./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/clever.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/clever.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:06:46,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:06:46,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:06:46,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:06:46,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:06:46,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:06:46,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:06:46,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:06:46,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:06:46,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:06:46,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:06:46,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:06:46,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:06:46,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:06:46,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:06:46,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:06:46,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:06:46,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:06:46,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:06:46,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:06:46,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:06:46,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:06:46,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:06:46,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:06:46,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:06:46,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:06:46,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:06:46,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:06:46,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:06:46,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:06:46,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:06:46,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:06:46,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:06:46,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:06:46,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:06:46,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:06:46,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:06:46,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:06:47,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:06:47,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:06:47,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:06:47,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:06:47,023 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:06:47,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:06:47,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:06:47,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:06:47,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:06:47,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:06:47,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:06:47,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:06:47,026 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:06:47,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:06:47,027 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:06:47,027 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:06:47,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:06:47,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:06:47,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:06:47,028 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:06:47,028 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:06:47,028 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:06:47,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:06:47,028 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:06:47,028 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:06:47,029 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:06:47,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:06:47,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:06:47,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:06:47,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:06:47,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:06:47,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:06:47,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:06:47,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:06:47,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:06:47,030 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:06:47,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:06:47,031 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:06:47,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:06:47,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:06:47,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:06:47,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:06:47,284 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:06:47,285 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:06:47,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-29 23:06:48,350 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:06:48,543 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:06:48,543 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-29 23:06:48,551 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcfbb88b2/d47afe50faa54feda28f923a221ff433/FLAG2faef820b [2023-08-29 23:06:48,571 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcfbb88b2/d47afe50faa54feda28f923a221ff433 [2023-08-29 23:06:48,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:06:48,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:06:48,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:06:48,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:06:48,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:06:48,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e30994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48, skipping insertion in model container [2023-08-29 23:06:48,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:06:48,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:06:48,712 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c[2133,2146] [2023-08-29 23:06:48,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:06:48,724 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:06:48,753 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c[2133,2146] [2023-08-29 23:06:48,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:06:48,767 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:06:48,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48 WrapperNode [2023-08-29 23:06:48,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:06:48,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:06:48,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:06:48,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:06:48,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,845 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2023-08-29 23:06:48,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:06:48,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:06:48,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:06:48,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:06:48,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,877 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:06:48,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:06:48,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:06:48,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:06:48,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (1/1) ... [2023-08-29 23:06:48,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:06:48,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:06:48,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:06:48,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:06:48,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:06:48,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:06:48,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:06:48,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:06:48,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:06:48,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:06:48,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:06:48,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:06:48,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:06:48,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:06:48,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:06:48,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:06:48,982 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:06:49,060 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:06:49,062 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:06:49,294 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:06:49,299 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:06:49,300 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 23:06:49,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:06:49 BoogieIcfgContainer [2023-08-29 23:06:49,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:06:49,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:06:49,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:06:49,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:06:49,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:06:48" (1/3) ... [2023-08-29 23:06:49,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360e61dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:06:49, skipping insertion in model container [2023-08-29 23:06:49,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:06:48" (2/3) ... [2023-08-29 23:06:49,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360e61dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:06:49, skipping insertion in model container [2023-08-29 23:06:49,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:06:49" (3/3) ... [2023-08-29 23:06:49,316 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-08-29 23:06:49,334 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:06:49,334 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-29 23:06:49,334 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:06:49,419 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 23:06:49,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 278 flow [2023-08-29 23:06:49,500 INFO L130 PetriNetUnfolder]: 9/129 cut-off events. [2023-08-29 23:06:49,501 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:06:49,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 9/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-29 23:06:49,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 131 transitions, 278 flow [2023-08-29 23:06:49,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 125 transitions, 262 flow [2023-08-29 23:06:49,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:06:49,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 125 transitions, 262 flow [2023-08-29 23:06:49,519 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 125 transitions, 262 flow [2023-08-29 23:06:49,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 125 transitions, 262 flow [2023-08-29 23:06:49,541 INFO L130 PetriNetUnfolder]: 9/125 cut-off events. [2023-08-29 23:06:49,541 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:06:49,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 9/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-29 23:06:49,543 INFO L119 LiptonReduction]: Number of co-enabled transitions 972 [2023-08-29 23:06:52,474 INFO L134 LiptonReduction]: Checked pairs total: 946 [2023-08-29 23:06:52,474 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-29 23:06:52,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:06:52,491 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;@3c6753c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:06:52,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-29 23:06:52,493 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 23:06:52,494 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:06:52,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:52,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:06:52,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:52,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash 486, now seen corresponding path program 1 times [2023-08-29 23:06:52,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:52,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289677967] [2023-08-29 23:06:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:52,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:52,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:52,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289677967] [2023-08-29 23:06:52,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289677967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:52,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:52,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:06:52,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173282674] [2023-08-29 23:06:52,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:52,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:06:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:06:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:06:52,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 258 [2023-08-29 23:06:52,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:52,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 258 [2023-08-29 23:06:52,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:52,617 INFO L130 PetriNetUnfolder]: 75/122 cut-off events. [2023-08-29 23:06:52,617 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-29 23:06:52,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 122 events. 75/122 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 266 event pairs, 35 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 210. Up to 123 conditions per place. [2023-08-29 23:06:52,619 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-29 23:06:52,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 96 flow [2023-08-29 23:06:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:06:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:06:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 264 transitions. [2023-08-29 23:06:52,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2023-08-29 23:06:52,637 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 264 transitions. [2023-08-29 23:06:52,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 264 transitions. [2023-08-29 23:06:52,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:52,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 264 transitions. [2023-08-29 23:06:52,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,652 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,654 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 60 flow. Second operand 2 states and 264 transitions. [2023-08-29 23:06:52,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 96 flow [2023-08-29 23:06:52,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:06:52,659 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2023-08-29 23:06:52,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2023-08-29 23:06:52,664 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-29 23:06:52,665 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2023-08-29 23:06:52,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:52,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:06:52,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:06:52,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:52,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 478579, now seen corresponding path program 1 times [2023-08-29 23:06:52,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:52,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202114239] [2023-08-29 23:06:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:52,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:52,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:52,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202114239] [2023-08-29 23:06:52,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202114239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:52,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:52,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:06:52,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126881685] [2023-08-29 23:06:52,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:52,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:06:52,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:06:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:06:52,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 258 [2023-08-29 23:06:52,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:52,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 258 [2023-08-29 23:06:52,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:52,929 INFO L130 PetriNetUnfolder]: 69/111 cut-off events. [2023-08-29 23:06:52,929 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:06:52,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 111 events. 69/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 236 event pairs, 32 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 226. Up to 111 conditions per place. [2023-08-29 23:06:52,930 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-29 23:06:52,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 80 flow [2023-08-29 23:06:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:06:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:06:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-29 23:06:52,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2023-08-29 23:06:52,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-29 23:06:52,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-29 23:06:52,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:52,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-29 23:06:52,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:52,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:52,943 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 366 transitions. [2023-08-29 23:06:52,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 80 flow [2023-08-29 23:06:52,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:06:52,944 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 44 flow [2023-08-29 23:06:52,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-08-29 23:06:52,945 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-29 23:06:52,945 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 44 flow [2023-08-29 23:06:52,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:52,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:06:52,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:06:52,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:52,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:52,951 INFO L85 PathProgramCache]: Analyzing trace with hash 478578, now seen corresponding path program 1 times [2023-08-29 23:06:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:52,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880185667] [2023-08-29 23:06:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:52,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:53,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:53,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880185667] [2023-08-29 23:06:53,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880185667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:53,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:53,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:06:53,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732321919] [2023-08-29 23:06:53,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:53,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:06:53,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:06:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:06:53,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 258 [2023-08-29 23:06:53,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:53,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 258 [2023-08-29 23:06:53,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:53,060 INFO L130 PetriNetUnfolder]: 63/100 cut-off events. [2023-08-29 23:06:53,060 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:06:53,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 100 events. 63/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 200 event pairs, 29 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 205. Up to 100 conditions per place. [2023-08-29 23:06:53,061 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-29 23:06:53,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2023-08-29 23:06:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:06:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:06:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-29 23:06:53,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2023-08-29 23:06:53,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-29 23:06:53,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-29 23:06:53,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:53,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-29 23:06:53,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:53,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:53,065 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 44 flow. Second operand 3 states and 352 transitions. [2023-08-29 23:06:53,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2023-08-29 23:06:53,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:06:53,066 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 41 flow [2023-08-29 23:06:53,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-29 23:06:53,067 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2023-08-29 23:06:53,067 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 41 flow [2023-08-29 23:06:53,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:53,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:06:53,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:06:53,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:53,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash 459922979, now seen corresponding path program 1 times [2023-08-29 23:06:53,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:53,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045838207] [2023-08-29 23:06:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:53,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:53,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045838207] [2023-08-29 23:06:53,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045838207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:53,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:53,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:06:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115228050] [2023-08-29 23:06:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:53,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:06:53,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:06:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:06:53,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 258 [2023-08-29 23:06:53,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:53,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 258 [2023-08-29 23:06:53,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:53,224 INFO L130 PetriNetUnfolder]: 49/80 cut-off events. [2023-08-29 23:06:53,225 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:06:53,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 80 events. 49/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 141 event pairs, 22 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 166. Up to 80 conditions per place. [2023-08-29 23:06:53,225 INFO L137 encePairwiseOnDemand]: 256/258 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-29 23:06:53,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 16 transitions, 71 flow [2023-08-29 23:06:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:06:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:06:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-08-29 23:06:53,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2023-08-29 23:06:53,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-08-29 23:06:53,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-08-29 23:06:53,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:53,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-08-29 23:06:53,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:53,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:53,230 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 41 flow. Second operand 3 states and 356 transitions. [2023-08-29 23:06:53,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 16 transitions, 71 flow [2023-08-29 23:06:53,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:06:53,231 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 40 flow [2023-08-29 23:06:53,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=21, PETRI_TRANSITIONS=16} [2023-08-29 23:06:53,231 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2023-08-29 23:06:53,232 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 40 flow [2023-08-29 23:06:53,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:53,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:06:53,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:06:53,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:53,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:53,233 INFO L85 PathProgramCache]: Analyzing trace with hash 459922978, now seen corresponding path program 1 times [2023-08-29 23:06:53,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:53,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679445270] [2023-08-29 23:06:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:53,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:53,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:53,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679445270] [2023-08-29 23:06:53,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679445270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:53,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:53,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:06:53,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13700951] [2023-08-29 23:06:53,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:53,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:06:53,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:06:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:06:53,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 258 [2023-08-29 23:06:53,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:53,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 258 [2023-08-29 23:06:53,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:53,342 INFO L130 PetriNetUnfolder]: 35/60 cut-off events. [2023-08-29 23:06:53,342 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:06:53,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 60 events. 35/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 15 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 127. Up to 60 conditions per place. [2023-08-29 23:06:53,343 INFO L137 encePairwiseOnDemand]: 256/258 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-29 23:06:53,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 15 transitions, 68 flow [2023-08-29 23:06:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:06:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:06:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 337 transitions. [2023-08-29 23:06:53,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354005167958656 [2023-08-29 23:06:53,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 337 transitions. [2023-08-29 23:06:53,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 337 transitions. [2023-08-29 23:06:53,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:53,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 337 transitions. [2023-08-29 23:06:53,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 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) [2023-08-29 23:06:53,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:53,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:53,347 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 40 flow. Second operand 3 states and 337 transitions. [2023-08-29 23:06:53,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 15 transitions, 68 flow [2023-08-29 23:06:53,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:06:53,348 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 39 flow [2023-08-29 23:06:53,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-29 23:06:53,349 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2023-08-29 23:06:53,349 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 39 flow [2023-08-29 23:06:53,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:53,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:06:53,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:06:53,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:53,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1323423244, now seen corresponding path program 1 times [2023-08-29 23:06:53,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:53,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044603535] [2023-08-29 23:06:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:53,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:53,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044603535] [2023-08-29 23:06:53,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044603535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:53,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:53,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:06:53,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111790997] [2023-08-29 23:06:53,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:53,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:06:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:06:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:06:53,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 258 [2023-08-29 23:06:53,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:53,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 258 [2023-08-29 23:06:53,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:53,496 INFO L130 PetriNetUnfolder]: 69/117 cut-off events. [2023-08-29 23:06:53,496 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:06:53,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 117 events. 69/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 287 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 245. Up to 73 conditions per place. [2023-08-29 23:06:53,497 INFO L137 encePairwiseOnDemand]: 254/258 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-08-29 23:06:53,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 120 flow [2023-08-29 23:06:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:06:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:06:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-29 23:06:53,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2023-08-29 23:06:53,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-29 23:06:53,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-29 23:06:53,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:53,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-29 23:06:53,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:53,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 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) [2023-08-29 23:06:53,502 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 39 flow. Second operand 3 states and 370 transitions. [2023-08-29 23:06:53,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 120 flow [2023-08-29 23:06:53,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:06:53,503 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 57 flow [2023-08-29 23:06:53,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-29 23:06:53,504 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-29 23:06:53,504 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 57 flow [2023-08-29 23:06:53,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:53,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:06:53,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:06:53,505 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:53,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1533294240, now seen corresponding path program 1 times [2023-08-29 23:06:53,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:53,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329852062] [2023-08-29 23:06:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:53,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329852062] [2023-08-29 23:06:53,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329852062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:53,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:53,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:06:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268440426] [2023-08-29 23:06:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:06:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:06:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:06:53,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:06:53,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:53,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:06:53,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:53,630 INFO L130 PetriNetUnfolder]: 125/216 cut-off events. [2023-08-29 23:06:53,631 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-29 23:06:53,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 216 events. 125/216 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 680 event pairs, 11 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 522. Up to 79 conditions per place. [2023-08-29 23:06:53,632 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 40 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2023-08-29 23:06:53,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 49 transitions, 246 flow [2023-08-29 23:06:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:06:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:06:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 584 transitions. [2023-08-29 23:06:53,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45271317829457364 [2023-08-29 23:06:53,634 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 584 transitions. [2023-08-29 23:06:53,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 584 transitions. [2023-08-29 23:06:53,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:53,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 584 transitions. [2023-08-29 23:06:53,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,637 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,638 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 57 flow. Second operand 5 states and 584 transitions. [2023-08-29 23:06:53,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 49 transitions, 246 flow [2023-08-29 23:06:53,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 49 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:06:53,639 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 105 flow [2023-08-29 23:06:53,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-29 23:06:53,640 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-08-29 23:06:53,640 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 105 flow [2023-08-29 23:06:53,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:53,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:06:53,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 23:06:53,641 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:53,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:53,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1474401878, now seen corresponding path program 2 times [2023-08-29 23:06:53,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:53,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282778628] [2023-08-29 23:06:53,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:53,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:53,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282778628] [2023-08-29 23:06:53,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282778628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:53,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:53,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:06:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596649274] [2023-08-29 23:06:53,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:53,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:06:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:06:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:06:53,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:06:53,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:53,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:06:53,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:53,751 INFO L130 PetriNetUnfolder]: 125/210 cut-off events. [2023-08-29 23:06:53,751 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-29 23:06:53,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 210 events. 125/210 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 638 event pairs, 17 based on Foata normal form. 4/214 useless extension candidates. Maximal degree in co-relation 654. Up to 92 conditions per place. [2023-08-29 23:06:53,753 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 32 selfloop transitions, 11 changer transitions 6/49 dead transitions. [2023-08-29 23:06:53,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 305 flow [2023-08-29 23:06:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:06:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:06:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2023-08-29 23:06:53,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2023-08-29 23:06:53,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2023-08-29 23:06:53,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2023-08-29 23:06:53,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:53,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2023-08-29 23:06:53,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,758 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,758 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 105 flow. Second operand 5 states and 579 transitions. [2023-08-29 23:06:53,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 305 flow [2023-08-29 23:06:53,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 305 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:06:53,760 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 170 flow [2023-08-29 23:06:53,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-29 23:06:53,761 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2023-08-29 23:06:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 170 flow [2023-08-29 23:06:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:53,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:06:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 23:06:53,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:53,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1824564861, now seen corresponding path program 1 times [2023-08-29 23:06:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230694336] [2023-08-29 23:06:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:53,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:06:53,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230694336] [2023-08-29 23:06:53,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230694336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:06:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359993789] [2023-08-29 23:06:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:53,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:06:53,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:06:53,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:06:53,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 23:06:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:53,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:06:53,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:06:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:06:53,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:06:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:06:53,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359993789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:06:53,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:06:53,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-29 23:06:53,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916945808] [2023-08-29 23:06:53,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:06:53,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:06:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:06:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:06:53,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:06:53,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:53,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:53,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:06:53,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:54,097 INFO L130 PetriNetUnfolder]: 131/230 cut-off events. [2023-08-29 23:06:54,098 INFO L131 PetriNetUnfolder]: For 345/345 co-relation queries the response was YES. [2023-08-29 23:06:54,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 230 events. 131/230 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 731 event pairs, 2 based on Foata normal form. 20/250 useless extension candidates. Maximal degree in co-relation 861. Up to 96 conditions per place. [2023-08-29 23:06:54,099 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 43 selfloop transitions, 9 changer transitions 4/56 dead transitions. [2023-08-29 23:06:54,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 419 flow [2023-08-29 23:06:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:06:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:06:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 583 transitions. [2023-08-29 23:06:54,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45193798449612405 [2023-08-29 23:06:54,101 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 583 transitions. [2023-08-29 23:06:54,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 583 transitions. [2023-08-29 23:06:54,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:54,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 583 transitions. [2023-08-29 23:06:54,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:54,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:54,105 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:54,105 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 170 flow. Second operand 5 states and 583 transitions. [2023-08-29 23:06:54,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 419 flow [2023-08-29 23:06:54,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 413 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 23:06:54,108 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 242 flow [2023-08-29 23:06:54,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-29 23:06:54,108 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2023-08-29 23:06:54,109 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 242 flow [2023-08-29 23:06:54,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:54,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:54,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:06:54,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 23:06:54,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:06:54,328 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:54,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -435410164, now seen corresponding path program 1 times [2023-08-29 23:06:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131648631] [2023-08-29 23:06:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:54,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:54,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131648631] [2023-08-29 23:06:54,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131648631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:06:54,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747191253] [2023-08-29 23:06:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:54,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:06:54,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:06:54,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:06:54,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 23:06:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:06:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:06:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:57,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:06:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:57,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747191253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:06:57,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:06:57,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 23:06:57,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357192967] [2023-08-29 23:06:57,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:06:57,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:06:57,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:57,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:06:57,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=101, Unknown=1, NotChecked=0, Total=156 [2023-08-29 23:06:58,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-08-29 23:06:58,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 98.0) internal successors, (1274), 13 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:58,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:58,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-08-29 23:06:58,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:59,013 INFO L130 PetriNetUnfolder]: 260/455 cut-off events. [2023-08-29 23:06:59,013 INFO L131 PetriNetUnfolder]: For 832/832 co-relation queries the response was YES. [2023-08-29 23:06:59,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 455 events. 260/455 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1800 event pairs, 12 based on Foata normal form. 14/469 useless extension candidates. Maximal degree in co-relation 1870. Up to 184 conditions per place. [2023-08-29 23:06:59,015 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 65 selfloop transitions, 19 changer transitions 23/107 dead transitions. [2023-08-29 23:06:59,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 107 transitions, 909 flow [2023-08-29 23:06:59,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:06:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:06:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 934 transitions. [2023-08-29 23:06:59,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40223944875107664 [2023-08-29 23:06:59,018 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 934 transitions. [2023-08-29 23:06:59,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 934 transitions. [2023-08-29 23:06:59,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:59,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 934 transitions. [2023-08-29 23:06:59,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:59,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 258.0) internal successors, (2580), 10 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) [2023-08-29 23:06:59,023 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 258.0) internal successors, (2580), 10 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) [2023-08-29 23:06:59,023 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 242 flow. Second operand 9 states and 934 transitions. [2023-08-29 23:06:59,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 107 transitions, 909 flow [2023-08-29 23:06:59,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 107 transitions, 899 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 23:06:59,027 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 428 flow [2023-08-29 23:06:59,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-29 23:06:59,027 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2023-08-29 23:06:59,027 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 428 flow [2023-08-29 23:06:59,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.0) internal successors, (1274), 13 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:59,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:59,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:06:59,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:06:59,233 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,SelfDestructingSolverStorable9 [2023-08-29 23:06:59,233 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:59,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:59,234 INFO L85 PathProgramCache]: Analyzing trace with hash 661680455, now seen corresponding path program 2 times [2023-08-29 23:06:59,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:59,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027314563] [2023-08-29 23:06:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:06:59,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:59,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027314563] [2023-08-29 23:06:59,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027314563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:59,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:59,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:06:59,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413211015] [2023-08-29 23:06:59,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:59,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:06:59,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:06:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:06:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:06:59,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:06:59,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:59,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:59,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:06:59,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:59,434 INFO L130 PetriNetUnfolder]: 204/350 cut-off events. [2023-08-29 23:06:59,435 INFO L131 PetriNetUnfolder]: For 1126/1126 co-relation queries the response was YES. [2023-08-29 23:06:59,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1653 conditions, 350 events. 204/350 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1191 event pairs, 29 based on Foata normal form. 2/352 useless extension candidates. Maximal degree in co-relation 1632. Up to 152 conditions per place. [2023-08-29 23:06:59,437 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 55 selfloop transitions, 12 changer transitions 2/69 dead transitions. [2023-08-29 23:06:59,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 709 flow [2023-08-29 23:06:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:06:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:06:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2023-08-29 23:06:59,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2023-08-29 23:06:59,440 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2023-08-29 23:06:59,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2023-08-29 23:06:59,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:59,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2023-08-29 23:06:59,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:59,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:59,444 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:59,444 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 428 flow. Second operand 5 states and 576 transitions. [2023-08-29 23:06:59,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 709 flow [2023-08-29 23:06:59,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 652 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-08-29 23:06:59,448 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 464 flow [2023-08-29 23:06:59,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-08-29 23:06:59,448 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 29 predicate places. [2023-08-29 23:06:59,448 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 464 flow [2023-08-29 23:06:59,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:59,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:59,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:06:59,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 23:06:59,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:06:59,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:59,450 INFO L85 PathProgramCache]: Analyzing trace with hash 989482668, now seen corresponding path program 2 times [2023-08-29 23:06:59,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:06:59,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243566349] [2023-08-29 23:06:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:59,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:06:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:59,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:06:59,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243566349] [2023-08-29 23:06:59,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243566349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:06:59,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659925028] [2023-08-29 23:06:59,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:06:59,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:06:59,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:06:59,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:06:59,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 23:06:59,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:06:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:06:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:06:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:00,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:00,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659925028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:00,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:00,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 23:07:00,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329864795] [2023-08-29 23:07:00,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:00,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:07:00,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:00,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:07:00,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:07:00,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:07:00,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 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) [2023-08-29 23:07:00,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:00,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:07:00,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:02,370 INFO L130 PetriNetUnfolder]: 728/1252 cut-off events. [2023-08-29 23:07:02,370 INFO L131 PetriNetUnfolder]: For 5158/5158 co-relation queries the response was YES. [2023-08-29 23:07:02,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5860 conditions, 1252 events. 728/1252 cut-off events. For 5158/5158 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6147 event pairs, 72 based on Foata normal form. 8/1260 useless extension candidates. Maximal degree in co-relation 5836. Up to 337 conditions per place. [2023-08-29 23:07:02,379 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 161 selfloop transitions, 95 changer transitions 12/268 dead transitions. [2023-08-29 23:07:02,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 268 transitions, 2630 flow [2023-08-29 23:07:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-29 23:07:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-29 23:07:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2126 transitions. [2023-08-29 23:07:02,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43370053039575684 [2023-08-29 23:07:02,384 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2126 transitions. [2023-08-29 23:07:02,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2126 transitions. [2023-08-29 23:07:02,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:02,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2126 transitions. [2023-08-29 23:07:02,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.89473684210526) internal successors, (2126), 19 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:02,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 258.0) internal successors, (5160), 20 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:02,394 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 258.0) internal successors, (5160), 20 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:02,394 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 464 flow. Second operand 19 states and 2126 transitions. [2023-08-29 23:07:02,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 268 transitions, 2630 flow [2023-08-29 23:07:02,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 268 transitions, 2520 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-08-29 23:07:02,431 INFO L231 Difference]: Finished difference. Result has 86 places, 143 transitions, 1677 flow [2023-08-29 23:07:02,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1677, PETRI_PLACES=86, PETRI_TRANSITIONS=143} [2023-08-29 23:07:02,433 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2023-08-29 23:07:02,433 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 143 transitions, 1677 flow [2023-08-29 23:07:02,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 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) [2023-08-29 23:07:02,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:02,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:07:02,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 23:07:02,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:02,639 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:02,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash -208889644, now seen corresponding path program 3 times [2023-08-29 23:07:02,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:02,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890241523] [2023-08-29 23:07:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:02,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:02,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890241523] [2023-08-29 23:07:02,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890241523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:07:02,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986075688] [2023-08-29 23:07:02,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:07:02,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:02,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:07:02,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 23:07:03,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:07:03,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:07:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:07:03,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:03,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:03,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986075688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:03,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:03,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 23:07:03,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470954997] [2023-08-29 23:07:03,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:03,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:07:03,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:03,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:07:03,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:07:03,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:07:03,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 143 transitions, 1677 flow. Second operand has 13 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 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) [2023-08-29 23:07:03,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:03,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:07:03,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:04,226 INFO L130 PetriNetUnfolder]: 1241/2113 cut-off events. [2023-08-29 23:07:04,227 INFO L131 PetriNetUnfolder]: For 11612/11612 co-relation queries the response was YES. [2023-08-29 23:07:04,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11558 conditions, 2113 events. 1241/2113 cut-off events. For 11612/11612 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11434 event pairs, 142 based on Foata normal form. 5/2118 useless extension candidates. Maximal degree in co-relation 11522. Up to 646 conditions per place. [2023-08-29 23:07:04,241 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 182 selfloop transitions, 119 changer transitions 11/312 dead transitions. [2023-08-29 23:07:04,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 312 transitions, 4049 flow [2023-08-29 23:07:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 23:07:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 23:07:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-08-29 23:07:04,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294573643410853 [2023-08-29 23:07:04,244 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-08-29 23:07:04,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-08-29 23:07:04,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:04,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-08-29 23:07:04,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:04,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:04,249 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:04,249 INFO L175 Difference]: Start difference. First operand has 86 places, 143 transitions, 1677 flow. Second operand 10 states and 1108 transitions. [2023-08-29 23:07:04,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 312 transitions, 4049 flow [2023-08-29 23:07:04,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 312 transitions, 3715 flow, removed 164 selfloop flow, removed 2 redundant places. [2023-08-29 23:07:04,296 INFO L231 Difference]: Finished difference. Result has 97 places, 218 transitions, 2814 flow [2023-08-29 23:07:04,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2814, PETRI_PLACES=97, PETRI_TRANSITIONS=218} [2023-08-29 23:07:04,296 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 69 predicate places. [2023-08-29 23:07:04,297 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 218 transitions, 2814 flow [2023-08-29 23:07:04,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 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) [2023-08-29 23:07:04,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:04,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:07:04,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:07:04,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:04,508 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:04,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:04,509 INFO L85 PathProgramCache]: Analyzing trace with hash 952394115, now seen corresponding path program 1 times [2023-08-29 23:07:04,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:04,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684597368] [2023-08-29 23:07:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:04,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:04,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:04,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684597368] [2023-08-29 23:07:04,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684597368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:07:04,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167073495] [2023-08-29 23:07:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:04,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:04,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:04,569 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:07:04,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 23:07:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:07:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:04,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:04,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167073495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:04,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:04,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-29 23:07:04,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241582356] [2023-08-29 23:07:04,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:04,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:07:04,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:07:04,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:07:04,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:07:04,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 218 transitions, 2814 flow. Second operand has 10 states, 10 states have (on average 110.7) internal successors, (1107), 10 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:04,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:04,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:07:04,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:05,412 INFO L130 PetriNetUnfolder]: 2095/3657 cut-off events. [2023-08-29 23:07:05,412 INFO L131 PetriNetUnfolder]: For 24748/24748 co-relation queries the response was YES. [2023-08-29 23:07:05,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20810 conditions, 3657 events. 2095/3657 cut-off events. For 24748/24748 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23180 event pairs, 31 based on Foata normal form. 76/3733 useless extension candidates. Maximal degree in co-relation 20769. Up to 839 conditions per place. [2023-08-29 23:07:05,437 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 377 selfloop transitions, 142 changer transitions 1/520 dead transitions. [2023-08-29 23:07:05,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 520 transitions, 7187 flow [2023-08-29 23:07:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:07:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:07:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2023-08-29 23:07:05,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44735142118863047 [2023-08-29 23:07:05,440 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2023-08-29 23:07:05,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2023-08-29 23:07:05,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:05,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2023-08-29 23:07:05,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.41666666666667) internal successors, (1385), 12 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:05,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:05,447 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:05,447 INFO L175 Difference]: Start difference. First operand has 97 places, 218 transitions, 2814 flow. Second operand 12 states and 1385 transitions. [2023-08-29 23:07:05,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 520 transitions, 7187 flow [2023-08-29 23:07:05,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 520 transitions, 6927 flow, removed 105 selfloop flow, removed 6 redundant places. [2023-08-29 23:07:05,501 INFO L231 Difference]: Finished difference. Result has 110 places, 310 transitions, 4643 flow [2023-08-29 23:07:05,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=2719, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4643, PETRI_PLACES=110, PETRI_TRANSITIONS=310} [2023-08-29 23:07:05,502 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 82 predicate places. [2023-08-29 23:07:05,502 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 310 transitions, 4643 flow [2023-08-29 23:07:05,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.7) internal successors, (1107), 10 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:05,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:05,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:07:05,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:07:05,707 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,SelfDestructingSolverStorable13 [2023-08-29 23:07:05,709 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:05,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash 250208241, now seen corresponding path program 2 times [2023-08-29 23:07:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:05,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068791395] [2023-08-29 23:07:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:05,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:05,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:05,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068791395] [2023-08-29 23:07:05,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068791395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:07:05,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287006303] [2023-08-29 23:07:05,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:07:05,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:05,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:05,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:07:05,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 23:07:05,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:07:05,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:07:05,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:07:05,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:05,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:05,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287006303] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:05,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:05,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-29 23:07:05,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7627623] [2023-08-29 23:07:05,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:05,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:07:05,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:05,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:07:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:07:05,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:07:05,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 310 transitions, 4643 flow. Second operand has 9 states, 9 states have (on average 111.11111111111111) internal successors, (1000), 9 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:05,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:05,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:07:05,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:06,726 INFO L130 PetriNetUnfolder]: 2380/4334 cut-off events. [2023-08-29 23:07:06,726 INFO L131 PetriNetUnfolder]: For 38047/38047 co-relation queries the response was YES. [2023-08-29 23:07:06,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27669 conditions, 4334 events. 2380/4334 cut-off events. For 38047/38047 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29526 event pairs, 178 based on Foata normal form. 32/4366 useless extension candidates. Maximal degree in co-relation 27621. Up to 1311 conditions per place. [2023-08-29 23:07:06,757 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 294 selfloop transitions, 275 changer transitions 0/569 dead transitions. [2023-08-29 23:07:06,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 569 transitions, 9052 flow [2023-08-29 23:07:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:07:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:07:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1609 transitions. [2023-08-29 23:07:06,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545957918050944 [2023-08-29 23:07:06,761 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1609 transitions. [2023-08-29 23:07:06,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1609 transitions. [2023-08-29 23:07:06,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:06,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1609 transitions. [2023-08-29 23:07:06,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.92857142857143) internal successors, (1609), 14 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:06,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:06,776 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:06,777 INFO L175 Difference]: Start difference. First operand has 110 places, 310 transitions, 4643 flow. Second operand 14 states and 1609 transitions. [2023-08-29 23:07:06,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 569 transitions, 9052 flow [2023-08-29 23:07:06,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 569 transitions, 8633 flow, removed 203 selfloop flow, removed 2 redundant places. [2023-08-29 23:07:06,966 INFO L231 Difference]: Finished difference. Result has 127 places, 412 transitions, 6800 flow [2023-08-29 23:07:06,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=4328, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6800, PETRI_PLACES=127, PETRI_TRANSITIONS=412} [2023-08-29 23:07:06,966 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 99 predicate places. [2023-08-29 23:07:06,966 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 412 transitions, 6800 flow [2023-08-29 23:07:06,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.11111111111111) internal successors, (1000), 9 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:06,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:06,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:07:06,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:07:07,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 23:07:07,173 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:07,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1414835732, now seen corresponding path program 3 times [2023-08-29 23:07:07,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:07,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949509537] [2023-08-29 23:07:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:07,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:07,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:07,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949509537] [2023-08-29 23:07:07,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949509537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:07:07,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350717549] [2023-08-29 23:07:07,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:07:07,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:07,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:07:07,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 23:07:07,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:07:07,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:07:07,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:07:07,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:08,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:08,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350717549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:08,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:08,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-29 23:07:08,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239146256] [2023-08-29 23:07:08,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:08,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:07:08,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:07:08,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:07:09,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:07:09,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 412 transitions, 6800 flow. Second operand has 19 states, 19 states have (on average 105.36842105263158) internal successors, (2002), 19 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:09,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:09,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:07:09,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:11,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:15,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:20,070 INFO L130 PetriNetUnfolder]: 3298/5950 cut-off events. [2023-08-29 23:07:20,070 INFO L131 PetriNetUnfolder]: For 64712/64712 co-relation queries the response was YES. [2023-08-29 23:07:20,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40263 conditions, 5950 events. 3298/5950 cut-off events. For 64712/64712 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42191 event pairs, 258 based on Foata normal form. 18/5968 useless extension candidates. Maximal degree in co-relation 40210. Up to 2691 conditions per place. [2023-08-29 23:07:20,115 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 368 selfloop transitions, 434 changer transitions 21/823 dead transitions. [2023-08-29 23:07:20,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 823 transitions, 14470 flow [2023-08-29 23:07:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-29 23:07:20,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-29 23:07:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2759 transitions. [2023-08-29 23:07:20,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277519379844961 [2023-08-29 23:07:20,120 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2759 transitions. [2023-08-29 23:07:20,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2759 transitions. [2023-08-29 23:07:20,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:20,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2759 transitions. [2023-08-29 23:07:20,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 110.36) internal successors, (2759), 25 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:20,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:20,131 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:20,131 INFO L175 Difference]: Start difference. First operand has 127 places, 412 transitions, 6800 flow. Second operand 25 states and 2759 transitions. [2023-08-29 23:07:20,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 823 transitions, 14470 flow [2023-08-29 23:07:20,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 823 transitions, 14007 flow, removed 224 selfloop flow, removed 2 redundant places. [2023-08-29 23:07:20,486 INFO L231 Difference]: Finished difference. Result has 157 places, 661 transitions, 12803 flow [2023-08-29 23:07:20,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=6617, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12803, PETRI_PLACES=157, PETRI_TRANSITIONS=661} [2023-08-29 23:07:20,487 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 129 predicate places. [2023-08-29 23:07:20,487 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 661 transitions, 12803 flow [2023-08-29 23:07:20,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.36842105263158) internal successors, (2002), 19 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:20,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:20,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:07:20,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:07:20,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:20,692 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:20,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:20,709 INFO L85 PathProgramCache]: Analyzing trace with hash -373306196, now seen corresponding path program 4 times [2023-08-29 23:07:20,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:20,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362747207] [2023-08-29 23:07:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:21,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:21,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362747207] [2023-08-29 23:07:21,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362747207] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:07:21,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810224546] [2023-08-29 23:07:21,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:07:21,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:21,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:21,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:07:21,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 23:07:21,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:07:21,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:07:21,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:07:21,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:21,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:07:22,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810224546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:22,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:22,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-08-29 23:07:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949701976] [2023-08-29 23:07:22,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:07:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:07:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:07:25,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:26,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 258 [2023-08-29 23:07:26,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 661 transitions, 12803 flow. Second operand has 17 states, 17 states have (on average 104.52941176470588) internal successors, (1777), 17 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:26,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:26,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 258 [2023-08-29 23:07:26,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:28,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:33,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:34,913 INFO L130 PetriNetUnfolder]: 4155/7549 cut-off events. [2023-08-29 23:07:34,914 INFO L131 PetriNetUnfolder]: For 100191/100191 co-relation queries the response was YES. [2023-08-29 23:07:34,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55348 conditions, 7549 events. 4155/7549 cut-off events. For 100191/100191 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56489 event pairs, 382 based on Foata normal form. 14/7563 useless extension candidates. Maximal degree in co-relation 55287. Up to 5575 conditions per place. [2023-08-29 23:07:34,964 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 774 selfloop transitions, 235 changer transitions 29/1038 dead transitions. [2023-08-29 23:07:34,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 1038 transitions, 20728 flow [2023-08-29 23:07:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:07:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:07:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2337 transitions. [2023-08-29 23:07:34,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43133997785160577 [2023-08-29 23:07:34,967 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2337 transitions. [2023-08-29 23:07:34,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2337 transitions. [2023-08-29 23:07:34,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:34,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2337 transitions. [2023-08-29 23:07:34,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 111.28571428571429) internal successors, (2337), 21 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:34,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:34,974 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:34,974 INFO L175 Difference]: Start difference. First operand has 157 places, 661 transitions, 12803 flow. Second operand 21 states and 2337 transitions. [2023-08-29 23:07:34,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 1038 transitions, 20728 flow [2023-08-29 23:07:35,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 1038 transitions, 18937 flow, removed 889 selfloop flow, removed 4 redundant places. [2023-08-29 23:07:35,746 INFO L231 Difference]: Finished difference. Result has 184 places, 823 transitions, 15597 flow [2023-08-29 23:07:35,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=11594, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15597, PETRI_PLACES=184, PETRI_TRANSITIONS=823} [2023-08-29 23:07:35,746 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 156 predicate places. [2023-08-29 23:07:35,746 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 823 transitions, 15597 flow [2023-08-29 23:07:35,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 104.52941176470588) internal successors, (1777), 17 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:35,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:35,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:07:35,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:07:35,951 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,SelfDestructingSolverStorable16 [2023-08-29 23:07:35,952 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:35,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash -606026843, now seen corresponding path program 5 times [2023-08-29 23:07:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:35,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621282429] [2023-08-29 23:07:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:35,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:35,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621282429] [2023-08-29 23:07:35,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621282429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:07:35,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481419970] [2023-08-29 23:07:35,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:07:35,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:36,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:36,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:07:36,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 23:07:36,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 23:07:36,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:07:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:07:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:36,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:36,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481419970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:36,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:36,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-29 23:07:36,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677685695] [2023-08-29 23:07:36,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:36,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:07:36,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:36,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:07:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:07:36,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:07:36,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 823 transitions, 15597 flow. Second operand has 10 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:36,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:36,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:07:36,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:38,481 INFO L130 PetriNetUnfolder]: 4987/8938 cut-off events. [2023-08-29 23:07:38,481 INFO L131 PetriNetUnfolder]: For 123092/123092 co-relation queries the response was YES. [2023-08-29 23:07:38,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66255 conditions, 8938 events. 4987/8938 cut-off events. For 123092/123092 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 67600 event pairs, 392 based on Foata normal form. 152/9090 useless extension candidates. Maximal degree in co-relation 66183. Up to 3535 conditions per place. [2023-08-29 23:07:38,623 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 640 selfloop transitions, 621 changer transitions 0/1261 dead transitions. [2023-08-29 23:07:38,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 1261 transitions, 25355 flow [2023-08-29 23:07:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:07:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:07:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1608 transitions. [2023-08-29 23:07:38,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2023-08-29 23:07:38,625 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1608 transitions. [2023-08-29 23:07:38,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1608 transitions. [2023-08-29 23:07:38,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:38,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1608 transitions. [2023-08-29 23:07:38,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.85714285714286) internal successors, (1608), 14 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:38,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:38,639 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:38,639 INFO L175 Difference]: Start difference. First operand has 184 places, 823 transitions, 15597 flow. Second operand 14 states and 1608 transitions. [2023-08-29 23:07:38,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 1261 transitions, 25355 flow [2023-08-29 23:07:39,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1261 transitions, 24814 flow, removed 262 selfloop flow, removed 5 redundant places. [2023-08-29 23:07:39,684 INFO L231 Difference]: Finished difference. Result has 200 places, 1006 transitions, 21638 flow [2023-08-29 23:07:39,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=15185, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21638, PETRI_PLACES=200, PETRI_TRANSITIONS=1006} [2023-08-29 23:07:39,684 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 172 predicate places. [2023-08-29 23:07:39,685 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 1006 transitions, 21638 flow [2023-08-29 23:07:39,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:39,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:39,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:07:39,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-29 23:07:39,889 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,SelfDestructingSolverStorable17 [2023-08-29 23:07:39,889 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:39,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:39,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2109694988, now seen corresponding path program 6 times [2023-08-29 23:07:39,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:39,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382548531] [2023-08-29 23:07:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:40,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:40,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382548531] [2023-08-29 23:07:40,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382548531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:07:40,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518450052] [2023-08-29 23:07:40,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:07:40,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:40,185 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:07:40,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 23:07:40,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-29 23:07:40,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:07:40,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:07:40,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:40,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:40,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518450052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:40,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:40,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-08-29 23:07:40,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231198548] [2023-08-29 23:07:40,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:40,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:07:40,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:40,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:07:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:07:41,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:07:41,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 1006 transitions, 21638 flow. Second operand has 17 states, 17 states have (on average 105.52941176470588) internal successors, (1794), 17 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:41,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:41,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:07:41,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:46,980 INFO L130 PetriNetUnfolder]: 5767/10353 cut-off events. [2023-08-29 23:07:46,980 INFO L131 PetriNetUnfolder]: For 194177/194177 co-relation queries the response was YES. [2023-08-29 23:07:47,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85708 conditions, 10353 events. 5767/10353 cut-off events. For 194177/194177 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 80622 event pairs, 420 based on Foata normal form. 16/10369 useless extension candidates. Maximal degree in co-relation 85628. Up to 5331 conditions per place. [2023-08-29 23:07:47,169 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 488 selfloop transitions, 809 changer transitions 15/1312 dead transitions. [2023-08-29 23:07:47,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1312 transitions, 30064 flow [2023-08-29 23:07:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-29 23:07:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-29 23:07:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2208 transitions. [2023-08-29 23:07:47,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2023-08-29 23:07:47,180 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2208 transitions. [2023-08-29 23:07:47,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2208 transitions. [2023-08-29 23:07:47,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:47,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2208 transitions. [2023-08-29 23:07:47,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 110.4) internal successors, (2208), 20 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:47,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:47,186 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:47,186 INFO L175 Difference]: Start difference. First operand has 200 places, 1006 transitions, 21638 flow. Second operand 20 states and 2208 transitions. [2023-08-29 23:07:47,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 1312 transitions, 30064 flow [2023-08-29 23:07:48,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 1312 transitions, 29827 flow, removed 111 selfloop flow, removed 2 redundant places. [2023-08-29 23:07:48,915 INFO L231 Difference]: Finished difference. Result has 226 places, 1205 transitions, 29565 flow [2023-08-29 23:07:48,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=21439, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=29565, PETRI_PLACES=226, PETRI_TRANSITIONS=1205} [2023-08-29 23:07:48,915 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 198 predicate places. [2023-08-29 23:07:48,916 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 1205 transitions, 29565 flow [2023-08-29 23:07:48,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 105.52941176470588) internal successors, (1794), 17 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:48,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:48,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:07:48,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:07:49,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:49,120 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:49,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:49,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1647556379, now seen corresponding path program 7 times [2023-08-29 23:07:49,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:49,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122896741] [2023-08-29 23:07:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:49,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:49,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:49,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122896741] [2023-08-29 23:07:49,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122896741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:07:49,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959587396] [2023-08-29 23:07:49,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:07:49,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:49,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:49,225 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:07:49,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 23:07:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:49,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:07:49,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:49,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:49,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959587396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:49,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:49,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-29 23:07:49,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565663522] [2023-08-29 23:07:49,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:49,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:07:49,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:49,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:07:49,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:07:49,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:07:49,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 1205 transitions, 29565 flow. Second operand has 9 states, 9 states have (on average 111.22222222222223) internal successors, (1001), 9 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:49,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:49,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:07:49,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:53,195 INFO L130 PetriNetUnfolder]: 6200/11058 cut-off events. [2023-08-29 23:07:53,195 INFO L131 PetriNetUnfolder]: For 248463/248463 co-relation queries the response was YES. [2023-08-29 23:07:53,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98951 conditions, 11058 events. 6200/11058 cut-off events. For 248463/248463 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 87221 event pairs, 74 based on Foata normal form. 104/11162 useless extension candidates. Maximal degree in co-relation 98862. Up to 2950 conditions per place. [2023-08-29 23:07:53,295 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1143 selfloop transitions, 570 changer transitions 0/1713 dead transitions. [2023-08-29 23:07:53,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1713 transitions, 40954 flow [2023-08-29 23:07:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:07:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:07:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1716 transitions. [2023-08-29 23:07:53,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434108527131783 [2023-08-29 23:07:53,297 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1716 transitions. [2023-08-29 23:07:53,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1716 transitions. [2023-08-29 23:07:53,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:53,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1716 transitions. [2023-08-29 23:07:53,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 114.4) internal successors, (1716), 15 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:53,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:53,303 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:53,303 INFO L175 Difference]: Start difference. First operand has 226 places, 1205 transitions, 29565 flow. Second operand 15 states and 1716 transitions. [2023-08-29 23:07:53,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1713 transitions, 40954 flow [2023-08-29 23:07:55,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1713 transitions, 39715 flow, removed 609 selfloop flow, removed 6 redundant places. [2023-08-29 23:07:55,837 INFO L231 Difference]: Finished difference. Result has 236 places, 1292 transitions, 32451 flow [2023-08-29 23:07:55,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=28193, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=32451, PETRI_PLACES=236, PETRI_TRANSITIONS=1292} [2023-08-29 23:07:55,838 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 208 predicate places. [2023-08-29 23:07:55,838 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 1292 transitions, 32451 flow [2023-08-29 23:07:55,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.22222222222223) internal successors, (1001), 9 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:55,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:55,839 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:07:55,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:07:56,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:56,044 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:56,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1115834550, now seen corresponding path program 8 times [2023-08-29 23:07:56,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:56,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437857761] [2023-08-29 23:07:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:56,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437857761] [2023-08-29 23:07:56,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437857761] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:07:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131742594] [2023-08-29 23:07:56,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:07:56,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:07:56,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:56,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:07:56,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 23:07:56,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:07:56,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:07:56,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:07:56,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:56,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:07:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131742594] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:57,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:07:57,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-29 23:07:57,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800905919] [2023-08-29 23:07:57,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:57,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:07:57,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:57,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:07:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:07:57,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:07:57,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1292 transitions, 32451 flow. Second operand has 18 states, 18 states have (on average 105.38888888888889) internal successors, (1897), 18 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:57,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:57,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:07:57,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:03,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:08:10,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:08:15,580 INFO L130 PetriNetUnfolder]: 7344/13088 cut-off events. [2023-08-29 23:08:15,580 INFO L131 PetriNetUnfolder]: For 321078/321078 co-relation queries the response was YES. [2023-08-29 23:08:15,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122856 conditions, 13088 events. 7344/13088 cut-off events. For 321078/321078 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 105139 event pairs, 566 based on Foata normal form. 34/13122 useless extension candidates. Maximal degree in co-relation 122767. Up to 5997 conditions per place. [2023-08-29 23:08:15,734 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 573 selfloop transitions, 1178 changer transitions 21/1772 dead transitions. [2023-08-29 23:08:15,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1772 transitions, 47694 flow [2023-08-29 23:08:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 23:08:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 23:08:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2633 transitions. [2023-08-29 23:08:15,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252260981912145 [2023-08-29 23:08:15,739 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2633 transitions. [2023-08-29 23:08:15,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2633 transitions. [2023-08-29 23:08:15,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:15,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2633 transitions. [2023-08-29 23:08:15,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 109.70833333333333) internal successors, (2633), 24 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:15,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:15,770 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:15,770 INFO L175 Difference]: Start difference. First operand has 236 places, 1292 transitions, 32451 flow. Second operand 24 states and 2633 transitions. [2023-08-29 23:08:15,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1772 transitions, 47694 flow [2023-08-29 23:08:19,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1772 transitions, 47011 flow, removed 65 selfloop flow, removed 5 redundant places. [2023-08-29 23:08:19,301 INFO L231 Difference]: Finished difference. Result has 265 places, 1632 transitions, 46483 flow [2023-08-29 23:08:19,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=32024, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=862, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=46483, PETRI_PLACES=265, PETRI_TRANSITIONS=1632} [2023-08-29 23:08:19,303 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 237 predicate places. [2023-08-29 23:08:19,303 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 1632 transitions, 46483 flow [2023-08-29 23:08:19,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 105.38888888888889) internal successors, (1897), 18 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:19,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:19,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:19,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-29 23:08:19,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-29 23:08:19,508 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:19,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:19,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1560712288, now seen corresponding path program 9 times [2023-08-29 23:08:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:19,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757719839] [2023-08-29 23:08:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:19,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:19,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:19,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757719839] [2023-08-29 23:08:19,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757719839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:19,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734764993] [2023-08-29 23:08:19,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:08:19,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:19,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:19,829 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:19,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 23:08:20,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:08:20,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:08:20,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:20,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:20,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734764993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:20,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:20,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-29 23:08:20,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019204872] [2023-08-29 23:08:20,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:20,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:08:20,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:08:20,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:08:21,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:08:21,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 1632 transitions, 46483 flow. Second operand has 19 states, 19 states have (on average 105.26315789473684) internal successors, (2000), 19 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:21,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:08:21,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:31,870 INFO L130 PetriNetUnfolder]: 10591/18733 cut-off events. [2023-08-29 23:08:31,870 INFO L131 PetriNetUnfolder]: For 552636/552636 co-relation queries the response was YES. [2023-08-29 23:08:32,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192579 conditions, 18733 events. 10591/18733 cut-off events. For 552636/552636 co-relation queries the response was YES. Maximal size of possible extension queue 1323. Compared 157117 event pairs, 809 based on Foata normal form. 43/18776 useless extension candidates. Maximal degree in co-relation 192482. Up to 6872 conditions per place. [2023-08-29 23:08:32,206 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 774 selfloop transitions, 1912 changer transitions 34/2720 dead transitions. [2023-08-29 23:08:32,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 2720 transitions, 83217 flow [2023-08-29 23:08:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-29 23:08:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-29 23:08:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3839 transitions. [2023-08-29 23:08:32,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251384274640089 [2023-08-29 23:08:32,211 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3839 transitions. [2023-08-29 23:08:32,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3839 transitions. [2023-08-29 23:08:32,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:32,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3839 transitions. [2023-08-29 23:08:32,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 109.68571428571428) internal successors, (3839), 35 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:32,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 258.0) internal successors, (9288), 36 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:32,223 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 258.0) internal successors, (9288), 36 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:32,223 INFO L175 Difference]: Start difference. First operand has 265 places, 1632 transitions, 46483 flow. Second operand 35 states and 3839 transitions. [2023-08-29 23:08:32,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 2720 transitions, 83217 flow [2023-08-29 23:08:38,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 2720 transitions, 80183 flow, removed 1441 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:38,421 INFO L231 Difference]: Finished difference. Result has 311 places, 2467 transitions, 77934 flow [2023-08-29 23:08:38,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=44662, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=77934, PETRI_PLACES=311, PETRI_TRANSITIONS=2467} [2023-08-29 23:08:38,422 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 283 predicate places. [2023-08-29 23:08:38,422 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 2467 transitions, 77934 flow [2023-08-29 23:08:38,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.26315789473684) internal successors, (2000), 19 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:38,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:38,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:38,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-29 23:08:38,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-29 23:08:38,627 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:38,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:38,627 INFO L85 PathProgramCache]: Analyzing trace with hash -583609677, now seen corresponding path program 10 times [2023-08-29 23:08:38,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:38,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683237268] [2023-08-29 23:08:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:38,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:08:38,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:38,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683237268] [2023-08-29 23:08:38,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683237268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:38,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50574307] [2023-08-29 23:08:38,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:08:38,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:38,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:38,687 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:38,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-29 23:08:38,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:08:38,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:08:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:08:38,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:08:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50574307] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:38,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:38,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-29 23:08:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711320603] [2023-08-29 23:08:38,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:38,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:08:38,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:08:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:08:38,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 258 [2023-08-29 23:08:38,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 2467 transitions, 77934 flow. Second operand has 8 states, 8 states have (on average 115.125) internal successors, (921), 8 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:38,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:38,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 258 [2023-08-29 23:08:38,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:47,582 INFO L130 PetriNetUnfolder]: 8208/14661 cut-off events. [2023-08-29 23:08:47,583 INFO L131 PetriNetUnfolder]: For 540588/540588 co-relation queries the response was YES. [2023-08-29 23:08:47,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152234 conditions, 14661 events. 8208/14661 cut-off events. For 540588/540588 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 119793 event pairs, 618 based on Foata normal form. 956/15617 useless extension candidates. Maximal degree in co-relation 152122. Up to 9647 conditions per place. [2023-08-29 23:08:47,740 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 1578 selfloop transitions, 460 changer transitions 3/2041 dead transitions. [2023-08-29 23:08:47,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 2041 transitions, 67304 flow [2023-08-29 23:08:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:08:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:08:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-08-29 23:08:47,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465891472868217 [2023-08-29 23:08:47,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-08-29 23:08:47,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-08-29 23:08:47,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:47,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-08-29 23:08:47,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:47,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:47,743 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:47,744 INFO L175 Difference]: Start difference. First operand has 311 places, 2467 transitions, 77934 flow. Second operand 5 states and 601 transitions. [2023-08-29 23:08:47,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 2041 transitions, 67304 flow [2023-08-29 23:08:52,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 2041 transitions, 62425 flow, removed 1799 selfloop flow, removed 16 redundant places. [2023-08-29 23:08:52,434 INFO L231 Difference]: Finished difference. Result has 296 places, 1875 transitions, 56119 flow [2023-08-29 23:08:52,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=51626, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=56119, PETRI_PLACES=296, PETRI_TRANSITIONS=1875} [2023-08-29 23:08:52,436 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 268 predicate places. [2023-08-29 23:08:52,436 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 1875 transitions, 56119 flow [2023-08-29 23:08:52,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.125) internal successors, (921), 8 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:52,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:52,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:52,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-29 23:08:52,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:52,640 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:52,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:52,641 INFO L85 PathProgramCache]: Analyzing trace with hash -270961632, now seen corresponding path program 11 times [2023-08-29 23:08:52,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:52,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221642787] [2023-08-29 23:08:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:52,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:08:52,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:52,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221642787] [2023-08-29 23:08:52,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221642787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:52,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239711433] [2023-08-29 23:08:52,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:08:52,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:52,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:52,689 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:52,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-29 23:08:52,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 23:08:52,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:52,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:08:52,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:08:52,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:08:52,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239711433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:52,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:52,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-29 23:08:52,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949456583] [2023-08-29 23:08:52,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:52,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:08:52,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:52,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:08:52,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:08:52,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:08:52,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1875 transitions, 56119 flow. Second operand has 10 states, 10 states have (on average 111.4) internal successors, (1114), 10 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:52,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:52,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:08:52,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:00,567 INFO L130 PetriNetUnfolder]: 8444/15117 cut-off events. [2023-08-29 23:09:00,568 INFO L131 PetriNetUnfolder]: For 480153/480153 co-relation queries the response was YES. [2023-08-29 23:09:00,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152605 conditions, 15117 events. 8444/15117 cut-off events. For 480153/480153 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 123949 event pairs, 932 based on Foata normal form. 180/15297 useless extension candidates. Maximal degree in co-relation 152498. Up to 14013 conditions per place. [2023-08-29 23:09:00,736 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1887 selfloop transitions, 152 changer transitions 0/2039 dead transitions. [2023-08-29 23:09:00,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 2039 transitions, 63509 flow [2023-08-29 23:09:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:09:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:09:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1509 transitions. [2023-08-29 23:09:00,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44991055456171736 [2023-08-29 23:09:00,740 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1509 transitions. [2023-08-29 23:09:00,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1509 transitions. [2023-08-29 23:09:00,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:00,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1509 transitions. [2023-08-29 23:09:00,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 116.07692307692308) internal successors, (1509), 13 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:00,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 258.0) internal successors, (3612), 14 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:00,766 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 258.0) internal successors, (3612), 14 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:00,766 INFO L175 Difference]: Start difference. First operand has 296 places, 1875 transitions, 56119 flow. Second operand 13 states and 1509 transitions. [2023-08-29 23:09:00,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 2039 transitions, 63509 flow [2023-08-29 23:09:05,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 2039 transitions, 63357 flow, removed 76 selfloop flow, removed 0 redundant places. [2023-08-29 23:09:05,560 INFO L231 Difference]: Finished difference. Result has 315 places, 1943 transitions, 58552 flow [2023-08-29 23:09:05,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=55718, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=58552, PETRI_PLACES=315, PETRI_TRANSITIONS=1943} [2023-08-29 23:09:05,562 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 287 predicate places. [2023-08-29 23:09:05,562 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1943 transitions, 58552 flow [2023-08-29 23:09:05,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.4) internal successors, (1114), 10 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:05,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:05,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:05,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:05,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:05,767 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:05,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -461296608, now seen corresponding path program 12 times [2023-08-29 23:09:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:05,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143320425] [2023-08-29 23:09:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:05,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:09:05,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:05,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143320425] [2023-08-29 23:09:05,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143320425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:05,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660023263] [2023-08-29 23:09:05,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:09:05,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:05,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:05,803 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:05,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-29 23:09:05,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-29 23:09:05,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:09:05,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:09:05,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:09:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660023263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:05,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:05,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-29 23:09:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120351017] [2023-08-29 23:09:05,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:05,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:09:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:09:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:09:05,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:09:05,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1943 transitions, 58552 flow. Second operand has 9 states, 9 states have (on average 111.22222222222223) internal successors, (1001), 9 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:05,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:05,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:09:05,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:13,721 INFO L130 PetriNetUnfolder]: 8412/15027 cut-off events. [2023-08-29 23:09:13,721 INFO L131 PetriNetUnfolder]: For 538350/538350 co-relation queries the response was YES. [2023-08-29 23:09:13,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159040 conditions, 15027 events. 8412/15027 cut-off events. For 538350/538350 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 123297 event pairs, 408 based on Foata normal form. 16/15043 useless extension candidates. Maximal degree in co-relation 158925. Up to 10049 conditions per place. [2023-08-29 23:09:13,885 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1844 selfloop transitions, 210 changer transitions 0/2054 dead transitions. [2023-08-29 23:09:13,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 2054 transitions, 64422 flow [2023-08-29 23:09:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:09:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:09:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1712 transitions. [2023-08-29 23:09:13,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44237726098191216 [2023-08-29 23:09:13,888 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1712 transitions. [2023-08-29 23:09:13,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1712 transitions. [2023-08-29 23:09:13,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:13,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1712 transitions. [2023-08-29 23:09:13,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 114.13333333333334) internal successors, (1712), 15 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:13,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:13,892 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:13,892 INFO L175 Difference]: Start difference. First operand has 315 places, 1943 transitions, 58552 flow. Second operand 15 states and 1712 transitions. [2023-08-29 23:09:13,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 2054 transitions, 64422 flow [2023-08-29 23:09:18,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2054 transitions, 63531 flow, removed 379 selfloop flow, removed 6 redundant places. [2023-08-29 23:09:19,017 INFO L231 Difference]: Finished difference. Result has 325 places, 1951 transitions, 58163 flow [2023-08-29 23:09:19,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=57058, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=58163, PETRI_PLACES=325, PETRI_TRANSITIONS=1951} [2023-08-29 23:09:19,019 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 297 predicate places. [2023-08-29 23:09:19,019 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1951 transitions, 58163 flow [2023-08-29 23:09:19,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.22222222222223) internal successors, (1001), 9 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:19,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:19,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:19,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:19,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-29 23:09:19,219 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:19,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:19,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1566824238, now seen corresponding path program 13 times [2023-08-29 23:09:19,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:19,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062983329] [2023-08-29 23:09:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:19,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:09:19,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:19,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062983329] [2023-08-29 23:09:19,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062983329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:19,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070896799] [2023-08-29 23:09:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:09:19,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:19,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:19,261 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:19,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-29 23:09:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:19,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:09:19,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:09:19,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:09:19,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070896799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:19,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:19,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-29 23:09:19,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61339251] [2023-08-29 23:09:19,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:19,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:09:19,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:19,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:09:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:09:19,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:09:19,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1951 transitions, 58163 flow. Second operand has 10 states, 10 states have (on average 110.9) internal successors, (1109), 10 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:19,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:19,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:09:19,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:28,640 INFO L130 PetriNetUnfolder]: 9409/16995 cut-off events. [2023-08-29 23:09:28,640 INFO L131 PetriNetUnfolder]: For 657744/657744 co-relation queries the response was YES. [2023-08-29 23:09:28,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179231 conditions, 16995 events. 9409/16995 cut-off events. For 657744/657744 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 143226 event pairs, 494 based on Foata normal form. 358/17353 useless extension candidates. Maximal degree in co-relation 179115. Up to 5945 conditions per place. [2023-08-29 23:09:28,929 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1593 selfloop transitions, 688 changer transitions 125/2406 dead transitions. [2023-08-29 23:09:28,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 2406 transitions, 70062 flow [2023-08-29 23:09:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:09:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:09:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1377 transitions. [2023-08-29 23:09:28,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2023-08-29 23:09:28,932 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1377 transitions. [2023-08-29 23:09:28,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1377 transitions. [2023-08-29 23:09:28,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:28,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1377 transitions. [2023-08-29 23:09:28,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 114.75) internal successors, (1377), 12 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:28,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:28,935 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:28,935 INFO L175 Difference]: Start difference. First operand has 325 places, 1951 transitions, 58163 flow. Second operand 12 states and 1377 transitions. [2023-08-29 23:09:28,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 2406 transitions, 70062 flow [2023-08-29 23:09:35,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 2406 transitions, 69518 flow, removed 237 selfloop flow, removed 4 redundant places. [2023-08-29 23:09:35,614 INFO L231 Difference]: Finished difference. Result has 338 places, 1887 transitions, 56371 flow [2023-08-29 23:09:35,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=50725, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=56371, PETRI_PLACES=338, PETRI_TRANSITIONS=1887} [2023-08-29 23:09:35,615 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 310 predicate places. [2023-08-29 23:09:35,616 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1887 transitions, 56371 flow [2023-08-29 23:09:35,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.9) internal successors, (1109), 10 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:35,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:35,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:35,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:35,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-29 23:09:35,820 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:35,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1234529484, now seen corresponding path program 14 times [2023-08-29 23:09:35,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:35,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050857174] [2023-08-29 23:09:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:35,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:09:35,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:35,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050857174] [2023-08-29 23:09:35,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050857174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:35,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598229415] [2023-08-29 23:09:35,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:09:35,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:35,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:35,859 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:35,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-29 23:09:35,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:09:35,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:35,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:09:35,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:35,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:09:36,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598229415] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:36,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:36,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-29 23:09:36,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657118770] [2023-08-29 23:09:36,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:36,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:09:36,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:09:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:09:36,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:09:36,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1887 transitions, 56371 flow. Second operand has 9 states, 9 states have (on average 111.33333333333333) internal successors, (1002), 9 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:36,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:36,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:09:36,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:44,432 INFO L130 PetriNetUnfolder]: 8767/15664 cut-off events. [2023-08-29 23:09:44,432 INFO L131 PetriNetUnfolder]: For 703361/703361 co-relation queries the response was YES. [2023-08-29 23:09:44,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174541 conditions, 15664 events. 8767/15664 cut-off events. For 703361/703361 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 127886 event pairs, 586 based on Foata normal form. 634/16298 useless extension candidates. Maximal degree in co-relation 174420. Up to 8042 conditions per place. [2023-08-29 23:09:44,618 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 1358 selfloop transitions, 840 changer transitions 0/2198 dead transitions. [2023-08-29 23:09:44,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 2198 transitions, 67929 flow [2023-08-29 23:09:44,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:09:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:09:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1275 transitions. [2023-08-29 23:09:44,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492600422832981 [2023-08-29 23:09:44,620 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1275 transitions. [2023-08-29 23:09:44,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1275 transitions. [2023-08-29 23:09:44,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:44,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1275 transitions. [2023-08-29 23:09:44,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 115.9090909090909) internal successors, (1275), 11 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:44,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:44,623 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:44,623 INFO L175 Difference]: Start difference. First operand has 338 places, 1887 transitions, 56371 flow. Second operand 11 states and 1275 transitions. [2023-08-29 23:09:44,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 2198 transitions, 67929 flow [2023-08-29 23:09:52,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 2198 transitions, 65738 flow, removed 952 selfloop flow, removed 6 redundant places. [2023-08-29 23:09:52,217 INFO L231 Difference]: Finished difference. Result has 346 places, 1967 transitions, 59863 flow [2023-08-29 23:09:52,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=53736, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=740, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=59863, PETRI_PLACES=346, PETRI_TRANSITIONS=1967} [2023-08-29 23:09:52,218 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 318 predicate places. [2023-08-29 23:09:52,218 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1967 transitions, 59863 flow [2023-08-29 23:09:52,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.33333333333333) internal successors, (1002), 9 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:52,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:52,219 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:52,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:52,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-29 23:09:52,423 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:52,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1497712035, now seen corresponding path program 15 times [2023-08-29 23:09:52,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:52,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176893533] [2023-08-29 23:09:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:09:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:52,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176893533] [2023-08-29 23:09:52,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176893533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:09:52,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:09:52,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:09:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981027985] [2023-08-29 23:09:52,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:09:52,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:09:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:52,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:09:52,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:09:52,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 258 [2023-08-29 23:09:52,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1967 transitions, 59863 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:52,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:52,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 258 [2023-08-29 23:09:52,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:58,195 INFO L130 PetriNetUnfolder]: 5668/10453 cut-off events. [2023-08-29 23:09:58,195 INFO L131 PetriNetUnfolder]: For 410437/410437 co-relation queries the response was YES. [2023-08-29 23:09:58,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115911 conditions, 10453 events. 5668/10453 cut-off events. For 410437/410437 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 83189 event pairs, 1369 based on Foata normal form. 472/10925 useless extension candidates. Maximal degree in co-relation 115788. Up to 6062 conditions per place. [2023-08-29 23:09:58,311 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 1080 selfloop transitions, 239 changer transitions 305/1624 dead transitions. [2023-08-29 23:09:58,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1624 transitions, 52989 flow [2023-08-29 23:09:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:09:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:09:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-08-29 23:09:58,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46608527131782945 [2023-08-29 23:09:58,313 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-08-29 23:09:58,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-08-29 23:09:58,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:58,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-08-29 23:09:58,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:58,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:58,314 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:58,314 INFO L175 Difference]: Start difference. First operand has 346 places, 1967 transitions, 59863 flow. Second operand 4 states and 481 transitions. [2023-08-29 23:09:58,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1624 transitions, 52989 flow [2023-08-29 23:10:01,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1624 transitions, 51191 flow, removed 792 selfloop flow, removed 13 redundant places. [2023-08-29 23:10:01,909 INFO L231 Difference]: Finished difference. Result has 335 places, 1222 transitions, 35789 flow [2023-08-29 23:10:01,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=42614, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=35789, PETRI_PLACES=335, PETRI_TRANSITIONS=1222} [2023-08-29 23:10:01,911 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 307 predicate places. [2023-08-29 23:10:01,911 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1222 transitions, 35789 flow [2023-08-29 23:10:01,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:01,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:01,911 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:01,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 23:10:01,911 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:01,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash -692783648, now seen corresponding path program 4 times [2023-08-29 23:10:01,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:01,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943854791] [2023-08-29 23:10:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:01,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:10:01,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:01,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943854791] [2023-08-29 23:10:01,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943854791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:01,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493863289] [2023-08-29 23:10:01,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:10:01,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:01,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:01,967 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:02,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-29 23:10:02,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:10:02,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:10:02,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 23:10:02,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:02,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:10:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:10:02,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493863289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:10:02,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:10:02,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2023-08-29 23:10:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69286816] [2023-08-29 23:10:02,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:10:02,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:10:02,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:10:02,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:10:02,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:10:02,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:10:02,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1222 transitions, 35789 flow. Second operand has 12 states, 12 states have (on average 110.66666666666667) internal successors, (1328), 12 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:02,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:02,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:10:02,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:10:07,811 INFO L130 PetriNetUnfolder]: 6863/12520 cut-off events. [2023-08-29 23:10:07,812 INFO L131 PetriNetUnfolder]: For 529957/529957 co-relation queries the response was YES. [2023-08-29 23:10:07,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138985 conditions, 12520 events. 6863/12520 cut-off events. For 529957/529957 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 98738 event pairs, 570 based on Foata normal form. 172/12692 useless extension candidates. Maximal degree in co-relation 138869. Up to 3237 conditions per place. [2023-08-29 23:10:07,996 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 944 selfloop transitions, 1097 changer transitions 0/2041 dead transitions. [2023-08-29 23:10:07,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 2041 transitions, 62561 flow [2023-08-29 23:10:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 23:10:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 23:10:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2645 transitions. [2023-08-29 23:10:07,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2023-08-29 23:10:07,999 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2645 transitions. [2023-08-29 23:10:07,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2645 transitions. [2023-08-29 23:10:08,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:10:08,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2645 transitions. [2023-08-29 23:10:08,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 115.0) internal successors, (2645), 23 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:08,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 258.0) internal successors, (6192), 24 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:08,006 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 258.0) internal successors, (6192), 24 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:08,006 INFO L175 Difference]: Start difference. First operand has 335 places, 1222 transitions, 35789 flow. Second operand 23 states and 2645 transitions. [2023-08-29 23:10:08,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 2041 transitions, 62561 flow [2023-08-29 23:10:12,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 2041 transitions, 61073 flow, removed 413 selfloop flow, removed 6 redundant places. [2023-08-29 23:10:12,549 INFO L231 Difference]: Finished difference. Result has 358 places, 1691 transitions, 54748 flow [2023-08-29 23:10:12,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=35013, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=681, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=54748, PETRI_PLACES=358, PETRI_TRANSITIONS=1691} [2023-08-29 23:10:12,550 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 330 predicate places. [2023-08-29 23:10:12,551 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1691 transitions, 54748 flow [2023-08-29 23:10:12,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.66666666666667) internal successors, (1328), 12 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:12,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:12,551 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:12,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-29 23:10:12,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-29 23:10:12,753 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:12,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:12,753 INFO L85 PathProgramCache]: Analyzing trace with hash 820308504, now seen corresponding path program 5 times [2023-08-29 23:10:12,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:12,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327845257] [2023-08-29 23:10:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:12,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:10:12,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327845257] [2023-08-29 23:10:12,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327845257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533512560] [2023-08-29 23:10:12,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:10:12,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:12,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:12,827 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:12,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-29 23:10:12,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:10:12,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:10:12,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 23:10:12,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:12,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:10:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:10:13,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533512560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:10:13,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:10:13,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2023-08-29 23:10:13,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132915638] [2023-08-29 23:10:13,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:10:13,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:10:13,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:10:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:10:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:10:13,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-08-29 23:10:13,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1691 transitions, 54748 flow. Second operand has 12 states, 12 states have (on average 110.75) internal successors, (1329), 12 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:13,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:13,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-08-29 23:10:13,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:10:19,686 INFO L130 PetriNetUnfolder]: 6644/12170 cut-off events. [2023-08-29 23:10:19,686 INFO L131 PetriNetUnfolder]: For 568291/568291 co-relation queries the response was YES. [2023-08-29 23:10:19,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140412 conditions, 12170 events. 6644/12170 cut-off events. For 568291/568291 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 96531 event pairs, 142 based on Foata normal form. 112/12282 useless extension candidates. Maximal degree in co-relation 140288. Up to 2745 conditions per place. [2023-08-29 23:10:19,833 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1229 selfloop transitions, 907 changer transitions 0/2136 dead transitions. [2023-08-29 23:10:19,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 2136 transitions, 66539 flow [2023-08-29 23:10:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-29 23:10:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-29 23:10:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2854 transitions. [2023-08-29 23:10:19,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44248062015503875 [2023-08-29 23:10:19,850 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2854 transitions. [2023-08-29 23:10:19,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2854 transitions. [2023-08-29 23:10:19,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:10:19,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2854 transitions. [2023-08-29 23:10:19,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 114.16) internal successors, (2854), 25 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:19,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:19,863 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:19,863 INFO L175 Difference]: Start difference. First operand has 358 places, 1691 transitions, 54748 flow. Second operand 25 states and 2854 transitions. [2023-08-29 23:10:19,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 2136 transitions, 66539 flow [2023-08-29 23:10:24,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 2136 transitions, 65334 flow, removed 551 selfloop flow, removed 4 redundant places. [2023-08-29 23:10:24,978 INFO L231 Difference]: Finished difference. Result has 382 places, 1703 transitions, 56528 flow [2023-08-29 23:10:24,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=52716, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=876, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=56528, PETRI_PLACES=382, PETRI_TRANSITIONS=1703} [2023-08-29 23:10:24,980 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 354 predicate places. [2023-08-29 23:10:24,980 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1703 transitions, 56528 flow [2023-08-29 23:10:24,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.75) internal successors, (1329), 12 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:24,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:24,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:24,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-29 23:10:25,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:25,189 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:25,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash 513313272, now seen corresponding path program 16 times [2023-08-29 23:10:25,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:25,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660973267] [2023-08-29 23:10:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:25,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:25,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:25,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660973267] [2023-08-29 23:10:25,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660973267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:25,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550413825] [2023-08-29 23:10:25,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:10:25,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:25,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:25,578 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:25,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-29 23:10:25,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:10:25,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:10:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:10:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:25,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:01,499 WARN L222 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:11:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:01,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550413825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:01,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:11:01,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-29 23:11:01,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449688061] [2023-08-29 23:11:01,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:01,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 23:11:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 23:11:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=338, Unknown=13, NotChecked=0, Total=420 [2023-08-29 23:11:03,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:11:05,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:11:08,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:11:10,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:11:12,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:11:14,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:11:16,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:11:18,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:11:18,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-08-29 23:11:18,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1703 transitions, 56528 flow. Second operand has 21 states, 21 states have (on average 97.57142857142857) internal successors, (2049), 21 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:18,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:18,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-08-29 23:11:18,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:23,233 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1)) (.cse5 (* 4294967296 (div c_~k2~0 4294967296))) (.cse4 (+ c_~k2~0 (* 4294967296 (div c_~k1~0 4294967296))))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k2~0 .cse3 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (< .cse4 (+ .cse5 c_~k1~0 1)) (<= (+ .cse5 c_~k1~0) .cse4))) is different from false [2023-08-29 23:11:26,249 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1))) (and (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k2~0 .cse3 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-29 23:11:32,914 INFO L130 PetriNetUnfolder]: 7360/13545 cut-off events. [2023-08-29 23:11:32,914 INFO L131 PetriNetUnfolder]: For 680892/680892 co-relation queries the response was YES. [2023-08-29 23:11:33,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162970 conditions, 13545 events. 7360/13545 cut-off events. For 680892/680892 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 110175 event pairs, 594 based on Foata normal form. 18/13563 useless extension candidates. Maximal degree in co-relation 162841. Up to 12335 conditions per place. [2023-08-29 23:11:33,186 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 1828 selfloop transitions, 159 changer transitions 26/2013 dead transitions. [2023-08-29 23:11:33,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 2013 transitions, 69646 flow [2023-08-29 23:11:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 23:11:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 23:11:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1745 transitions. [2023-08-29 23:11:33,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39785681714546284 [2023-08-29 23:11:33,188 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1745 transitions. [2023-08-29 23:11:33,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1745 transitions. [2023-08-29 23:11:33,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:33,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1745 transitions. [2023-08-29 23:11:33,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 102.6470588235294) internal successors, (1745), 17 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:33,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 258.0) internal successors, (4644), 18 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:33,193 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 258.0) internal successors, (4644), 18 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:33,193 INFO L175 Difference]: Start difference. First operand has 382 places, 1703 transitions, 56528 flow. Second operand 17 states and 1745 transitions. [2023-08-29 23:11:33,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 2013 transitions, 69646 flow [2023-08-29 23:11:39,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 2013 transitions, 68062 flow, removed 588 selfloop flow, removed 7 redundant places. [2023-08-29 23:11:40,074 INFO L231 Difference]: Finished difference. Result has 400 places, 1840 transitions, 60320 flow [2023-08-29 23:11:40,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=55032, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=60320, PETRI_PLACES=400, PETRI_TRANSITIONS=1840} [2023-08-29 23:11:40,075 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 372 predicate places. [2023-08-29 23:11:40,075 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1840 transitions, 60320 flow [2023-08-29 23:11:40,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.57142857142857) internal successors, (2049), 21 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:40,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:40,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:40,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-29 23:11:40,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:40,281 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:40,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1565600284, now seen corresponding path program 17 times [2023-08-29 23:11:40,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:40,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377176797] [2023-08-29 23:11:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:40,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:40,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377176797] [2023-08-29 23:11:40,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377176797] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:40,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998752076] [2023-08-29 23:11:40,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:11:40,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:40,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:40,533 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:11:40,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-29 23:11:40,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 23:11:40,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:11:40,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 23:11:40,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:41,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:41,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998752076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:41,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:11:41,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-29 23:11:41,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842607192] [2023-08-29 23:11:41,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:41,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:11:41,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:41,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:11:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:11:43,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:11:43,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1840 transitions, 60320 flow. Second operand has 24 states, 24 states have (on average 105.125) internal successors, (2523), 24 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:43,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:43,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:11:43,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:50,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:59,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:12:08,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:12:10,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:12:13,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:12:15,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:12:23,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:12:25,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:12:33,383 INFO L130 PetriNetUnfolder]: 9823/18436 cut-off events. [2023-08-29 23:12:33,383 INFO L131 PetriNetUnfolder]: For 936316/936316 co-relation queries the response was YES. [2023-08-29 23:12:33,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228361 conditions, 18436 events. 9823/18436 cut-off events. For 936316/936316 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 160226 event pairs, 474 based on Foata normal form. 72/18508 useless extension candidates. Maximal degree in co-relation 228224. Up to 6205 conditions per place. [2023-08-29 23:12:33,622 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 676 selfloop transitions, 2046 changer transitions 187/2909 dead transitions. [2023-08-29 23:12:33,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 2909 transitions, 97382 flow [2023-08-29 23:12:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-29 23:12:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-29 23:12:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4279 transitions. [2023-08-29 23:12:33,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252633671238322 [2023-08-29 23:12:33,627 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4279 transitions. [2023-08-29 23:12:33,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4279 transitions. [2023-08-29 23:12:33,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:12:33,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4279 transitions. [2023-08-29 23:12:33,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 109.71794871794872) internal successors, (4279), 39 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:33,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 258.0) internal successors, (10320), 40 states have internal predecessors, (10320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:33,635 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 258.0) internal successors, (10320), 40 states have internal predecessors, (10320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:33,635 INFO L175 Difference]: Start difference. First operand has 400 places, 1840 transitions, 60320 flow. Second operand 39 states and 4279 transitions. [2023-08-29 23:12:33,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 2909 transitions, 97382 flow [2023-08-29 23:12:43,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 2909 transitions, 96400 flow, removed 481 selfloop flow, removed 5 redundant places. [2023-08-29 23:12:43,489 INFO L231 Difference]: Finished difference. Result has 446 places, 2479 transitions, 88346 flow [2023-08-29 23:12:43,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=59537, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=88346, PETRI_PLACES=446, PETRI_TRANSITIONS=2479} [2023-08-29 23:12:43,490 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 418 predicate places. [2023-08-29 23:12:43,490 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 2479 transitions, 88346 flow [2023-08-29 23:12:43,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 105.125) internal successors, (2523), 24 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:43,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:12:43,491 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:12:43,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-29 23:12:43,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:12:43,696 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:12:43,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:12:43,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1641298301, now seen corresponding path program 18 times [2023-08-29 23:12:43,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:12:43,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315362473] [2023-08-29 23:12:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:12:43,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:12:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:12:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:43,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:12:43,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315362473] [2023-08-29 23:12:43,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315362473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:12:43,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640853293] [2023-08-29 23:12:43,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:12:43,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:12:43,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:12:43,980 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:12:43,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-29 23:12:44,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-29 23:12:44,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:12:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-29 23:12:44,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:12:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:44,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:12:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:12:45,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640853293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:12:45,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:12:45,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 21 [2023-08-29 23:12:45,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975406976] [2023-08-29 23:12:45,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:12:45,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 23:12:45,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:12:45,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 23:12:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-08-29 23:12:46,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:12:46,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 2479 transitions, 88346 flow. Second operand has 23 states, 23 states have (on average 105.21739130434783) internal successors, (2420), 23 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:46,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:12:46,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:12:46,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:13:04,097 INFO L130 PetriNetUnfolder]: 9711/18141 cut-off events. [2023-08-29 23:13:04,097 INFO L131 PetriNetUnfolder]: For 975123/975123 co-relation queries the response was YES. [2023-08-29 23:13:04,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237171 conditions, 18141 events. 9711/18141 cut-off events. For 975123/975123 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 156069 event pairs, 866 based on Foata normal form. 6/18147 useless extension candidates. Maximal degree in co-relation 237021. Up to 17529 conditions per place. [2023-08-29 23:13:04,376 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 2447 selfloop transitions, 133 changer transitions 44/2624 dead transitions. [2023-08-29 23:13:04,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2624 transitions, 95735 flow [2023-08-29 23:13:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 23:13:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 23:13:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2411 transitions. [2023-08-29 23:13:04,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247709654686399 [2023-08-29 23:13:04,379 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2411 transitions. [2023-08-29 23:13:04,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2411 transitions. [2023-08-29 23:13:04,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:13:04,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2411 transitions. [2023-08-29 23:13:04,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 109.5909090909091) internal successors, (2411), 22 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:04,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:04,384 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:04,384 INFO L175 Difference]: Start difference. First operand has 446 places, 2479 transitions, 88346 flow. Second operand 22 states and 2411 transitions. [2023-08-29 23:13:04,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2624 transitions, 95735 flow [2023-08-29 23:13:16,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 2624 transitions, 90787 flow, removed 2012 selfloop flow, removed 9 redundant places. [2023-08-29 23:13:16,460 INFO L231 Difference]: Finished difference. Result has 466 places, 2522 transitions, 85264 flow [2023-08-29 23:13:16,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=83448, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=85264, PETRI_PLACES=466, PETRI_TRANSITIONS=2522} [2023-08-29 23:13:16,462 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 438 predicate places. [2023-08-29 23:13:16,462 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 2522 transitions, 85264 flow [2023-08-29 23:13:16,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 105.21739130434783) internal successors, (2420), 23 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:16,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:13:16,462 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:13:16,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-29 23:13:16,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:13:16,667 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:13:16,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:13:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1743013771, now seen corresponding path program 19 times [2023-08-29 23:13:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:13:16,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942337335] [2023-08-29 23:13:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:13:16,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:13:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:13:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:13:17,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:13:17,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942337335] [2023-08-29 23:13:17,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942337335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:13:17,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574735229] [2023-08-29 23:13:17,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:13:17,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:13:17,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:13:17,143 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:13:17,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-29 23:13:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:13:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-29 23:13:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:13:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:13:17,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:13:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:13:20,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574735229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:13:20,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:13:20,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 23 [2023-08-29 23:13:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208282550] [2023-08-29 23:13:20,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:13:20,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:13:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:13:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:13:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:13:21,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:13:21,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 2522 transitions, 85264 flow. Second operand has 25 states, 25 states have (on average 105.04) internal successors, (2626), 25 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:21,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:13:21,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:13:21,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:13:26,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:13:29,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:13:46,980 INFO L130 PetriNetUnfolder]: 10426/19288 cut-off events. [2023-08-29 23:13:46,981 INFO L131 PetriNetUnfolder]: For 972256/972256 co-relation queries the response was YES. [2023-08-29 23:13:47,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246032 conditions, 19288 events. 10426/19288 cut-off events. For 972256/972256 co-relation queries the response was YES. Maximal size of possible extension queue 1091. Compared 165871 event pairs, 618 based on Foata normal form. 7/19295 useless extension candidates. Maximal degree in co-relation 245874. Up to 12278 conditions per place. [2023-08-29 23:13:47,439 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1269 selfloop transitions, 1614 changer transitions 52/2935 dead transitions. [2023-08-29 23:13:47,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2935 transitions, 102464 flow [2023-08-29 23:13:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-29 23:13:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-29 23:13:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3822 transitions. [2023-08-29 23:13:47,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2023-08-29 23:13:47,458 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3822 transitions. [2023-08-29 23:13:47,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3822 transitions. [2023-08-29 23:13:47,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:13:47,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3822 transitions. [2023-08-29 23:13:47,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 109.2) internal successors, (3822), 35 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:47,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 258.0) internal successors, (9288), 36 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:47,481 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 258.0) internal successors, (9288), 36 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:47,481 INFO L175 Difference]: Start difference. First operand has 466 places, 2522 transitions, 85264 flow. Second operand 35 states and 3822 transitions. [2023-08-29 23:13:47,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2935 transitions, 102464 flow [2023-08-29 23:14:00,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 2935 transitions, 100669 flow, removed 157 selfloop flow, removed 12 redundant places. [2023-08-29 23:14:00,137 INFO L231 Difference]: Finished difference. Result has 496 places, 2756 transitions, 98758 flow [2023-08-29 23:14:00,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=83627, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=98758, PETRI_PLACES=496, PETRI_TRANSITIONS=2756} [2023-08-29 23:14:00,140 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 468 predicate places. [2023-08-29 23:14:00,140 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 2756 transitions, 98758 flow [2023-08-29 23:14:00,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 105.04) internal successors, (2626), 25 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:00,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:14:00,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:14:00,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-29 23:14:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:14:00,362 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:14:00,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:14:00,362 INFO L85 PathProgramCache]: Analyzing trace with hash -982478424, now seen corresponding path program 20 times [2023-08-29 23:14:00,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:14:00,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77090298] [2023-08-29 23:14:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:14:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:14:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:14:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:14:00,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:14:00,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77090298] [2023-08-29 23:14:00,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77090298] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:14:00,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323263274] [2023-08-29 23:14:00,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:14:00,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:14:00,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:14:00,615 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:14:00,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-29 23:14:00,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:14:00,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:14:00,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:14:00,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:14:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:14:01,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:14:03,408 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))))) is different from false [2023-08-29 23:14:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-08-29 23:14:03,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323263274] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:14:03,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:14:03,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-29 23:14:03,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238803230] [2023-08-29 23:14:03,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:14:03,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 23:14:03,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:14:03,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 23:14:03,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2023-08-29 23:14:03,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-08-29 23:14:03,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 2756 transitions, 98758 flow. Second operand has 21 states, 21 states have (on average 97.38095238095238) internal successors, (2045), 21 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:03,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:14:03,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-08-29 23:14:03,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:14:06,068 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse3 (+ c_~j1~0 1))) (and (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) (< c_~j1~0 c_~m~0)) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse3 ~m~0) (let ((.cse4 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse4) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse4 .cse5))))) (forall ((~m~0 Int)) (or (let ((.cse6 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse6 .cse5) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse3 ~m~0))) (< 0 c_~m~0) (<= c_~m~0 1) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-29 23:14:10,246 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-29 23:14:18,347 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-29 23:14:28,630 INFO L130 PetriNetUnfolder]: 10795/20021 cut-off events. [2023-08-29 23:14:28,630 INFO L131 PetriNetUnfolder]: For 1078912/1078912 co-relation queries the response was YES. [2023-08-29 23:14:29,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263764 conditions, 20021 events. 10795/20021 cut-off events. For 1078912/1078912 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 173776 event pairs, 949 based on Foata normal form. 9/20030 useless extension candidates. Maximal degree in co-relation 263601. Up to 19258 conditions per place. [2023-08-29 23:14:29,181 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 2834 selfloop transitions, 121 changer transitions 11/2966 dead transitions. [2023-08-29 23:14:29,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 2966 transitions, 111556 flow [2023-08-29 23:14:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:14:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:14:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1831 transitions. [2023-08-29 23:14:29,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39427217915590007 [2023-08-29 23:14:29,183 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1831 transitions. [2023-08-29 23:14:29,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1831 transitions. [2023-08-29 23:14:29,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:14:29,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1831 transitions. [2023-08-29 23:14:29,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 101.72222222222223) internal successors, (1831), 18 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:29,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:29,187 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:29,187 INFO L175 Difference]: Start difference. First operand has 496 places, 2756 transitions, 98758 flow. Second operand 18 states and 1831 transitions. [2023-08-29 23:14:29,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 2966 transitions, 111556 flow [2023-08-29 23:14:42,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 2966 transitions, 110181 flow, removed 669 selfloop flow, removed 10 redundant places. [2023-08-29 23:14:42,172 INFO L231 Difference]: Finished difference. Result has 512 places, 2844 transitions, 101384 flow [2023-08-29 23:14:42,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=97407, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=101384, PETRI_PLACES=512, PETRI_TRANSITIONS=2844} [2023-08-29 23:14:42,175 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 484 predicate places. [2023-08-29 23:14:42,175 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 2844 transitions, 101384 flow [2023-08-29 23:14:42,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.38095238095238) internal successors, (2045), 21 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:42,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:14:42,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:14:42,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-29 23:14:42,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-29 23:14:42,380 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:14:42,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:14:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1651926386, now seen corresponding path program 21 times [2023-08-29 23:14:42,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:14:42,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134945567] [2023-08-29 23:14:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:14:42,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:14:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:14:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:14:42,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:14:42,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134945567] [2023-08-29 23:14:42,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134945567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:14:42,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728804197] [2023-08-29 23:14:42,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:14:42,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:14:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:14:42,617 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:14:42,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-29 23:14:42,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-29 23:14:42,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:14:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:14:42,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:14:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:14:43,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:14:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:14:43,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728804197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:14:43,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:14:43,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-08-29 23:14:43,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044682395] [2023-08-29 23:14:43,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:14:43,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 23:14:43,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:14:43,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 23:14:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-08-29 23:14:45,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:14:46,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:14:46,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 2844 transitions, 101384 flow. Second operand has 23 states, 23 states have (on average 105.26086956521739) internal successors, (2421), 23 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:46,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:14:46,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:14:46,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:14:56,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:14:58,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:01,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:02,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:05,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:15,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:18,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:23,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:27,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:30,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:33,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:36,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:40,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:46,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:48,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:15:57,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:16:05,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:16:15,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:16:17,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:16:22,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:16:30,142 INFO L130 PetriNetUnfolder]: 14298/26398 cut-off events. [2023-08-29 23:16:30,143 INFO L131 PetriNetUnfolder]: For 1571556/1571556 co-relation queries the response was YES. [2023-08-29 23:16:30,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372597 conditions, 26398 events. 14298/26398 cut-off events. For 1571556/1571556 co-relation queries the response was YES. Maximal size of possible extension queue 1483. Compared 237817 event pairs, 1040 based on Foata normal form. 38/26436 useless extension candidates. Maximal degree in co-relation 372425. Up to 19979 conditions per place. [2023-08-29 23:16:30,635 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 3305 selfloop transitions, 838 changer transitions 53/4196 dead transitions. [2023-08-29 23:16:30,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 4196 transitions, 159565 flow [2023-08-29 23:16:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-29 23:16:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-29 23:16:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3948 transitions. [2023-08-29 23:16:30,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42506459948320413 [2023-08-29 23:16:30,642 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3948 transitions. [2023-08-29 23:16:30,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3948 transitions. [2023-08-29 23:16:30,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:16:30,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3948 transitions. [2023-08-29 23:16:30,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 109.66666666666667) internal successors, (3948), 36 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:30,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 258.0) internal successors, (9546), 37 states have internal predecessors, (9546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:30,654 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 258.0) internal successors, (9546), 37 states have internal predecessors, (9546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:30,654 INFO L175 Difference]: Start difference. First operand has 512 places, 2844 transitions, 101384 flow. Second operand 36 states and 3948 transitions. [2023-08-29 23:16:30,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 4196 transitions, 159565 flow [2023-08-29 23:16:52,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 4196 transitions, 158027 flow, removed 758 selfloop flow, removed 6 redundant places. [2023-08-29 23:16:52,426 INFO L231 Difference]: Finished difference. Result has 560 places, 3541 transitions, 133990 flow [2023-08-29 23:16:52,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=100502, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=133990, PETRI_PLACES=560, PETRI_TRANSITIONS=3541} [2023-08-29 23:16:52,429 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 532 predicate places. [2023-08-29 23:16:52,429 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 3541 transitions, 133990 flow [2023-08-29 23:16:52,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 105.26086956521739) internal successors, (2421), 23 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:52,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:16:52,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:16:52,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-29 23:16:52,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-29 23:16:52,634 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:16:52,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:16:52,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1247984198, now seen corresponding path program 22 times [2023-08-29 23:16:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:16:52,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605916244] [2023-08-29 23:16:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:16:52,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:16:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:16:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:16:52,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:16:52,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605916244] [2023-08-29 23:16:52,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605916244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:16:52,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677364645] [2023-08-29 23:16:52,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:16:52,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:16:52,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:16:52,910 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:16:52,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-29 23:16:53,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:16:53,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:16:53,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:16:53,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:16:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:16:53,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:16:55,631 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))))) is different from false [2023-08-29 23:16:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-08-29 23:16:55,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677364645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:16:55,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:16:55,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-29 23:16:55,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624918288] [2023-08-29 23:16:55,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:16:55,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 23:16:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:16:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 23:16:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=320, Unknown=1, NotChecked=36, Total=420 [2023-08-29 23:16:55,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-08-29 23:16:55,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 3541 transitions, 133990 flow. Second operand has 21 states, 21 states have (on average 97.42857142857143) internal successors, (2046), 21 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:55,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:16:55,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-08-29 23:16:55,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:16:58,876 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (* 4294967296 (div c_~k2~0 4294967296)))) (let ((.cse3 (* (div (+ c_~k1~0 1) 4294967296) 4294967296)) (.cse4 (< c_~j1~0 c_~m~0)) (.cse7 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse5 (+ c_~j1~0 1)) (.cse10 (+ .cse9 c_~k1~0)) (.cse12 (* 4294967296 (div c_~k1~0 4294967296)))) (and (<= (+ c_~k2~0 (* c_~j1~0 2)) (+ c_~m~0 (* 4294967296 (div (+ (- 2) c_~k2~0 c_~m~0) 4294967296)) (* (div (+ (- c_~k1~0) 1) 4294967296) 4294967296) c_~k1~0 1)) (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 .cse3)) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) .cse4) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse5 ~m~0) (let ((.cse6 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse6 .cse7))))) (or (let ((.cse8 (+ c_~k2~0 .cse3))) (and (<= .cse8 (+ .cse9 c_~k1~0 1)) (< .cse10 .cse8))) .cse4) (forall ((~m~0 Int)) (or (let ((.cse11 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse11 .cse7) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse11) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse5 ~m~0))) (<= (+ c_~k2~0 .cse12) .cse10) (< .cse10 (+ c_~k2~0 .cse12 1))))) is different from false [2023-08-29 23:17:04,380 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-29 23:17:16,536 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-29 23:17:36,188 INFO L130 PetriNetUnfolder]: 14811/27390 cut-off events. [2023-08-29 23:17:36,188 INFO L131 PetriNetUnfolder]: For 1720372/1720372 co-relation queries the response was YES. [2023-08-29 23:17:36,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395704 conditions, 27390 events. 14811/27390 cut-off events. For 1720372/1720372 co-relation queries the response was YES. Maximal size of possible extension queue 1538. Compared 248515 event pairs, 1238 based on Foata normal form. 9/27399 useless extension candidates. Maximal degree in co-relation 395512. Up to 26440 conditions per place. [2023-08-29 23:17:36,728 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 3644 selfloop transitions, 166 changer transitions 25/3835 dead transitions. [2023-08-29 23:17:36,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 3835 transitions, 151191 flow [2023-08-29 23:17:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 23:17:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 23:17:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2338 transitions. [2023-08-29 23:17:36,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39400067408156386 [2023-08-29 23:17:36,732 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2338 transitions. [2023-08-29 23:17:36,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2338 transitions. [2023-08-29 23:17:36,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:17:36,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2338 transitions. [2023-08-29 23:17:36,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 101.65217391304348) internal successors, (2338), 23 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:36,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 258.0) internal successors, (6192), 24 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:36,736 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 258.0) internal successors, (6192), 24 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:36,737 INFO L175 Difference]: Start difference. First operand has 560 places, 3541 transitions, 133990 flow. Second operand 23 states and 2338 transitions. [2023-08-29 23:17:36,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 3835 transitions, 151191 flow [2023-08-29 23:18:03,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 3835 transitions, 147440 flow, removed 1858 selfloop flow, removed 9 redundant places. [2023-08-29 23:18:03,154 INFO L231 Difference]: Finished difference. Result has 587 places, 3668 transitions, 136238 flow [2023-08-29 23:18:03,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=130295, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=136238, PETRI_PLACES=587, PETRI_TRANSITIONS=3668} [2023-08-29 23:18:03,156 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 559 predicate places. [2023-08-29 23:18:03,156 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 3668 transitions, 136238 flow [2023-08-29 23:18:03,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.42857142857143) internal successors, (2046), 21 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:18:03,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:18:03,157 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:18:03,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-29 23:18:03,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-29 23:18:03,361 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:18:03,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:18:03,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1145677113, now seen corresponding path program 23 times [2023-08-29 23:18:03,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:18:03,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995595123] [2023-08-29 23:18:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:18:03,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:18:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:18:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:18:03,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:18:03,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995595123] [2023-08-29 23:18:03,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995595123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:18:03,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417582554] [2023-08-29 23:18:03,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:18:03,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:18:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:18:03,710 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:18:03,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-29 23:18:04,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 23:18:04,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:18:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-29 23:18:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:18:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:18:04,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:18:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:18:05,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417582554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:18:05,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:18:05,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 24 [2023-08-29 23:18:05,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79287245] [2023-08-29 23:18:05,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:18:05,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-29 23:18:05,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:18:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-29 23:18:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-08-29 23:18:06,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:18:06,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 3668 transitions, 136238 flow. Second operand has 26 states, 26 states have (on average 105.0) internal successors, (2730), 26 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:18:06,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:18:06,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:18:06,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:18:09,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:59,340 INFO L130 PetriNetUnfolder]: 16025/29440 cut-off events. [2023-08-29 23:18:59,341 INFO L131 PetriNetUnfolder]: For 1929325/1929325 co-relation queries the response was YES. [2023-08-29 23:19:00,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436557 conditions, 29440 events. 16025/29440 cut-off events. For 1929325/1929325 co-relation queries the response was YES. Maximal size of possible extension queue 1640. Compared 267893 event pairs, 917 based on Foata normal form. 9/29449 useless extension candidates. Maximal degree in co-relation 436350. Up to 18151 conditions per place. [2023-08-29 23:19:01,040 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1751 selfloop transitions, 2390 changer transitions 63/4204 dead transitions. [2023-08-29 23:19:01,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 4204 transitions, 162341 flow [2023-08-29 23:19:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-29 23:19:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-29 23:19:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4461 transitions. [2023-08-29 23:19:01,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421724333522405 [2023-08-29 23:19:01,045 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4461 transitions. [2023-08-29 23:19:01,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4461 transitions. [2023-08-29 23:19:01,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:19:01,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4461 transitions. [2023-08-29 23:19:01,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 108.8048780487805) internal successors, (4461), 41 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:01,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 258.0) internal successors, (10836), 42 states have internal predecessors, (10836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:01,068 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 258.0) internal successors, (10836), 42 states have internal predecessors, (10836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:01,068 INFO L175 Difference]: Start difference. First operand has 587 places, 3668 transitions, 136238 flow. Second operand 41 states and 4461 transitions. [2023-08-29 23:19:01,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 4204 transitions, 162341 flow [2023-08-29 23:19:33,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 4204 transitions, 161364 flow, removed 473 selfloop flow, removed 7 redundant places. [2023-08-29 23:19:33,467 INFO L231 Difference]: Finished difference. Result has 631 places, 4008 transitions, 159006 flow [2023-08-29 23:19:33,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=135261, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2070, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=159006, PETRI_PLACES=631, PETRI_TRANSITIONS=4008} [2023-08-29 23:19:33,470 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 603 predicate places. [2023-08-29 23:19:33,470 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 4008 transitions, 159006 flow [2023-08-29 23:19:33,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.0) internal successors, (2730), 26 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:33,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:19:33,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:19:33,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-29 23:19:33,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:19:33,676 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:19:33,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:19:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash -770870210, now seen corresponding path program 24 times [2023-08-29 23:19:33,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:19:33,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029227063] [2023-08-29 23:19:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:19:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:19:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:19:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:19:33,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:19:33,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029227063] [2023-08-29 23:19:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029227063] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:19:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392613618] [2023-08-29 23:19:33,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:19:33,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:19:33,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:19:33,881 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:19:33,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-29 23:19:34,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-29 23:19:34,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:19:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:19:34,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:19:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:19:34,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:19:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:19:34,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392613618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:19:34,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:19:34,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-29 23:19:34,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447515620] [2023-08-29 23:19:34,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:19:34,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 23:19:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:19:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 23:19:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-29 23:19:35,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-08-29 23:19:35,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 4008 transitions, 159006 flow. Second operand has 22 states, 22 states have (on average 105.45454545454545) internal successors, (2320), 22 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:35,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:19:35,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-08-29 23:19:35,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:19:43,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:19:53,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:20:42,397 INFO L130 PetriNetUnfolder]: 17413/32139 cut-off events. [2023-08-29 23:20:42,397 INFO L131 PetriNetUnfolder]: For 2336435/2336435 co-relation queries the response was YES. [2023-08-29 23:20:43,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495268 conditions, 32139 events. 17413/32139 cut-off events. For 2336435/2336435 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 295741 event pairs, 1064 based on Foata normal form. 22/32161 useless extension candidates. Maximal degree in co-relation 495050. Up to 20962 conditions per place. [2023-08-29 23:20:43,218 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 2165 selfloop transitions, 2456 changer transitions 45/4666 dead transitions. [2023-08-29 23:20:43,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 4666 transitions, 192055 flow [2023-08-29 23:20:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-29 23:20:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-29 23:20:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3507 transitions. [2023-08-29 23:20:43,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42478197674418605 [2023-08-29 23:20:43,221 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3507 transitions. [2023-08-29 23:20:43,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3507 transitions. [2023-08-29 23:20:43,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:20:43,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3507 transitions. [2023-08-29 23:20:43,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 109.59375) internal successors, (3507), 32 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:43,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 258.0) internal successors, (8514), 33 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:43,227 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 258.0) internal successors, (8514), 33 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:43,227 INFO L175 Difference]: Start difference. First operand has 631 places, 4008 transitions, 159006 flow. Second operand 32 states and 3507 transitions. [2023-08-29 23:20:43,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 4666 transitions, 192055 flow Killed by 15