/91 dead transitions. [2023-09-01 00:08:06,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 769 flow [2023-09-01 00:08:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 00:08:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 00:08:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 513 transitions. [2023-09-01 00:08:06,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260797342192691 [2023-09-01 00:08:06,923 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 513 transitions. [2023-09-01 00:08:06,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 513 transitions. [2023-09-01 00:08:06,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:06,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 513 transitions. [2023-09-01 00:08:06,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.28571428571429) internal successors, (513), 7 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,927 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,927 INFO L175 Difference]: Start difference. First operand has 89 places, 49 transitions, 331 flow. Second operand 7 states and 513 transitions. [2023-09-01 00:08:06,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 769 flow [2023-09-01 00:08:06,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 736 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-09-01 00:08:06,941 INFO L231 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2023-09-01 00:08:06,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2023-09-01 00:08:06,942 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2023-09-01 00:08:06,942 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2023-09-01 00:08:06,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,944 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-09-01 00:08:06,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-09-01 00:08:06,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2023-09-01 00:08:06,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-09-01 00:08:06,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-09-01 00:08:06,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-09-01 00:08:06,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-09-01 00:08:06,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-09-01 00:08:06,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-09-01 00:08:06,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-09-01 00:08:06,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-09-01 00:08:06,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-09-01 00:08:06,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-09-01 00:08:06,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-09-01 00:08:06,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-09-01 00:08:06,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-09-01 00:08:06,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 00:08:07,154 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,SelfDestructingSolverStorable14 [2023-09-01 00:08:07,154 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:07,158 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 00:08:07,158 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 00:08:07,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 12:08:07 BasicIcfg [2023-09-01 00:08:07,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 00:08:07,161 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 00:08:07,161 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 00:08:07,161 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 00:08:07,162 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:07:46" (3/4) ... [2023-09-01 00:08:07,164 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 00:08:07,169 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-09-01 00:08:07,172 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-09-01 00:08:07,173 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 00:08:07,173 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 00:08:07,204 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 00:08:07,204 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 00:08:07,205 INFO L158 Benchmark]: Toolchain (without parser) took 22275.05ms. Allocated memory was 77.6MB in the beginning and 272.6MB in the end (delta: 195.0MB). Free memory was 53.3MB in the beginning and 118.3MB in the end (delta: -65.0MB). Peak memory consumption was 128.4MB. Max. memory is 16.1GB. [2023-09-01 00:08:07,205 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 58.7MB. Free memory is still 36.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 00:08:07,205 INFO L158 Benchmark]: CACSL2BoogieTranslator took 544.53ms. Allocated memory is still 77.6MB. Free memory was 53.0MB in the beginning and 43.6MB in the end (delta: 9.4MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. [2023-09-01 00:08:07,206 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.11ms. Allocated memory is still 77.6MB. Free memory was 43.6MB in the beginning and 41.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:07,206 INFO L158 Benchmark]: Boogie Preprocessor took 23.33ms. Allocated memory is still 77.6MB. Free memory was 41.5MB in the beginning and 39.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:07,206 INFO L158 Benchmark]: RCFGBuilder took 463.58ms. Allocated memory is still 77.6MB. Free memory was 39.8MB in the beginning and 51.7MB in the end (delta: -11.9MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2023-09-01 00:08:07,207 INFO L158 Benchmark]: TraceAbstraction took 21132.79ms. Allocated memory was 77.6MB in the beginning and 272.6MB in the end (delta: 195.0MB). Free memory was 51.2MB in the beginning and 120.6MB in the end (delta: -69.4MB). Peak memory consumption was 124.7MB. Max. memory is 16.1GB. [2023-09-01 00:08:07,207 INFO L158 Benchmark]: Witness Printer took 43.18ms. Allocated memory is still 272.6MB. Free memory was 120.6MB in the beginning and 118.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:07,210 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 58.7MB. Free memory is still 36.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 544.53ms. Allocated memory is still 77.6MB. Free memory was 53.0MB in the beginning and 43.6MB in the end (delta: 9.4MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.11ms. Allocated memory is still 77.6MB. Free memory was 43.6MB in the beginning and 41.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.33ms. Allocated memory is still 77.6MB. Free memory was 41.5MB in the beginning and 39.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 463.58ms. Allocated memory is still 77.6MB. Free memory was 39.8MB in the beginning and 51.7MB in the end (delta: -11.9MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * TraceAbstraction took 21132.79ms. Allocated memory was 77.6MB in the beginning and 272.6MB in the end (delta: 195.0MB). Free memory was 51.2MB in the beginning and 120.6MB in the end (delta: -69.4MB). Peak memory consumption was 124.7MB. Max. memory is 16.1GB. * Witness Printer took 43.18ms. Allocated memory is still 272.6MB. Free memory was 120.6MB in the beginning and 118.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 83 PlacesBefore, 28 PlacesAfterwards, 85 TransitionsBefore, 27 TransitionsAfterwards, 1782 CoEnabledTransitionPairs, 4 FixpointIterations, 19 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 86 TotalNumberOfCompositions, 2347 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1609, independent: 1539, independent conditional: 0, independent unconditional: 1539, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 978, independent: 947, independent conditional: 0, independent unconditional: 947, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1609, independent: 592, independent conditional: 0, independent unconditional: 592, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 978, unknown conditional: 0, unknown unconditional: 978] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 932]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 108 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.0s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3211 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2693 mSDsluCounter, 1422 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1344 mSDsCounter, 142 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7625 IncrementalHoareTripleChecker+Invalid, 7767 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 142 mSolverCounterUnsat, 78 mSDtfsCounter, 7625 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 471 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=438occurred in iteration=12, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 582 NumberOfCodeBlocks, 540 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 694 ConstructedInterpolants, 33 QuantifiedInterpolants, 7409 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1925 ConjunctsInSsa, 168 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 2211/2439 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 00:08:07,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE