./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/popl20-nonblocking-cntr.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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:10:56,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:10:56,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:10:56,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:10:56,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:10:56,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:10:56,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:10:56,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:10:56,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:10:56,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:10:56,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:10:56,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:10:56,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:10:56,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:10:56,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:10:56,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:10:56,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:10:56,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:10:56,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:10:56,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:10:56,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:10:56,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:10:56,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:10:56,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:10:56,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:10:56,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:10:56,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:10:56,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:10:56,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:10:56,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:10:56,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:10:56,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:10:56,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:10:56,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:10:56,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:10:56,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:10:56,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:10:56,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:10:56,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:10:56,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:10:56,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:10:56,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:10:56,964 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:10:56,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:10:56,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:10:56,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:10:56,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:10:56,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:10:56,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:10:56,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:10:56,967 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:10:56,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:10:56,968 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:10:56,968 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:10:56,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:10:56,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:10:56,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:10:56,969 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:10:56,969 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:10:56,969 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:10:56,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:10:56,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:10:56,970 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:10:56,970 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:10:56,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:10:56,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:10:56,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:10:56,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:10:56,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:10:56,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:10:56,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:10:56,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:10:56,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:10:56,972 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:10:56,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:10:56,972 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:10:56,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:10:57,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:10:57,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:10:57,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:10:57,318 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:10:57,318 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:10:57,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-30 07:10:58,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:10:58,731 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:10:58,732 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-30 07:10:58,738 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ae5ef36/6e92aba9feae415d965c007e86b550fd/FLAG7ba6d27c4 [2023-08-30 07:10:58,752 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ae5ef36/6e92aba9feae415d965c007e86b550fd [2023-08-30 07:10:58,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:10:58,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:10:58,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:10:58,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:10:58,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:10:58,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:10:58" (1/1) ... [2023-08-30 07:10:58,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263e6afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:58, skipping insertion in model container [2023-08-30 07:10:58,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:10:58" (1/1) ... [2023-08-30 07:10:58,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:10:58,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:10:58,969 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/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-08-30 07:10:58,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:10:58,982 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:10:59,005 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/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-08-30 07:10:59,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:10:59,017 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:10:59,018 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:10:59,023 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:10:59,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59 WrapperNode [2023-08-30 07:10:59,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:10:59,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:10:59,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:10:59,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:10:59,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,063 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-08-30 07:10:59,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:10:59,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:10:59,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:10:59,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:10:59,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,098 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:10:59,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:10:59,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:10:59,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:10:59,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (1/1) ... [2023-08-30 07:10:59,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:10:59,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:59,138 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) [2023-08-30 07:10:59,160 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 [2023-08-30 07:10:59,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:10:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:10:59,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:10:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:10:59,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:10:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 07:10:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:10:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 07:10:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:10:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:10:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:10:59,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:10:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 07:10:59,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:10:59,182 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:10:59,283 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:10:59,285 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:10:59,517 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:10:59,571 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:10:59,575 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 07:10:59,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:10:59 BoogieIcfgContainer [2023-08-30 07:10:59,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:10:59,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:10:59,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:10:59,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:10:59,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:10:58" (1/3) ... [2023-08-30 07:10:59,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27675e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:10:59, skipping insertion in model container [2023-08-30 07:10:59,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:59" (2/3) ... [2023-08-30 07:10:59,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27675e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:10:59, skipping insertion in model container [2023-08-30 07:10:59,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:10:59" (3/3) ... [2023-08-30 07:10:59,586 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-08-30 07:10:59,601 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:10:59,601 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 07:10:59,601 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:10:59,690 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:10:59,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2023-08-30 07:10:59,805 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2023-08-30 07:10:59,806 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:10:59,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 07:10:59,813 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2023-08-30 07:10:59,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 82 transitions, 176 flow [2023-08-30 07:10:59,822 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:10:59,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 82 transitions, 176 flow [2023-08-30 07:10:59,839 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 82 transitions, 176 flow [2023-08-30 07:10:59,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 176 flow [2023-08-30 07:10:59,871 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2023-08-30 07:10:59,871 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:10:59,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 07:10:59,873 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-30 07:11:02,504 INFO L134 LiptonReduction]: Checked pairs total: 665 [2023-08-30 07:11:02,504 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-30 07:11:02,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:11:02,521 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;@62f2588c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:11:02,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 07:11:02,523 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 07:11:02,523 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:11:02,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:02,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 07:11:02,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:02,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash 356, now seen corresponding path program 1 times [2023-08-30 07:11:02,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:02,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835697160] [2023-08-30 07:11:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:02,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:02,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:02,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835697160] [2023-08-30 07:11:02,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835697160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:11:02,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:11:02,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 07:11:02,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699751370] [2023-08-30 07:11:02,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:11:02,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 07:11:02,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 07:11:02,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 07:11:02,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-08-30 07:11:02,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:02,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:02,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-08-30 07:11:02,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:02,731 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-08-30 07:11:02,732 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 07:11:02,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 506 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-30 07:11:02,736 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-30 07:11:02,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-30 07:11:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 07:11:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 07:11:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 176 transitions. [2023-08-30 07:11:02,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146198830409356 [2023-08-30 07:11:02,751 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 176 transitions. [2023-08-30 07:11:02,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 176 transitions. [2023-08-30 07:11:02,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:02,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 176 transitions. [2023-08-30 07:11:02,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 88.0) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:02,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:02,767 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:02,768 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 176 transitions. [2023-08-30 07:11:02,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-30 07:11:02,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:11:02,772 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-30 07:11:02,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, 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=23, PETRI_TRANSITIONS=21} [2023-08-30 07:11:02,779 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 07:11:02,779 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-30 07:11:02,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:02,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:02,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:11:02,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 07:11:02,782 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)] === [2023-08-30 07:11:02,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:02,791 INFO L85 PathProgramCache]: Analyzing trace with hash 351786, now seen corresponding path program 1 times [2023-08-30 07:11:02,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:02,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902241844] [2023-08-30 07:11:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:02,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:02,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:02,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902241844] [2023-08-30 07:11:02,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902241844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:11:02,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:11:02,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:11:02,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098238056] [2023-08-30 07:11:02,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:11:02,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:11:02,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:02,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:11:02,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:11:03,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-08-30 07:11:03,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:03,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-08-30 07:11:03,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:03,044 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-08-30 07:11:03,044 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:11:03,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 461 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-30 07:11:03,046 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 07:11:03,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-30 07:11:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:11:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:11:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-08-30 07:11:03,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4580896686159844 [2023-08-30 07:11:03,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-08-30 07:11:03,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-08-30 07:11:03,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:03,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-08-30 07:11:03,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,052 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 235 transitions. [2023-08-30 07:11:03,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-30 07:11:03,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 07:11:03,053 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-30 07:11:03,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, 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=23, PETRI_TRANSITIONS=19} [2023-08-30 07:11:03,054 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 07:11:03,055 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-30 07:11:03,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:03,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:11:03,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 07:11:03,056 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)] === [2023-08-30 07:11:03,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash 351787, now seen corresponding path program 1 times [2023-08-30 07:11:03,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:03,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207989269] [2023-08-30 07:11:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:03,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:03,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207989269] [2023-08-30 07:11:03,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207989269] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:11:03,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:11:03,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:11:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486292221] [2023-08-30 07:11:03,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:11:03,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:11:03,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:03,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:11:03,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:11:03,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 171 [2023-08-30 07:11:03,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:03,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 171 [2023-08-30 07:11:03,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:03,217 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-08-30 07:11:03,217 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:11:03,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 406 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-30 07:11:03,219 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-30 07:11:03,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-30 07:11:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:11:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:11:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-30 07:11:03,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43079922027290446 [2023-08-30 07:11:03,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-30 07:11:03,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-30 07:11:03,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:03,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-30 07:11:03,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,224 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 221 transitions. [2023-08-30 07:11:03,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-30 07:11:03,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:11:03,225 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-30 07:11:03,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=22, PETRI_TRANSITIONS=17} [2023-08-30 07:11:03,226 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 07:11:03,226 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-30 07:11:03,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:03,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:11:03,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 07:11:03,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:03,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:03,228 INFO L85 PathProgramCache]: Analyzing trace with hash 338076062, now seen corresponding path program 1 times [2023-08-30 07:11:03,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:03,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351446776] [2023-08-30 07:11:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:03,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:03,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351446776] [2023-08-30 07:11:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351446776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:11:03,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:11:03,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:11:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507460342] [2023-08-30 07:11:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:11:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:11:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:03,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:11:03,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:11:03,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-30 07:11:03,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:03,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-30 07:11:03,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:03,376 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-08-30 07:11:03,377 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:11:03,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 282 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-30 07:11:03,378 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-30 07:11:03,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-30 07:11:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:11:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:11:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-08-30 07:11:03,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2023-08-30 07:11:03,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-08-30 07:11:03,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-08-30 07:11:03,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:03,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-08-30 07:11:03,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,383 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 207 transitions. [2023-08-30 07:11:03,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-30 07:11:03,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:11:03,384 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-30 07:11:03,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=22, PETRI_TRANSITIONS=16} [2023-08-30 07:11:03,385 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 07:11:03,385 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-30 07:11:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:03,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:11:03,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 07:11:03,386 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:03,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash 338076064, now seen corresponding path program 1 times [2023-08-30 07:11:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484208760] [2023-08-30 07:11:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:03,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:03,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484208760] [2023-08-30 07:11:03,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484208760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:11:03,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:11:03,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:11:03,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076829688] [2023-08-30 07:11:03,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:11:03,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:11:03,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:03,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:11:03,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:11:03,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-08-30 07:11:03,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:03,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-08-30 07:11:03,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:03,538 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-08-30 07:11:03,539 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:11:03,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 169 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-30 07:11:03,540 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-30 07:11:03,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-30 07:11:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:11:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:11:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-08-30 07:11:03,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834307992202727 [2023-08-30 07:11:03,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-08-30 07:11:03,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-08-30 07:11:03,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:03,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-08-30 07:11:03,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,545 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 230 transitions. [2023-08-30 07:11:03,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-30 07:11:03,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:11:03,545 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-30 07:11:03,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=37, 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=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-30 07:11:03,546 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 07:11:03,547 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-30 07:11:03,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:03,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:03,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 07:11:03,548 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)] === [2023-08-30 07:11:03,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:03,548 INFO L85 PathProgramCache]: Analyzing trace with hash -423603408, now seen corresponding path program 1 times [2023-08-30 07:11:03,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:03,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510875996] [2023-08-30 07:11:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:03,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:03,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:03,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510875996] [2023-08-30 07:11:03,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510875996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:11:03,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:11:03,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:11:03,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132477278] [2023-08-30 07:11:03,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:11:03,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:11:03,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:03,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:11:03,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:11:03,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-08-30 07:11:03,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:03,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-08-30 07:11:03,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:03,709 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2023-08-30 07:11:03,709 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:11:03,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 95 events. 54/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 243 event pairs, 10 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 197. Up to 73 conditions per place. [2023-08-30 07:11:03,710 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-30 07:11:03,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-08-30 07:11:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:11:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:11:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 309 transitions. [2023-08-30 07:11:03,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517543859649123 [2023-08-30 07:11:03,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 309 transitions. [2023-08-30 07:11:03,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 309 transitions. [2023-08-30 07:11:03,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:03,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 309 transitions. [2023-08-30 07:11:03,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,716 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 309 transitions. [2023-08-30 07:11:03,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-08-30 07:11:03,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:11:03,717 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-08-30 07:11:03,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-30 07:11:03,718 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-08-30 07:11:03,718 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-08-30 07:11:03,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:03,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:03,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 07:11:03,719 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)] === [2023-08-30 07:11:03,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1614582855, now seen corresponding path program 1 times [2023-08-30 07:11:03,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:03,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955225931] [2023-08-30 07:11:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:03,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:03,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:03,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955225931] [2023-08-30 07:11:03,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955225931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:11:03,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:11:03,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:11:03,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46384659] [2023-08-30 07:11:03,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:11:03,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:11:03,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:03,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:11:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:11:03,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 171 [2023-08-30 07:11:03,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:03,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 171 [2023-08-30 07:11:03,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:03,898 INFO L130 PetriNetUnfolder]: 55/100 cut-off events. [2023-08-30 07:11:03,898 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-30 07:11:03,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 100 events. 55/100 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 24 based on Foata normal form. 2/82 useless extension candidates. Maximal degree in co-relation 254. Up to 76 conditions per place. [2023-08-30 07:11:03,899 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 20 selfloop transitions, 5 changer transitions 2/27 dead transitions. [2023-08-30 07:11:03,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 132 flow [2023-08-30 07:11:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:11:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:11:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 373 transitions. [2023-08-30 07:11:03,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43625730994152045 [2023-08-30 07:11:03,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 373 transitions. [2023-08-30 07:11:03,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 373 transitions. [2023-08-30 07:11:03,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:03,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 373 transitions. [2023-08-30 07:11:03,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.6) internal successors, (373), 5 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,905 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,905 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 5 states and 373 transitions. [2023-08-30 07:11:03,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 132 flow [2023-08-30 07:11:03,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 123 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 07:11:03,906 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 75 flow [2023-08-30 07:11:03,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-30 07:11:03,907 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-08-30 07:11:03,907 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 75 flow [2023-08-30 07:11:03,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:03,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:03,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 07:11:03,908 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)] === [2023-08-30 07:11:03,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:03,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2104492941, now seen corresponding path program 2 times [2023-08-30 07:11:03,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:03,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388045144] [2023-08-30 07:11:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:03,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:03,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:03,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388045144] [2023-08-30 07:11:03,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388045144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:03,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639272512] [2023-08-30 07:11:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:11:03,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:03,965 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) [2023-08-30 07:11:03,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 07:11:04,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:11:04,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:04,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:11:04,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:04,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:11:04,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639272512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:11:04,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 07:11:04,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-08-30 07:11:04,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52011024] [2023-08-30 07:11:04,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:11:04,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:11:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:11:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:11:04,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 171 [2023-08-30 07:11:04,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:04,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 171 [2023-08-30 07:11:04,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:04,166 INFO L130 PetriNetUnfolder]: 62/112 cut-off events. [2023-08-30 07:11:04,166 INFO L131 PetriNetUnfolder]: For 46/53 co-relation queries the response was YES. [2023-08-30 07:11:04,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 112 events. 62/112 cut-off events. For 46/53 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 21 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 331. Up to 85 conditions per place. [2023-08-30 07:11:04,167 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2023-08-30 07:11:04,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 149 flow [2023-08-30 07:11:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:11:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:11:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 313 transitions. [2023-08-30 07:11:04,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45760233918128657 [2023-08-30 07:11:04,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 313 transitions. [2023-08-30 07:11:04,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 313 transitions. [2023-08-30 07:11:04,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:04,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 313 transitions. [2023-08-30 07:11:04,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,185 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,185 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 75 flow. Second operand 4 states and 313 transitions. [2023-08-30 07:11:04,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 149 flow [2023-08-30 07:11:04,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 139 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 07:11:04,186 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 89 flow [2023-08-30 07:11:04,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-30 07:11:04,187 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-08-30 07:11:04,187 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 89 flow [2023-08-30 07:11:04,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:04,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:04,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 07:11:04,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:04,394 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)] === [2023-08-30 07:11:04,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:04,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1859779205, now seen corresponding path program 1 times [2023-08-30 07:11:04,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:04,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758764291] [2023-08-30 07:11:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:04,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:11:04,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:04,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758764291] [2023-08-30 07:11:04,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758764291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:04,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398620380] [2023-08-30 07:11:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:04,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:04,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:04,477 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) [2023-08-30 07:11:04,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 07:11:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:04,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:11:04,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:11:04,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:11:04,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398620380] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:04,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:04,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-30 07:11:04,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164552598] [2023-08-30 07:11:04,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:04,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:11:04,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:11:04,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:11:04,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 171 [2023-08-30 07:11:04,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:04,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 171 [2023-08-30 07:11:04,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:04,732 INFO L130 PetriNetUnfolder]: 64/116 cut-off events. [2023-08-30 07:11:04,733 INFO L131 PetriNetUnfolder]: For 109/113 co-relation queries the response was YES. [2023-08-30 07:11:04,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 116 events. 64/116 cut-off events. For 109/113 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 10 based on Foata normal form. 4/101 useless extension candidates. Maximal degree in co-relation 373. Up to 81 conditions per place. [2023-08-30 07:11:04,735 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 26 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-08-30 07:11:04,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 208 flow [2023-08-30 07:11:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:11:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:11:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-08-30 07:11:04,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146198830409356 [2023-08-30 07:11:04,737 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-08-30 07:11:04,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-08-30 07:11:04,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:04,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-08-30 07:11:04,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,741 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,741 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 89 flow. Second operand 5 states and 386 transitions. [2023-08-30 07:11:04,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 208 flow [2023-08-30 07:11:04,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 188 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 07:11:04,745 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 120 flow [2023-08-30 07:11:04,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-08-30 07:11:04,746 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-08-30 07:11:04,746 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 120 flow [2023-08-30 07:11:04,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:04,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:04,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 07:11:04,952 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,SelfDestructingSolverStorable8 [2023-08-30 07:11:04,953 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)] === [2023-08-30 07:11:04,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash -972607855, now seen corresponding path program 2 times [2023-08-30 07:11:04,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:04,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433112159] [2023-08-30 07:11:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:04,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:05,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:05,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433112159] [2023-08-30 07:11:05,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433112159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:05,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212807116] [2023-08-30 07:11:05,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:11:05,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:05,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:05,085 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) [2023-08-30 07:11:05,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 07:11:05,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:11:05,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:11:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:05,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:05,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212807116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:05,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:05,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2023-08-30 07:11:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663594104] [2023-08-30 07:11:05,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:05,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:11:05,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:05,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:11:05,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:11:05,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-08-30 07:11:05,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 120 flow. Second operand has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:05,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:05,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-08-30 07:11:05,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:05,449 INFO L130 PetriNetUnfolder]: 112/210 cut-off events. [2023-08-30 07:11:05,450 INFO L131 PetriNetUnfolder]: For 246/250 co-relation queries the response was YES. [2023-08-30 07:11:05,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 210 events. 112/210 cut-off events. For 246/250 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 689 event pairs, 16 based on Foata normal form. 5/182 useless extension candidates. Maximal degree in co-relation 700. Up to 87 conditions per place. [2023-08-30 07:11:05,451 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 30 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-08-30 07:11:05,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 295 flow [2023-08-30 07:11:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:11:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:11:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 339 transitions. [2023-08-30 07:11:05,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956140350877193 [2023-08-30 07:11:05,453 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 339 transitions. [2023-08-30 07:11:05,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 339 transitions. [2023-08-30 07:11:05,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:05,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 339 transitions. [2023-08-30 07:11:05,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:05,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:05,456 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:05,456 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 120 flow. Second operand 4 states and 339 transitions. [2023-08-30 07:11:05,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 295 flow [2023-08-30 07:11:05,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 07:11:05,459 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 174 flow [2023-08-30 07:11:05,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-08-30 07:11:05,460 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-08-30 07:11:05,460 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 174 flow [2023-08-30 07:11:05,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:05,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:05,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:05,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:05,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:05,668 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)] === [2023-08-30 07:11:05,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash 289175066, now seen corresponding path program 3 times [2023-08-30 07:11:05,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:05,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644346098] [2023-08-30 07:11:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:05,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:05,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644346098] [2023-08-30 07:11:05,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644346098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:05,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749311623] [2023-08-30 07:11:05,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:11:05,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:05,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:05,793 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) [2023-08-30 07:11:05,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 07:11:05,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:11:05,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:05,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:11:05,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:05,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:06,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749311623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:06,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:06,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 07:11:06,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431040357] [2023-08-30 07:11:06,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:06,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 07:11:06,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:06,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 07:11:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-08-30 07:11:06,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:06,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 174 flow. Second operand has 18 states, 18 states have (on average 69.22222222222223) internal successors, (1246), 18 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:06,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:06,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:06,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:06,708 INFO L130 PetriNetUnfolder]: 259/482 cut-off events. [2023-08-30 07:11:06,709 INFO L131 PetriNetUnfolder]: For 945/945 co-relation queries the response was YES. [2023-08-30 07:11:06,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 482 events. 259/482 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1943 event pairs, 25 based on Foata normal form. 42/524 useless extension candidates. Maximal degree in co-relation 1749. Up to 165 conditions per place. [2023-08-30 07:11:06,712 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 78 selfloop transitions, 42 changer transitions 4/124 dead transitions. [2023-08-30 07:11:06,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 124 transitions, 845 flow [2023-08-30 07:11:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 07:11:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 07:11:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1455 transitions. [2023-08-30 07:11:06,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2023-08-30 07:11:06,717 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1455 transitions. [2023-08-30 07:11:06,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1455 transitions. [2023-08-30 07:11:06,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:06,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1455 transitions. [2023-08-30 07:11:06,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 72.75) internal successors, (1455), 20 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:06,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:06,726 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:06,726 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 174 flow. Second operand 20 states and 1455 transitions. [2023-08-30 07:11:06,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 124 transitions, 845 flow [2023-08-30 07:11:06,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 124 transitions, 841 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 07:11:06,731 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 561 flow [2023-08-30 07:11:06,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=561, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-30 07:11:06,732 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-08-30 07:11:06,732 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 561 flow [2023-08-30 07:11:06,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 69.22222222222223) internal successors, (1246), 18 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:06,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:06,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:06,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:06,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:06,939 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)] === [2023-08-30 07:11:06,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:06,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1047829290, now seen corresponding path program 4 times [2023-08-30 07:11:06,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:06,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29111271] [2023-08-30 07:11:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:06,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:07,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:07,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29111271] [2023-08-30 07:11:07,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29111271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:07,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278907481] [2023-08-30 07:11:07,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:11:07,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:07,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:07,045 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) [2023-08-30 07:11:07,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 07:11:07,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:11:07,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:11:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:07,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:07,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278907481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:07,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:07,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-30 07:11:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674391199] [2023-08-30 07:11:07,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:07,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:11:07,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:07,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:11:07,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:11:07,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:07,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 561 flow. Second operand has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:07,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:07,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:07,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:07,801 INFO L130 PetriNetUnfolder]: 393/744 cut-off events. [2023-08-30 07:11:07,801 INFO L131 PetriNetUnfolder]: For 4625/4625 co-relation queries the response was YES. [2023-08-30 07:11:07,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 744 events. 393/744 cut-off events. For 4625/4625 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3474 event pairs, 25 based on Foata normal form. 12/756 useless extension candidates. Maximal degree in co-relation 3989. Up to 280 conditions per place. [2023-08-30 07:11:07,808 INFO L137 encePairwiseOnDemand]: 165/171 looper letters, 87 selfloop transitions, 47 changer transitions 11/145 dead transitions. [2023-08-30 07:11:07,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 145 transitions, 1456 flow [2023-08-30 07:11:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:11:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:11:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1171 transitions. [2023-08-30 07:11:07,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279970760233918 [2023-08-30 07:11:07,813 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1171 transitions. [2023-08-30 07:11:07,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1171 transitions. [2023-08-30 07:11:07,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:07,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1171 transitions. [2023-08-30 07:11:07,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.1875) internal successors, (1171), 16 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:07,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 171.0) internal successors, (2907), 17 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:07,820 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 171.0) internal successors, (2907), 17 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:07,820 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 561 flow. Second operand 16 states and 1171 transitions. [2023-08-30 07:11:07,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 145 transitions, 1456 flow [2023-08-30 07:11:07,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 145 transitions, 1294 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-08-30 07:11:07,838 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 825 flow [2023-08-30 07:11:07,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=825, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2023-08-30 07:11:07,840 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-08-30 07:11:07,840 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 825 flow [2023-08-30 07:11:07,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:07,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:07,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:07,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:08,047 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,SelfDestructingSolverStorable11 [2023-08-30 07:11:08,047 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)] === [2023-08-30 07:11:08,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:08,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1350612766, now seen corresponding path program 5 times [2023-08-30 07:11:08,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:08,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311771871] [2023-08-30 07:11:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:08,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:08,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:08,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311771871] [2023-08-30 07:11:08,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311771871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:08,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136077832] [2023-08-30 07:11:08,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:11:08,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:08,174 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) [2023-08-30 07:11:08,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 07:11:08,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:11:08,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:08,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:11:08,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:08,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:08,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136077832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:08,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:08,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 07:11:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043153258] [2023-08-30 07:11:08,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:08,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 07:11:08,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 07:11:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-30 07:11:08,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:08,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 825 flow. Second operand has 17 states, 17 states have (on average 69.52941176470588) internal successors, (1182), 17 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:08,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:08,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:08,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:08,977 INFO L130 PetriNetUnfolder]: 510/956 cut-off events. [2023-08-30 07:11:08,977 INFO L131 PetriNetUnfolder]: For 9182/9182 co-relation queries the response was YES. [2023-08-30 07:11:08,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5533 conditions, 956 events. 510/956 cut-off events. For 9182/9182 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4775 event pairs, 7 based on Foata normal form. 38/994 useless extension candidates. Maximal degree in co-relation 5506. Up to 439 conditions per place. [2023-08-30 07:11:08,987 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 84 selfloop transitions, 74 changer transitions 1/159 dead transitions. [2023-08-30 07:11:08,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 159 transitions, 1768 flow [2023-08-30 07:11:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 07:11:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 07:11:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1235 transitions. [2023-08-30 07:11:08,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42483660130718953 [2023-08-30 07:11:08,992 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1235 transitions. [2023-08-30 07:11:08,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1235 transitions. [2023-08-30 07:11:08,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:08,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1235 transitions. [2023-08-30 07:11:08,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 72.6470588235294) internal successors, (1235), 17 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:08,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:09,000 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:09,000 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 825 flow. Second operand 17 states and 1235 transitions. [2023-08-30 07:11:09,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 159 transitions, 1768 flow [2023-08-30 07:11:09,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 159 transitions, 1623 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-08-30 07:11:09,029 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 1382 flow [2023-08-30 07:11:09,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1382, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2023-08-30 07:11:09,030 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-08-30 07:11:09,030 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 1382 flow [2023-08-30 07:11:09,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.52941176470588) internal successors, (1182), 17 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:09,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:09,031 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:09,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:09,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:09,238 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)] === [2023-08-30 07:11:09,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:09,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2114754455, now seen corresponding path program 6 times [2023-08-30 07:11:09,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:09,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108741872] [2023-08-30 07:11:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:09,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:09,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:09,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108741872] [2023-08-30 07:11:09,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108741872] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:09,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901367487] [2023-08-30 07:11:09,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:11:09,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:09,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:09,361 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) [2023-08-30 07:11:09,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 07:11:09,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:11:09,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:09,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:11:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:09,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901367487] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:09,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:09,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 07:11:09,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284621436] [2023-08-30 07:11:09,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 07:11:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:09,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 07:11:09,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-08-30 07:11:09,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:09,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 1382 flow. Second operand has 20 states, 20 states have (on average 69.05) internal successors, (1381), 20 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:09,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:09,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:09,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:10,325 INFO L130 PetriNetUnfolder]: 703/1373 cut-off events. [2023-08-30 07:11:10,326 INFO L131 PetriNetUnfolder]: For 31723/31723 co-relation queries the response was YES. [2023-08-30 07:11:10,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10356 conditions, 1373 events. 703/1373 cut-off events. For 31723/31723 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8014 event pairs, 18 based on Foata normal form. 16/1389 useless extension candidates. Maximal degree in co-relation 10320. Up to 417 conditions per place. [2023-08-30 07:11:10,343 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 118 selfloop transitions, 142 changer transitions 12/272 dead transitions. [2023-08-30 07:11:10,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 272 transitions, 3822 flow [2023-08-30 07:11:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 07:11:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 07:11:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1808 transitions. [2023-08-30 07:11:10,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42292397660818715 [2023-08-30 07:11:10,353 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1808 transitions. [2023-08-30 07:11:10,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1808 transitions. [2023-08-30 07:11:10,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:10,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1808 transitions. [2023-08-30 07:11:10,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 72.32) internal successors, (1808), 25 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:10,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:10,369 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:10,369 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 1382 flow. Second operand 25 states and 1808 transitions. [2023-08-30 07:11:10,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 272 transitions, 3822 flow [2023-08-30 07:11:10,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 272 transitions, 3649 flow, removed 77 selfloop flow, removed 5 redundant places. [2023-08-30 07:11:10,539 INFO L231 Difference]: Finished difference. Result has 135 places, 183 transitions, 2833 flow [2023-08-30 07:11:10,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2833, PETRI_PLACES=135, PETRI_TRANSITIONS=183} [2023-08-30 07:11:10,540 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2023-08-30 07:11:10,540 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 183 transitions, 2833 flow [2023-08-30 07:11:10,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 69.05) internal successors, (1381), 20 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:10,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:10,541 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:10,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:10,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:10,748 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)] === [2023-08-30 07:11:10,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1554108490, now seen corresponding path program 7 times [2023-08-30 07:11:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:10,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835995667] [2023-08-30 07:11:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:10,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:10,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835995667] [2023-08-30 07:11:10,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835995667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:10,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748632083] [2023-08-30 07:11:10,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:11:10,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:10,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:10,867 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) [2023-08-30 07:11:10,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 07:11:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:11:10,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:11,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:11,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748632083] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:11,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:11,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 07:11:11,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998679864] [2023-08-30 07:11:11,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:11,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 07:11:11,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 07:11:11,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-08-30 07:11:11,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:11,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 183 transitions, 2833 flow. Second operand has 16 states, 16 states have (on average 69.4375) internal successors, (1111), 16 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:11,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:11,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:11,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:11,881 INFO L130 PetriNetUnfolder]: 666/1353 cut-off events. [2023-08-30 07:11:11,882 INFO L131 PetriNetUnfolder]: For 51531/51531 co-relation queries the response was YES. [2023-08-30 07:11:11,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11365 conditions, 1353 events. 666/1353 cut-off events. For 51531/51531 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8153 event pairs, 55 based on Foata normal form. 50/1403 useless extension candidates. Maximal degree in co-relation 11319. Up to 506 conditions per place. [2023-08-30 07:11:11,902 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 117 selfloop transitions, 136 changer transitions 8/261 dead transitions. [2023-08-30 07:11:11,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 261 transitions, 4075 flow [2023-08-30 07:11:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 07:11:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 07:11:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1594 transitions. [2023-08-30 07:11:11,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42371079213184476 [2023-08-30 07:11:11,906 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1594 transitions. [2023-08-30 07:11:11,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1594 transitions. [2023-08-30 07:11:11,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:11,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1594 transitions. [2023-08-30 07:11:11,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.45454545454545) internal successors, (1594), 22 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:11,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:11,915 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:11,916 INFO L175 Difference]: Start difference. First operand has 135 places, 183 transitions, 2833 flow. Second operand 22 states and 1594 transitions. [2023-08-30 07:11:11,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 261 transitions, 4075 flow [2023-08-30 07:11:12,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 261 transitions, 3342 flow, removed 356 selfloop flow, removed 6 redundant places. [2023-08-30 07:11:12,046 INFO L231 Difference]: Finished difference. Result has 153 places, 191 transitions, 2703 flow [2023-08-30 07:11:12,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2703, PETRI_PLACES=153, PETRI_TRANSITIONS=191} [2023-08-30 07:11:12,047 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2023-08-30 07:11:12,047 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 191 transitions, 2703 flow [2023-08-30 07:11:12,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.4375) internal successors, (1111), 16 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:12,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:12,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:12,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:12,253 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,SelfDestructingSolverStorable14 [2023-08-30 07:11:12,254 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)] === [2023-08-30 07:11:12,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:12,255 INFO L85 PathProgramCache]: Analyzing trace with hash -543608332, now seen corresponding path program 8 times [2023-08-30 07:11:12,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:12,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107944878] [2023-08-30 07:11:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:12,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:12,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:12,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107944878] [2023-08-30 07:11:12,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107944878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:12,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198180740] [2023-08-30 07:11:12,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:11:12,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:12,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:12,413 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) [2023-08-30 07:11:12,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 07:11:12,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:11:12,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:12,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:11:12,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:12,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198180740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:12,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-30 07:11:12,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390049950] [2023-08-30 07:11:12,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:12,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 07:11:12,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:12,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 07:11:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 07:11:12,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:12,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 191 transitions, 2703 flow. Second operand has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 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) [2023-08-30 07:11:12,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:12,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:12,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:13,247 INFO L130 PetriNetUnfolder]: 657/1313 cut-off events. [2023-08-30 07:11:13,247 INFO L131 PetriNetUnfolder]: For 42327/42327 co-relation queries the response was YES. [2023-08-30 07:11:13,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10418 conditions, 1313 events. 657/1313 cut-off events. For 42327/42327 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7846 event pairs, 17 based on Foata normal form. 8/1321 useless extension candidates. Maximal degree in co-relation 10371. Up to 408 conditions per place. [2023-08-30 07:11:13,263 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 141 selfloop transitions, 108 changer transitions 9/258 dead transitions. [2023-08-30 07:11:13,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 258 transitions, 3951 flow [2023-08-30 07:11:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 07:11:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 07:11:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1435 transitions. [2023-08-30 07:11:13,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195906432748538 [2023-08-30 07:11:13,267 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1435 transitions. [2023-08-30 07:11:13,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1435 transitions. [2023-08-30 07:11:13,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:13,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1435 transitions. [2023-08-30 07:11:13,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 71.75) internal successors, (1435), 20 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:13,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:13,275 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:13,275 INFO L175 Difference]: Start difference. First operand has 153 places, 191 transitions, 2703 flow. Second operand 20 states and 1435 transitions. [2023-08-30 07:11:13,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 258 transitions, 3951 flow [2023-08-30 07:11:13,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 258 transitions, 3828 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-08-30 07:11:13,380 INFO L231 Difference]: Finished difference. Result has 163 places, 207 transitions, 3137 flow [2023-08-30 07:11:13,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3137, PETRI_PLACES=163, PETRI_TRANSITIONS=207} [2023-08-30 07:11:13,380 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2023-08-30 07:11:13,381 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 207 transitions, 3137 flow [2023-08-30 07:11:13,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 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) [2023-08-30 07:11:13,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:13,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:13,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:13,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 07:11:13,587 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)] === [2023-08-30 07:11:13,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:13,588 INFO L85 PathProgramCache]: Analyzing trace with hash -508746160, now seen corresponding path program 9 times [2023-08-30 07:11:13,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:13,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398125771] [2023-08-30 07:11:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:13,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:13,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398125771] [2023-08-30 07:11:13,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398125771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:13,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446410661] [2023-08-30 07:11:13,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:11:13,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:13,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:13,724 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) [2023-08-30 07:11:13,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 07:11:13,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:11:13,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:13,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:11:13,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:13,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:14,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446410661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:14,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:14,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-08-30 07:11:14,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658292156] [2023-08-30 07:11:14,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:14,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 07:11:14,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:14,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 07:11:14,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:11:14,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-08-30 07:11:14,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 207 transitions, 3137 flow. Second operand has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:14,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:14,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-08-30 07:11:14,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:14,500 INFO L130 PetriNetUnfolder]: 1070/2125 cut-off events. [2023-08-30 07:11:14,500 INFO L131 PetriNetUnfolder]: For 87960/87969 co-relation queries the response was YES. [2023-08-30 07:11:14,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18666 conditions, 2125 events. 1070/2125 cut-off events. For 87960/87969 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14061 event pairs, 155 based on Foata normal form. 9/2127 useless extension candidates. Maximal degree in co-relation 18615. Up to 905 conditions per place. [2023-08-30 07:11:14,531 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 208 selfloop transitions, 102 changer transitions 68/386 dead transitions. [2023-08-30 07:11:14,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 386 transitions, 6641 flow [2023-08-30 07:11:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:11:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:11:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2023-08-30 07:11:14,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4982456140350877 [2023-08-30 07:11:14,533 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 426 transitions. [2023-08-30 07:11:14,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 426 transitions. [2023-08-30 07:11:14,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:14,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 426 transitions. [2023-08-30 07:11:14,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:14,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:14,537 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:14,537 INFO L175 Difference]: Start difference. First operand has 163 places, 207 transitions, 3137 flow. Second operand 5 states and 426 transitions. [2023-08-30 07:11:14,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 386 transitions, 6641 flow [2023-08-30 07:11:14,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 386 transitions, 6296 flow, removed 143 selfloop flow, removed 6 redundant places. [2023-08-30 07:11:14,735 INFO L231 Difference]: Finished difference. Result has 163 places, 273 transitions, 4630 flow [2023-08-30 07:11:14,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4630, PETRI_PLACES=163, PETRI_TRANSITIONS=273} [2023-08-30 07:11:14,736 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2023-08-30 07:11:14,736 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 273 transitions, 4630 flow [2023-08-30 07:11:14,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:14,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:14,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:14,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 07:11:14,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 07:11:14,943 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)] === [2023-08-30 07:11:14,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1342540044, now seen corresponding path program 10 times [2023-08-30 07:11:14,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:14,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994895953] [2023-08-30 07:11:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:15,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:15,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994895953] [2023-08-30 07:11:15,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994895953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:15,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507771472] [2023-08-30 07:11:15,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:11:15,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:15,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:15,109 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) [2023-08-30 07:11:15,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 07:11:15,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:11:15,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:15,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:11:15,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:11:15,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:11:15,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507771472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:15,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:15,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 11 [2023-08-30 07:11:15,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207885122] [2023-08-30 07:11:15,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:15,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:11:15,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:15,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:11:15,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:11:15,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:15,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 273 transitions, 4630 flow. Second operand has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:15,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:15,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:15,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:16,100 INFO L130 PetriNetUnfolder]: 1044/2130 cut-off events. [2023-08-30 07:11:16,101 INFO L131 PetriNetUnfolder]: For 100983/100983 co-relation queries the response was YES. [2023-08-30 07:11:16,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18833 conditions, 2130 events. 1044/2130 cut-off events. For 100983/100983 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14360 event pairs, 144 based on Foata normal form. 78/2208 useless extension candidates. Maximal degree in co-relation 18779. Up to 1558 conditions per place. [2023-08-30 07:11:16,129 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 262 selfloop transitions, 92 changer transitions 50/404 dead transitions. [2023-08-30 07:11:16,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 404 transitions, 7078 flow [2023-08-30 07:11:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 07:11:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 07:11:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1393 transitions. [2023-08-30 07:11:16,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42874730686365037 [2023-08-30 07:11:16,132 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1393 transitions. [2023-08-30 07:11:16,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1393 transitions. [2023-08-30 07:11:16,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:16,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1393 transitions. [2023-08-30 07:11:16,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 73.3157894736842) internal successors, (1393), 19 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:16,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 171.0) internal successors, (3420), 20 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:16,139 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 171.0) internal successors, (3420), 20 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:16,139 INFO L175 Difference]: Start difference. First operand has 163 places, 273 transitions, 4630 flow. Second operand 19 states and 1393 transitions. [2023-08-30 07:11:16,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 404 transitions, 7078 flow [2023-08-30 07:11:16,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 404 transitions, 7004 flow, removed 37 selfloop flow, removed 0 redundant places. [2023-08-30 07:11:16,427 INFO L231 Difference]: Finished difference. Result has 188 places, 306 transitions, 5559 flow [2023-08-30 07:11:16,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5559, PETRI_PLACES=188, PETRI_TRANSITIONS=306} [2023-08-30 07:11:16,428 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2023-08-30 07:11:16,428 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 306 transitions, 5559 flow [2023-08-30 07:11:16,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:16,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:16,429 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:16,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:16,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 07:11:16,634 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)] === [2023-08-30 07:11:16,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:16,635 INFO L85 PathProgramCache]: Analyzing trace with hash 97342477, now seen corresponding path program 11 times [2023-08-30 07:11:16,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:16,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286872529] [2023-08-30 07:11:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:16,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286872529] [2023-08-30 07:11:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286872529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923058617] [2023-08-30 07:11:16,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:11:16,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:16,805 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) [2023-08-30 07:11:16,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 07:11:16,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:11:16,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:16,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:11:16,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:16,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:17,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923058617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:17,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:17,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 07:11:17,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410012176] [2023-08-30 07:11:17,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:17,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 07:11:17,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:17,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 07:11:17,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-08-30 07:11:17,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:17,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 306 transitions, 5559 flow. Second operand has 21 states, 21 states have (on average 69.19047619047619) internal successors, (1453), 21 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:17,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:17,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:17,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:18,548 INFO L130 PetriNetUnfolder]: 1329/2704 cut-off events. [2023-08-30 07:11:18,549 INFO L131 PetriNetUnfolder]: For 169816/169816 co-relation queries the response was YES. [2023-08-30 07:11:18,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26768 conditions, 2704 events. 1329/2704 cut-off events. For 169816/169816 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 19148 event pairs, 68 based on Foata normal form. 36/2740 useless extension candidates. Maximal degree in co-relation 26706. Up to 717 conditions per place. [2023-08-30 07:11:18,592 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 168 selfloop transitions, 317 changer transitions 55/540 dead transitions. [2023-08-30 07:11:18,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 540 transitions, 9909 flow [2023-08-30 07:11:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:11:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:11:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1760 transitions. [2023-08-30 07:11:18,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42884990253411304 [2023-08-30 07:11:18,598 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1760 transitions. [2023-08-30 07:11:18,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1760 transitions. [2023-08-30 07:11:18,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:18,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1760 transitions. [2023-08-30 07:11:18,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 73.33333333333333) internal successors, (1760), 24 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:18,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:18,607 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:18,607 INFO L175 Difference]: Start difference. First operand has 188 places, 306 transitions, 5559 flow. Second operand 24 states and 1760 transitions. [2023-08-30 07:11:18,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 540 transitions, 9909 flow [2023-08-30 07:11:18,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 540 transitions, 9641 flow, removed 74 selfloop flow, removed 7 redundant places. [2023-08-30 07:11:18,934 INFO L231 Difference]: Finished difference. Result has 211 places, 382 transitions, 7926 flow [2023-08-30 07:11:18,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7926, PETRI_PLACES=211, PETRI_TRANSITIONS=382} [2023-08-30 07:11:18,934 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 182 predicate places. [2023-08-30 07:11:18,935 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 382 transitions, 7926 flow [2023-08-30 07:11:18,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 69.19047619047619) internal successors, (1453), 21 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:18,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:18,935 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:18,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:19,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:19,142 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)] === [2023-08-30 07:11:19,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:19,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1634372773, now seen corresponding path program 12 times [2023-08-30 07:11:19,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:19,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648172142] [2023-08-30 07:11:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:19,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:19,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:19,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648172142] [2023-08-30 07:11:19,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648172142] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:19,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54811244] [2023-08-30 07:11:19,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:11:19,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:19,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:19,331 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) [2023-08-30 07:11:19,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 07:11:19,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:11:19,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:19,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:11:19,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:19,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:19,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54811244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:19,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:19,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2023-08-30 07:11:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960287659] [2023-08-30 07:11:19,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:19,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:11:19,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:11:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:11:19,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-08-30 07:11:19,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 382 transitions, 7926 flow. Second operand has 12 states, 12 states have (on average 78.58333333333333) internal successors, (943), 12 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:19,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:19,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-08-30 07:11:19,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:20,909 INFO L130 PetriNetUnfolder]: 1938/3896 cut-off events. [2023-08-30 07:11:20,910 INFO L131 PetriNetUnfolder]: For 273883/273892 co-relation queries the response was YES. [2023-08-30 07:11:20,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42427 conditions, 3896 events. 1938/3896 cut-off events. For 273883/273892 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29430 event pairs, 284 based on Foata normal form. 7/3898 useless extension candidates. Maximal degree in co-relation 42358. Up to 1434 conditions per place. [2023-08-30 07:11:20,980 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 318 selfloop transitions, 284 changer transitions 41/652 dead transitions. [2023-08-30 07:11:20,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 652 transitions, 14325 flow [2023-08-30 07:11:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:11:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:11:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 513 transitions. [2023-08-30 07:11:20,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 07:11:20,982 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 513 transitions. [2023-08-30 07:11:20,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 513 transitions. [2023-08-30 07:11:20,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:20,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 513 transitions. [2023-08-30 07:11:20,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:20,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:20,984 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:20,985 INFO L175 Difference]: Start difference. First operand has 211 places, 382 transitions, 7926 flow. Second operand 6 states and 513 transitions. [2023-08-30 07:11:20,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 652 transitions, 14325 flow [2023-08-30 07:11:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 652 transitions, 13556 flow, removed 350 selfloop flow, removed 9 redundant places. [2023-08-30 07:11:21,607 INFO L231 Difference]: Finished difference. Result has 211 places, 530 transitions, 11906 flow [2023-08-30 07:11:21,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11906, PETRI_PLACES=211, PETRI_TRANSITIONS=530} [2023-08-30 07:11:21,607 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 182 predicate places. [2023-08-30 07:11:21,608 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 530 transitions, 11906 flow [2023-08-30 07:11:21,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 78.58333333333333) internal successors, (943), 12 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:21,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:21,608 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:21,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:21,808 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,SelfDestructingSolverStorable19 [2023-08-30 07:11:21,809 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)] === [2023-08-30 07:11:21,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1102853091, now seen corresponding path program 13 times [2023-08-30 07:11:21,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:21,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008529336] [2023-08-30 07:11:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:21,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:21,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:21,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008529336] [2023-08-30 07:11:21,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008529336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:21,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851252727] [2023-08-30 07:11:21,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:11:21,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:21,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:21,962 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) [2023-08-30 07:11:21,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 07:11:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:22,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:11:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:22,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:22,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851252727] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:22,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:22,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 07:11:22,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872270619] [2023-08-30 07:11:22,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:22,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 07:11:22,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:22,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 07:11:22,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-08-30 07:11:22,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:22,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 530 transitions, 11906 flow. Second operand has 21 states, 21 states have (on average 69.04761904761905) internal successors, (1450), 21 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:22,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:22,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:22,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:24,747 INFO L130 PetriNetUnfolder]: 2318/4786 cut-off events. [2023-08-30 07:11:24,748 INFO L131 PetriNetUnfolder]: For 423533/423533 co-relation queries the response was YES. [2023-08-30 07:11:24,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53290 conditions, 4786 events. 2318/4786 cut-off events. For 423533/423533 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38363 event pairs, 141 based on Foata normal form. 178/4964 useless extension candidates. Maximal degree in co-relation 53220. Up to 1295 conditions per place. [2023-08-30 07:11:24,813 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 206 selfloop transitions, 576 changer transitions 28/810 dead transitions. [2023-08-30 07:11:24,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 810 transitions, 18389 flow [2023-08-30 07:11:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 07:11:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 07:11:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2413 transitions. [2023-08-30 07:11:24,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276094276094276 [2023-08-30 07:11:24,818 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2413 transitions. [2023-08-30 07:11:24,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2413 transitions. [2023-08-30 07:11:24,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:24,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2413 transitions. [2023-08-30 07:11:24,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 73.12121212121212) internal successors, (2413), 33 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:24,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:24,828 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:24,829 INFO L175 Difference]: Start difference. First operand has 211 places, 530 transitions, 11906 flow. Second operand 33 states and 2413 transitions. [2023-08-30 07:11:24,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 810 transitions, 18389 flow [2023-08-30 07:11:25,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 810 transitions, 18089 flow, removed 144 selfloop flow, removed 1 redundant places. [2023-08-30 07:11:25,777 INFO L231 Difference]: Finished difference. Result has 251 places, 644 transitions, 16311 flow [2023-08-30 07:11:25,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=11708, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=16311, PETRI_PLACES=251, PETRI_TRANSITIONS=644} [2023-08-30 07:11:25,778 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 222 predicate places. [2023-08-30 07:11:25,778 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 644 transitions, 16311 flow [2023-08-30 07:11:25,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 69.04761904761905) internal successors, (1450), 21 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:25,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:25,779 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:25,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:25,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:25,985 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)] === [2023-08-30 07:11:25,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -59131429, now seen corresponding path program 14 times [2023-08-30 07:11:25,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:25,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154945416] [2023-08-30 07:11:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:25,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:26,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:26,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154945416] [2023-08-30 07:11:26,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154945416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:26,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915200230] [2023-08-30 07:11:26,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:11:26,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:26,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:26,125 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) [2023-08-30 07:11:26,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 07:11:26,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:11:26,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:26,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:11:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:26,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:26,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915200230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:26,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:26,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 07:11:26,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633864822] [2023-08-30 07:11:26,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:26,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 07:11:26,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 07:11:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-08-30 07:11:26,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:26,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 644 transitions, 16311 flow. Second operand has 21 states, 21 states have (on average 68.95238095238095) internal successors, (1448), 21 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:26,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:26,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:26,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:28,828 INFO L130 PetriNetUnfolder]: 2238/4514 cut-off events. [2023-08-30 07:11:28,828 INFO L131 PetriNetUnfolder]: For 436487/436487 co-relation queries the response was YES. [2023-08-30 07:11:28,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55618 conditions, 4514 events. 2238/4514 cut-off events. For 436487/436487 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35004 event pairs, 48 based on Foata normal form. 50/4564 useless extension candidates. Maximal degree in co-relation 55539. Up to 1227 conditions per place. [2023-08-30 07:11:28,910 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 149 selfloop transitions, 594 changer transitions 32/775 dead transitions. [2023-08-30 07:11:28,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 775 transitions, 19717 flow [2023-08-30 07:11:28,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 07:11:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 07:11:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2527 transitions. [2023-08-30 07:11:28,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-08-30 07:11:28,916 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2527 transitions. [2023-08-30 07:11:28,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2527 transitions. [2023-08-30 07:11:28,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:28,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2527 transitions. [2023-08-30 07:11:28,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 72.2) internal successors, (2527), 35 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:28,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 171.0) internal successors, (6156), 36 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:28,938 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 171.0) internal successors, (6156), 36 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:28,939 INFO L175 Difference]: Start difference. First operand has 251 places, 644 transitions, 16311 flow. Second operand 35 states and 2527 transitions. [2023-08-30 07:11:28,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 775 transitions, 19717 flow [2023-08-30 07:11:30,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 775 transitions, 19004 flow, removed 274 selfloop flow, removed 16 redundant places. [2023-08-30 07:11:30,517 INFO L231 Difference]: Finished difference. Result has 272 places, 649 transitions, 17165 flow [2023-08-30 07:11:30,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=15164, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=17165, PETRI_PLACES=272, PETRI_TRANSITIONS=649} [2023-08-30 07:11:30,518 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 243 predicate places. [2023-08-30 07:11:30,519 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 649 transitions, 17165 flow [2023-08-30 07:11:30,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 68.95238095238095) internal successors, (1448), 21 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:30,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:30,519 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:30,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:30,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:30,725 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)] === [2023-08-30 07:11:30,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash 146428741, now seen corresponding path program 15 times [2023-08-30 07:11:30,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:30,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995599466] [2023-08-30 07:11:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:30,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:30,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:30,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995599466] [2023-08-30 07:11:30,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995599466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:30,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151756636] [2023-08-30 07:11:30,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:11:30,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:30,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:30,880 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) [2023-08-30 07:11:30,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 07:11:30,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:11:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:11:30,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:31,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:31,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151756636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:31,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:31,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 07:11:31,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84923417] [2023-08-30 07:11:31,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:31,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:11:31,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:31,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:11:31,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:11:31,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:31,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 649 transitions, 17165 flow. Second operand has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:31,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:31,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:31,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:33,681 INFO L130 PetriNetUnfolder]: 2558/5151 cut-off events. [2023-08-30 07:11:33,682 INFO L131 PetriNetUnfolder]: For 523784/523784 co-relation queries the response was YES. [2023-08-30 07:11:33,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63644 conditions, 5151 events. 2558/5151 cut-off events. For 523784/523784 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40995 event pairs, 0 based on Foata normal form. 78/5229 useless extension candidates. Maximal degree in co-relation 63564. Up to 2052 conditions per place. [2023-08-30 07:11:33,746 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 510 selfloop transitions, 421 changer transitions 9/940 dead transitions. [2023-08-30 07:11:33,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 940 transitions, 24645 flow [2023-08-30 07:11:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 07:11:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 07:11:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2387 transitions. [2023-08-30 07:11:33,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42300194931773877 [2023-08-30 07:11:33,750 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2387 transitions. [2023-08-30 07:11:33,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2387 transitions. [2023-08-30 07:11:33,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:33,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2387 transitions. [2023-08-30 07:11:33,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.33333333333333) internal successors, (2387), 33 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:33,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:33,761 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:33,761 INFO L175 Difference]: Start difference. First operand has 272 places, 649 transitions, 17165 flow. Second operand 33 states and 2387 transitions. [2023-08-30 07:11:33,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 940 transitions, 24645 flow [2023-08-30 07:11:35,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 940 transitions, 23522 flow, removed 371 selfloop flow, removed 11 redundant places. [2023-08-30 07:11:35,520 INFO L231 Difference]: Finished difference. Result has 299 places, 794 transitions, 21345 flow [2023-08-30 07:11:35,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=16336, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21345, PETRI_PLACES=299, PETRI_TRANSITIONS=794} [2023-08-30 07:11:35,521 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 270 predicate places. [2023-08-30 07:11:35,521 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 794 transitions, 21345 flow [2023-08-30 07:11:35,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:35,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:35,521 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:35,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:35,722 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,SelfDestructingSolverStorable22 [2023-08-30 07:11:35,722 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)] === [2023-08-30 07:11:35,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2135138407, now seen corresponding path program 16 times [2023-08-30 07:11:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:35,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023175672] [2023-08-30 07:11:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:35,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:35,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:35,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023175672] [2023-08-30 07:11:35,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023175672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:35,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544944389] [2023-08-30 07:11:35,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:11:35,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:35,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:35,880 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) [2023-08-30 07:11:35,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 07:11:35,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:11:35,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:35,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:11:35,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:36,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:11:36,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544944389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:36,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:36,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-08-30 07:11:36,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74005649] [2023-08-30 07:11:36,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:36,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 07:11:36,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 07:11:36,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-30 07:11:36,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:36,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 794 transitions, 21345 flow. Second operand has 20 states, 20 states have (on average 69.1) internal successors, (1382), 20 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:36,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:36,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:36,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:38,451 INFO L130 PetriNetUnfolder]: 2658/5331 cut-off events. [2023-08-30 07:11:38,451 INFO L131 PetriNetUnfolder]: For 530940/530940 co-relation queries the response was YES. [2023-08-30 07:11:38,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67399 conditions, 5331 events. 2658/5331 cut-off events. For 530940/530940 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 42573 event pairs, 185 based on Foata normal form. 40/5371 useless extension candidates. Maximal degree in co-relation 67311. Up to 4076 conditions per place. [2023-08-30 07:11:38,541 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 659 selfloop transitions, 256 changer transitions 5/920 dead transitions. [2023-08-30 07:11:38,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 920 transitions, 25396 flow [2023-08-30 07:11:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 07:11:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 07:11:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1592 transitions. [2023-08-30 07:11:38,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42317916002126527 [2023-08-30 07:11:38,546 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1592 transitions. [2023-08-30 07:11:38,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1592 transitions. [2023-08-30 07:11:38,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:38,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1592 transitions. [2023-08-30 07:11:38,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.36363636363636) internal successors, (1592), 22 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:38,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:38,556 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:38,557 INFO L175 Difference]: Start difference. First operand has 299 places, 794 transitions, 21345 flow. Second operand 22 states and 1592 transitions. [2023-08-30 07:11:38,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 920 transitions, 25396 flow [2023-08-30 07:11:41,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 920 transitions, 24473 flow, removed 375 selfloop flow, removed 14 redundant places. [2023-08-30 07:11:41,362 INFO L231 Difference]: Finished difference. Result has 311 places, 834 transitions, 22403 flow [2023-08-30 07:11:41,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=20446, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=22403, PETRI_PLACES=311, PETRI_TRANSITIONS=834} [2023-08-30 07:11:41,363 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 282 predicate places. [2023-08-30 07:11:41,363 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 834 transitions, 22403 flow [2023-08-30 07:11:41,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 69.1) internal successors, (1382), 20 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:41,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:41,363 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:41,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:41,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:41,564 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)] === [2023-08-30 07:11:41,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash 175668191, now seen corresponding path program 17 times [2023-08-30 07:11:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:41,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142716833] [2023-08-30 07:11:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:41,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:41,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:41,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142716833] [2023-08-30 07:11:41,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142716833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:41,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419438306] [2023-08-30 07:11:41,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:11:41,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:41,789 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) [2023-08-30 07:11:41,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 07:11:41,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 07:11:41,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:41,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:11:41,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:41,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:42,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419438306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:42,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:42,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-30 07:11:42,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517080489] [2023-08-30 07:11:42,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:42,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 07:11:42,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:42,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 07:11:42,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-08-30 07:11:42,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:42,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 834 transitions, 22403 flow. Second operand has 23 states, 23 states have (on average 68.95652173913044) internal successors, (1586), 23 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:42,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:42,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:42,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:44,944 INFO L130 PetriNetUnfolder]: 3344/6665 cut-off events. [2023-08-30 07:11:44,944 INFO L131 PetriNetUnfolder]: For 440084/440084 co-relation queries the response was YES. [2023-08-30 07:11:44,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76744 conditions, 6665 events. 3344/6665 cut-off events. For 440084/440084 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 54862 event pairs, 115 based on Foata normal form. 168/6833 useless extension candidates. Maximal degree in co-relation 76655. Up to 2171 conditions per place. [2023-08-30 07:11:45,162 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 341 selfloop transitions, 816 changer transitions 16/1173 dead transitions. [2023-08-30 07:11:45,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1173 transitions, 32454 flow [2023-08-30 07:11:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 07:11:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 07:11:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2246 transitions. [2023-08-30 07:11:45,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42369364270892285 [2023-08-30 07:11:45,167 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2246 transitions. [2023-08-30 07:11:45,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2246 transitions. [2023-08-30 07:11:45,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:45,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2246 transitions. [2023-08-30 07:11:45,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 72.45161290322581) internal successors, (2246), 31 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:45,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 171.0) internal successors, (5472), 32 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:45,178 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 171.0) internal successors, (5472), 32 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:45,178 INFO L175 Difference]: Start difference. First operand has 311 places, 834 transitions, 22403 flow. Second operand 31 states and 2246 transitions. [2023-08-30 07:11:45,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1173 transitions, 32454 flow [2023-08-30 07:11:47,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1173 transitions, 32210 flow, removed 54 selfloop flow, removed 10 redundant places. [2023-08-30 07:11:47,177 INFO L231 Difference]: Finished difference. Result has 340 places, 1043 transitions, 30535 flow [2023-08-30 07:11:47,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=22162, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=30535, PETRI_PLACES=340, PETRI_TRANSITIONS=1043} [2023-08-30 07:11:47,178 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 311 predicate places. [2023-08-30 07:11:47,178 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1043 transitions, 30535 flow [2023-08-30 07:11:47,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 68.95652173913044) internal successors, (1586), 23 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:47,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:47,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:47,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:47,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:47,380 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)] === [2023-08-30 07:11:47,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:47,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1116808075, now seen corresponding path program 18 times [2023-08-30 07:11:47,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:47,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722893467] [2023-08-30 07:11:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:47,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:47,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722893467] [2023-08-30 07:11:47,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722893467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:47,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855602189] [2023-08-30 07:11:47,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:11:47,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:47,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:47,537 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) [2023-08-30 07:11:47,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 07:11:47,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:11:47,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:11:47,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:47,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:47,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855602189] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:47,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:47,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 07:11:47,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669958198] [2023-08-30 07:11:47,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:47,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:11:47,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:47,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:11:47,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:11:48,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:48,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1043 transitions, 30535 flow. Second operand has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:48,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:48,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:48,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:51,299 INFO L130 PetriNetUnfolder]: 3581/7151 cut-off events. [2023-08-30 07:11:51,300 INFO L131 PetriNetUnfolder]: For 589481/589481 co-relation queries the response was YES. [2023-08-30 07:11:51,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86763 conditions, 7151 events. 3581/7151 cut-off events. For 589481/589481 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 59631 event pairs, 289 based on Foata normal form. 264/7415 useless extension candidates. Maximal degree in co-relation 86667. Up to 5620 conditions per place. [2023-08-30 07:11:51,387 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 980 selfloop transitions, 249 changer transitions 29/1258 dead transitions. [2023-08-30 07:11:51,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1258 transitions, 37571 flow [2023-08-30 07:11:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 07:11:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 07:11:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2041 transitions. [2023-08-30 07:11:51,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262740183792815 [2023-08-30 07:11:51,390 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2041 transitions. [2023-08-30 07:11:51,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2041 transitions. [2023-08-30 07:11:51,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:51,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2041 transitions. [2023-08-30 07:11:51,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 72.89285714285714) internal successors, (2041), 28 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:51,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 171.0) internal successors, (4959), 29 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:51,398 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 171.0) internal successors, (4959), 29 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:51,398 INFO L175 Difference]: Start difference. First operand has 340 places, 1043 transitions, 30535 flow. Second operand 28 states and 2041 transitions. [2023-08-30 07:11:51,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1258 transitions, 37571 flow [2023-08-30 07:11:54,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1258 transitions, 36901 flow, removed 283 selfloop flow, removed 14 redundant places. [2023-08-30 07:11:54,288 INFO L231 Difference]: Finished difference. Result has 363 places, 1125 transitions, 33378 flow [2023-08-30 07:11:54,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=29889, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=33378, PETRI_PLACES=363, PETRI_TRANSITIONS=1125} [2023-08-30 07:11:54,291 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 334 predicate places. [2023-08-30 07:11:54,291 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1125 transitions, 33378 flow [2023-08-30 07:11:54,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:54,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:54,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:54,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:54,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:54,497 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)] === [2023-08-30 07:11:54,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:54,498 INFO L85 PathProgramCache]: Analyzing trace with hash -592511761, now seen corresponding path program 19 times [2023-08-30 07:11:54,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:54,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838977949] [2023-08-30 07:11:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:54,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:54,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:54,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838977949] [2023-08-30 07:11:54,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838977949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:54,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044361043] [2023-08-30 07:11:54,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:11:54,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:54,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:54,633 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) [2023-08-30 07:11:54,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 07:11:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:11:54,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:54,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044361043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:54,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:54,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-30 07:11:54,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698066632] [2023-08-30 07:11:54,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:54,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:11:54,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:11:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-08-30 07:11:55,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:11:55,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1125 transitions, 33378 flow. Second operand has 22 states, 22 states have (on average 68.9090909090909) internal successors, (1516), 22 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:55,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:55,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:11:55,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:59,132 INFO L130 PetriNetUnfolder]: 3792/7583 cut-off events. [2023-08-30 07:11:59,132 INFO L131 PetriNetUnfolder]: For 653853/653853 co-relation queries the response was YES. [2023-08-30 07:11:59,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97901 conditions, 7583 events. 3792/7583 cut-off events. For 653853/653853 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 63808 event pairs, 97 based on Foata normal form. 38/7621 useless extension candidates. Maximal degree in co-relation 97795. Up to 2075 conditions per place. [2023-08-30 07:11:59,222 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 709 selfloop transitions, 594 changer transitions 9/1312 dead transitions. [2023-08-30 07:11:59,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1312 transitions, 40624 flow [2023-08-30 07:11:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 07:11:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 07:11:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2375 transitions. [2023-08-30 07:11:59,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2023-08-30 07:11:59,225 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2375 transitions. [2023-08-30 07:11:59,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2375 transitions. [2023-08-30 07:11:59,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:59,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2375 transitions. [2023-08-30 07:11:59,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 71.96969696969697) internal successors, (2375), 33 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:59,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:59,233 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:59,233 INFO L175 Difference]: Start difference. First operand has 363 places, 1125 transitions, 33378 flow. Second operand 33 states and 2375 transitions. [2023-08-30 07:11:59,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1312 transitions, 40624 flow [2023-08-30 07:12:02,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1312 transitions, 39806 flow, removed 364 selfloop flow, removed 12 redundant places. [2023-08-30 07:12:02,715 INFO L231 Difference]: Finished difference. Result has 394 places, 1216 transitions, 38119 flow [2023-08-30 07:12:02,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=32461, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38119, PETRI_PLACES=394, PETRI_TRANSITIONS=1216} [2023-08-30 07:12:02,717 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 365 predicate places. [2023-08-30 07:12:02,717 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1216 transitions, 38119 flow [2023-08-30 07:12:02,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.9090909090909) internal successors, (1516), 22 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:02,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:02,718 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:02,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:02,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 07:12:02,923 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)] === [2023-08-30 07:12:02,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1622501659, now seen corresponding path program 20 times [2023-08-30 07:12:02,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:02,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454442164] [2023-08-30 07:12:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:03,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:03,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454442164] [2023-08-30 07:12:03,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454442164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:03,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638913603] [2023-08-30 07:12:03,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:12:03,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:03,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:03,089 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) [2023-08-30 07:12:03,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 07:12:03,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:12:03,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:12:03,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:03,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:03,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638913603] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:03,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:03,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-30 07:12:03,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066826400] [2023-08-30 07:12:03,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:03,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:12:03,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:12:03,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:12:03,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:12:03,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1216 transitions, 38119 flow. Second operand has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:03,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:03,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:12:03,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:09,198 INFO L130 PetriNetUnfolder]: 4227/8543 cut-off events. [2023-08-30 07:12:09,199 INFO L131 PetriNetUnfolder]: For 975015/975015 co-relation queries the response was YES. [2023-08-30 07:12:09,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116999 conditions, 8543 events. 4227/8543 cut-off events. For 975015/975015 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 73778 event pairs, 195 based on Foata normal form. 140/8683 useless extension candidates. Maximal degree in co-relation 116883. Up to 2052 conditions per place. [2023-08-30 07:12:09,308 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 597 selfloop transitions, 935 changer transitions 76/1608 dead transitions. [2023-08-30 07:12:09,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1608 transitions, 51832 flow [2023-08-30 07:12:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 07:12:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 07:12:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2730 transitions. [2023-08-30 07:12:09,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431484115694642 [2023-08-30 07:12:09,313 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2730 transitions. [2023-08-30 07:12:09,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2730 transitions. [2023-08-30 07:12:09,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:09,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2730 transitions. [2023-08-30 07:12:09,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.78378378378379) internal successors, (2730), 37 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) [2023-08-30 07:12:09,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:09,322 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:09,322 INFO L175 Difference]: Start difference. First operand has 394 places, 1216 transitions, 38119 flow. Second operand 37 states and 2730 transitions. [2023-08-30 07:12:09,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1608 transitions, 51832 flow [2023-08-30 07:12:15,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1608 transitions, 49532 flow, removed 1086 selfloop flow, removed 12 redundant places. [2023-08-30 07:12:15,861 INFO L231 Difference]: Finished difference. Result has 437 places, 1335 transitions, 44602 flow [2023-08-30 07:12:15,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=36806, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=821, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=44602, PETRI_PLACES=437, PETRI_TRANSITIONS=1335} [2023-08-30 07:12:15,862 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 408 predicate places. [2023-08-30 07:12:15,863 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 1335 transitions, 44602 flow [2023-08-30 07:12:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:15,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:15,863 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:15,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:16,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 07:12:16,069 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)] === [2023-08-30 07:12:16,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash -140687941, now seen corresponding path program 21 times [2023-08-30 07:12:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:16,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296773372] [2023-08-30 07:12:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:16,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:16,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296773372] [2023-08-30 07:12:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296773372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882669886] [2023-08-30 07:12:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:12:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:16,239 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) [2023-08-30 07:12:16,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 07:12:16,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:12:16,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:12:16,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:16,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:16,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882669886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:16,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:16,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-30 07:12:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796061605] [2023-08-30 07:12:16,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:16,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 07:12:16,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 07:12:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-08-30 07:12:16,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:12:16,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1335 transitions, 44602 flow. Second operand has 26 states, 26 states have (on average 68.8076923076923) internal successors, (1789), 26 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:16,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:16,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:12:16,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:23,598 INFO L130 PetriNetUnfolder]: 5038/10178 cut-off events. [2023-08-30 07:12:23,598 INFO L131 PetriNetUnfolder]: For 1267455/1267455 co-relation queries the response was YES. [2023-08-30 07:12:23,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142979 conditions, 10178 events. 5038/10178 cut-off events. For 1267455/1267455 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 90629 event pairs, 299 based on Foata normal form. 276/10454 useless extension candidates. Maximal degree in co-relation 142844. Up to 3548 conditions per place. [2023-08-30 07:12:23,756 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 719 selfloop transitions, 1042 changer transitions 56/1817 dead transitions. [2023-08-30 07:12:23,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 1817 transitions, 62042 flow [2023-08-30 07:12:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 07:12:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 07:12:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2689 transitions. [2023-08-30 07:12:23,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250039513197408 [2023-08-30 07:12:23,759 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2689 transitions. [2023-08-30 07:12:23,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2689 transitions. [2023-08-30 07:12:23,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:23,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2689 transitions. [2023-08-30 07:12:23,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 72.67567567567568) internal successors, (2689), 37 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:23,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:23,768 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:23,768 INFO L175 Difference]: Start difference. First operand has 437 places, 1335 transitions, 44602 flow. Second operand 37 states and 2689 transitions. [2023-08-30 07:12:23,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 1817 transitions, 62042 flow [2023-08-30 07:12:33,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1817 transitions, 59615 flow, removed 658 selfloop flow, removed 12 redundant places. [2023-08-30 07:12:33,303 INFO L231 Difference]: Finished difference. Result has 471 places, 1587 transitions, 54764 flow [2023-08-30 07:12:33,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=42796, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=54764, PETRI_PLACES=471, PETRI_TRANSITIONS=1587} [2023-08-30 07:12:33,305 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 442 predicate places. [2023-08-30 07:12:33,306 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1587 transitions, 54764 flow [2023-08-30 07:12:33,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.8076923076923) internal successors, (1789), 26 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:33,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:33,306 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:33,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 07:12:33,508 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)] === [2023-08-30 07:12:33,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1138747277, now seen corresponding path program 22 times [2023-08-30 07:12:33,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:33,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322787393] [2023-08-30 07:12:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:33,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322787393] [2023-08-30 07:12:33,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322787393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235387055] [2023-08-30 07:12:33,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:12:33,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:33,672 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) [2023-08-30 07:12:33,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 07:12:33,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:12:33,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:33,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:12:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:33,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:34,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235387055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:34,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:34,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-30 07:12:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011035484] [2023-08-30 07:12:34,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:34,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:12:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:12:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:12:34,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:12:34,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1587 transitions, 54764 flow. Second operand has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:34,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:34,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:12:34,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:42,398 INFO L130 PetriNetUnfolder]: 5553/11278 cut-off events. [2023-08-30 07:12:42,398 INFO L131 PetriNetUnfolder]: For 1544536/1544536 co-relation queries the response was YES. [2023-08-30 07:12:42,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161095 conditions, 11278 events. 5553/11278 cut-off events. For 1544536/1544536 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 102166 event pairs, 529 based on Foata normal form. 336/11614 useless extension candidates. Maximal degree in co-relation 160951. Up to 8254 conditions per place. [2023-08-30 07:12:42,592 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 1391 selfloop transitions, 484 changer transitions 21/1896 dead transitions. [2023-08-30 07:12:42,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1896 transitions, 67630 flow [2023-08-30 07:12:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:12:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:12:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1748 transitions. [2023-08-30 07:12:42,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2023-08-30 07:12:42,594 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1748 transitions. [2023-08-30 07:12:42,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1748 transitions. [2023-08-30 07:12:42,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:42,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1748 transitions. [2023-08-30 07:12:42,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 72.83333333333333) internal successors, (1748), 24 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:42,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:42,600 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:42,601 INFO L175 Difference]: Start difference. First operand has 471 places, 1587 transitions, 54764 flow. Second operand 24 states and 1748 transitions. [2023-08-30 07:12:42,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1896 transitions, 67630 flow [2023-08-30 07:12:55,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1896 transitions, 66833 flow, removed 335 selfloop flow, removed 14 redundant places. [2023-08-30 07:12:55,829 INFO L231 Difference]: Finished difference. Result has 490 places, 1773 transitions, 62551 flow [2023-08-30 07:12:55,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=53900, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=62551, PETRI_PLACES=490, PETRI_TRANSITIONS=1773} [2023-08-30 07:12:55,832 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 461 predicate places. [2023-08-30 07:12:55,832 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1773 transitions, 62551 flow [2023-08-30 07:12:55,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:55,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:55,833 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:55,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:56,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:56,038 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)] === [2023-08-30 07:12:56,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:56,039 INFO L85 PathProgramCache]: Analyzing trace with hash 188047156, now seen corresponding path program 23 times [2023-08-30 07:12:56,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:56,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288856708] [2023-08-30 07:12:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:56,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:56,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:56,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288856708] [2023-08-30 07:12:56,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288856708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:56,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75305354] [2023-08-30 07:12:56,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:12:56,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:56,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:56,228 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) [2023-08-30 07:12:56,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 07:12:56,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:12:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:12:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:56,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:56,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75305354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:56,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:56,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-30 07:12:56,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159940530] [2023-08-30 07:12:56,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 07:12:56,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:56,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 07:12:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2023-08-30 07:12:56,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:12:56,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1773 transitions, 62551 flow. Second operand has 26 states, 26 states have (on average 68.92307692307692) internal successors, (1792), 26 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:56,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:56,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:12:56,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:08,250 INFO L130 PetriNetUnfolder]: 6742/13746 cut-off events. [2023-08-30 07:13:08,250 INFO L131 PetriNetUnfolder]: For 1789014/1789014 co-relation queries the response was YES. [2023-08-30 07:13:08,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203140 conditions, 13746 events. 6742/13746 cut-off events. For 1789014/1789014 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 128610 event pairs, 11 based on Foata normal form. 54/13800 useless extension candidates. Maximal degree in co-relation 202987. Up to 2783 conditions per place. [2023-08-30 07:13:08,515 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 532 selfloop transitions, 1959 changer transitions 143/2634 dead transitions. [2023-08-30 07:13:08,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 2634 transitions, 90594 flow [2023-08-30 07:13:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 07:13:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 07:13:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4084 transitions. [2023-08-30 07:13:08,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264828738512949 [2023-08-30 07:13:08,520 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4084 transitions. [2023-08-30 07:13:08,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4084 transitions. [2023-08-30 07:13:08,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:08,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4084 transitions. [2023-08-30 07:13:08,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 72.92857142857143) internal successors, (4084), 56 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:08,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 171.0) internal successors, (9747), 57 states have internal predecessors, (9747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:08,534 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 171.0) internal successors, (9747), 57 states have internal predecessors, (9747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:08,534 INFO L175 Difference]: Start difference. First operand has 490 places, 1773 transitions, 62551 flow. Second operand 56 states and 4084 transitions. [2023-08-30 07:13:08,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 2634 transitions, 90594 flow [2023-08-30 07:13:28,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 2634 transitions, 89834 flow, removed 351 selfloop flow, removed 9 redundant places. [2023-08-30 07:13:28,615 INFO L231 Difference]: Finished difference. Result has 546 places, 2146 transitions, 82271 flow [2023-08-30 07:13:28,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=61920, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=82271, PETRI_PLACES=546, PETRI_TRANSITIONS=2146} [2023-08-30 07:13:28,617 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 517 predicate places. [2023-08-30 07:13:28,617 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 2146 transitions, 82271 flow [2023-08-30 07:13:28,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.92307692307692) internal successors, (1792), 26 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:28,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:28,617 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:28,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:28,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:28,818 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)] === [2023-08-30 07:13:28,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:28,818 INFO L85 PathProgramCache]: Analyzing trace with hash 509811766, now seen corresponding path program 24 times [2023-08-30 07:13:28,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:13:28,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111352969] [2023-08-30 07:13:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:13:28,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:13:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:13:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111352969] [2023-08-30 07:13:28,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111352969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:13:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964200776] [2023-08-30 07:13:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:13:28,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:28,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:13:28,976 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) [2023-08-30 07:13:28,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 07:13:29,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:13:29,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:13:29,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:13:29,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:29,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:13:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:29,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964200776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:13:29,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:13:29,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 12 [2023-08-30 07:13:29,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439762727] [2023-08-30 07:13:29,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:13:29,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:13:29,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:13:29,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:13:29,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:13:29,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 171 [2023-08-30 07:13:29,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 2146 transitions, 82271 flow. Second operand has 14 states, 14 states have (on average 73.85714285714286) internal successors, (1034), 14 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:29,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:29,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 171 [2023-08-30 07:13:29,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:48,444 INFO L130 PetriNetUnfolder]: 9240/18698 cut-off events. [2023-08-30 07:13:48,444 INFO L131 PetriNetUnfolder]: For 2377307/2377307 co-relation queries the response was YES. [2023-08-30 07:13:49,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288147 conditions, 18698 events. 9240/18698 cut-off events. For 2377307/2377307 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 181618 event pairs, 614 based on Foata normal form. 2/18697 useless extension candidates. Maximal degree in co-relation 287983. Up to 6914 conditions per place. [2023-08-30 07:13:49,234 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 1434 selfloop transitions, 1692 changer transitions 105/3234 dead transitions. [2023-08-30 07:13:49,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 3234 transitions, 125914 flow [2023-08-30 07:13:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:13:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:13:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 645 transitions. [2023-08-30 07:13:49,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47149122807017546 [2023-08-30 07:13:49,235 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 645 transitions. [2023-08-30 07:13:49,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 645 transitions. [2023-08-30 07:13:49,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:49,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 645 transitions. [2023-08-30 07:13:49,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.625) internal successors, (645), 8 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:49,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:49,237 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:49,237 INFO L175 Difference]: Start difference. First operand has 546 places, 2146 transitions, 82271 flow. Second operand 8 states and 645 transitions. [2023-08-30 07:13:49,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 3234 transitions, 125914 flow [2023-08-30 07:14:34,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 3234 transitions, 119678 flow, removed 2991 selfloop flow, removed 15 redundant places. [2023-08-30 07:14:35,005 INFO L231 Difference]: Finished difference. Result has 543 places, 2878 transitions, 113416 flow [2023-08-30 07:14:35,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=78387, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=113416, PETRI_PLACES=543, PETRI_TRANSITIONS=2878} [2023-08-30 07:14:35,008 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 514 predicate places. [2023-08-30 07:14:35,008 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 2878 transitions, 113416 flow [2023-08-30 07:14:35,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.85714285714286) internal successors, (1034), 14 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:35,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:14:35,009 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:14:35,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 07:14:35,214 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,SelfDestructingSolverStorable31 [2023-08-30 07:14:35,215 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)] === [2023-08-30 07:14:35,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:14:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1833610942, now seen corresponding path program 25 times [2023-08-30 07:14:35,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:14:35,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89287608] [2023-08-30 07:14:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:14:35,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:14:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:14:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:14:35,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:14:35,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89287608] [2023-08-30 07:14:35,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89287608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:14:35,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309583233] [2023-08-30 07:14:35,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:14:35,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:14:35,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:14:35,394 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) [2023-08-30 07:14:35,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 07:14:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:14:35,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:14:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:14:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:14:35,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:14:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:14:35,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309583233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:14:35,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:14:35,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 07:14:35,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91179915] [2023-08-30 07:14:35,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:14:35,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 07:14:35,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:14:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 07:14:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-08-30 07:14:36,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:14:36,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 2878 transitions, 113416 flow. Second operand has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:36,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:14:36,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:14:36,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:01,883 INFO L130 PetriNetUnfolder]: 9958/20158 cut-off events. [2023-08-30 07:15:01,884 INFO L131 PetriNetUnfolder]: For 1534322/1534322 co-relation queries the response was YES. [2023-08-30 07:15:02,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287433 conditions, 20158 events. 9958/20158 cut-off events. For 1534322/1534322 co-relation queries the response was YES. Maximal size of possible extension queue 1527. Compared 198048 event pairs, 245 based on Foata normal form. 104/20262 useless extension candidates. Maximal degree in co-relation 287268. Up to 6308 conditions per place. [2023-08-30 07:15:02,311 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 509 selfloop transitions, 2819 changer transitions 65/3393 dead transitions. [2023-08-30 07:15:02,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 3393 transitions, 134106 flow [2023-08-30 07:15:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 07:15:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 07:15:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2770 transitions. [2023-08-30 07:15:02,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262850107725454 [2023-08-30 07:15:02,315 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2770 transitions. [2023-08-30 07:15:02,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2770 transitions. [2023-08-30 07:15:02,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:02,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2770 transitions. [2023-08-30 07:15:02,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 72.89473684210526) internal successors, (2770), 38 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:02,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 171.0) internal successors, (6669), 39 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:02,324 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 171.0) internal successors, (6669), 39 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:02,324 INFO L175 Difference]: Start difference. First operand has 543 places, 2878 transitions, 113416 flow. Second operand 38 states and 2770 transitions. [2023-08-30 07:15:02,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 3393 transitions, 134106 flow [2023-08-30 07:15:40,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 3393 transitions, 132983 flow, removed 534 selfloop flow, removed 4 redundant places. [2023-08-30 07:15:40,843 INFO L231 Difference]: Finished difference. Result has 587 places, 3127 transitions, 129886 flow [2023-08-30 07:15:40,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=112398, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=129886, PETRI_PLACES=587, PETRI_TRANSITIONS=3127} [2023-08-30 07:15:40,846 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 558 predicate places. [2023-08-30 07:15:40,846 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 3127 transitions, 129886 flow [2023-08-30 07:15:40,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:40,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:40,847 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:15:40,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 07:15:41,047 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,SelfDestructingSolverStorable32 [2023-08-30 07:15:41,047 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)] === [2023-08-30 07:15:41,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:41,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1439251158, now seen corresponding path program 26 times [2023-08-30 07:15:41,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:15:41,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728996357] [2023-08-30 07:15:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:41,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:15:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:15:41,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:15:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728996357] [2023-08-30 07:15:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728996357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:15:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288405039] [2023-08-30 07:15:41,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:15:41,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:15:41,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:15:41,221 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) [2023-08-30 07:15:41,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 07:15:41,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:15:41,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:15:41,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:15:41,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:15:41,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:15:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:15:41,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288405039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:15:41,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:15:41,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 07:15:41,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601891021] [2023-08-30 07:15:41,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:15:41,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 07:15:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:15:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 07:15:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2023-08-30 07:15:41,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:15:41,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 3127 transitions, 129886 flow. Second operand has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:41,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:41,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:15:41,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:13,980 INFO L130 PetriNetUnfolder]: 10318/20836 cut-off events. [2023-08-30 07:16:13,981 INFO L131 PetriNetUnfolder]: For 1774133/1774133 co-relation queries the response was YES. [2023-08-30 07:16:14,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307647 conditions, 20836 events. 10318/20836 cut-off events. For 1774133/1774133 co-relation queries the response was YES. Maximal size of possible extension queue 1601. Compared 205597 event pairs, 245 based on Foata normal form. 140/20976 useless extension candidates. Maximal degree in co-relation 307472. Up to 5606 conditions per place. [2023-08-30 07:16:14,436 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 519 selfloop transitions, 2942 changer transitions 78/3539 dead transitions. [2023-08-30 07:16:14,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 3539 transitions, 147554 flow [2023-08-30 07:16:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 07:16:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 07:16:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3058 transitions. [2023-08-30 07:16:14,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42578668894458366 [2023-08-30 07:16:14,438 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3058 transitions. [2023-08-30 07:16:14,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3058 transitions. [2023-08-30 07:16:14,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:14,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3058 transitions. [2023-08-30 07:16:14,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 72.80952380952381) internal successors, (3058), 42 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:14,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:14,447 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:14,447 INFO L175 Difference]: Start difference. First operand has 587 places, 3127 transitions, 129886 flow. Second operand 42 states and 3058 transitions. [2023-08-30 07:16:14,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 3539 transitions, 147554 flow [2023-08-30 07:16:57,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 3539 transitions, 146986 flow, removed 197 selfloop flow, removed 13 redundant places. [2023-08-30 07:16:57,289 INFO L231 Difference]: Finished difference. Result has 622 places, 3246 transitions, 140773 flow [2023-08-30 07:16:57,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=129346, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=140773, PETRI_PLACES=622, PETRI_TRANSITIONS=3246} [2023-08-30 07:16:57,292 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 593 predicate places. [2023-08-30 07:16:57,292 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 3246 transitions, 140773 flow [2023-08-30 07:16:57,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:57,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:57,293 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:57,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 07:16:57,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:16:57,496 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)] === [2023-08-30 07:16:57,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:57,497 INFO L85 PathProgramCache]: Analyzing trace with hash -858364034, now seen corresponding path program 27 times [2023-08-30 07:16:57,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:16:57,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049195971] [2023-08-30 07:16:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:57,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:16:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:57,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:16:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049195971] [2023-08-30 07:16:57,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049195971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:16:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750733118] [2023-08-30 07:16:57,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:16:57,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:16:57,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:16:57,657 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) [2023-08-30 07:16:57,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 07:16:57,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 07:16:57,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:57,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:16:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:57,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:57,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750733118] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:57,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:16:57,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 07:16:57,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84386201] [2023-08-30 07:16:57,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:57,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 07:16:57,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:16:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 07:16:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2023-08-30 07:16:58,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:16:58,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 3246 transitions, 140773 flow. Second operand has 27 states, 27 states have (on average 68.74074074074075) internal successors, (1856), 27 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:58,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:58,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:16:58,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:37,950 INFO L130 PetriNetUnfolder]: 11707/23649 cut-off events. [2023-08-30 07:17:37,950 INFO L131 PetriNetUnfolder]: For 2117157/2117157 co-relation queries the response was YES. [2023-08-30 07:17:38,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360974 conditions, 23649 events. 11707/23649 cut-off events. For 2117157/2117157 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 237517 event pairs, 299 based on Foata normal form. 58/23707 useless extension candidates. Maximal degree in co-relation 360792. Up to 4804 conditions per place. [2023-08-30 07:17:39,041 INFO L137 encePairwiseOnDemand]: 162/171 looper letters, 401 selfloop transitions, 3627 changer transitions 145/4173 dead transitions. [2023-08-30 07:17:39,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 4173 transitions, 176425 flow [2023-08-30 07:17:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-08-30 07:17:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-08-30 07:17:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 8826 transitions. [2023-08-30 07:17:39,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41624221844934917 [2023-08-30 07:17:39,050 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 8826 transitions. [2023-08-30 07:17:39,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 8826 transitions. [2023-08-30 07:17:39,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:39,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 8826 transitions. [2023-08-30 07:17:39,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 71.1774193548387) internal successors, (8826), 124 states have internal predecessors, (8826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 171.0) internal successors, (21375), 125 states have internal predecessors, (21375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,083 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 171.0) internal successors, (21375), 125 states have internal predecessors, (21375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,084 INFO L175 Difference]: Start difference. First operand has 622 places, 3246 transitions, 140773 flow. Second operand 124 states and 8826 transitions. [2023-08-30 07:17:39,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 4173 transitions, 176425 flow [2023-08-30 07:18:38,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 728 places, 4173 transitions, 175789 flow, removed 185 selfloop flow, removed 17 redundant places. [2023-08-30 07:18:38,553 INFO L231 Difference]: Finished difference. Result has 744 places, 3785 transitions, 172067 flow [2023-08-30 07:18:38,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=139798, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3080, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=172067, PETRI_PLACES=744, PETRI_TRANSITIONS=3785} [2023-08-30 07:18:38,556 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 715 predicate places. [2023-08-30 07:18:38,556 INFO L495 AbstractCegarLoop]: Abstraction has has 744 places, 3785 transitions, 172067 flow [2023-08-30 07:18:38,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.74074074074075) internal successors, (1856), 27 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:38,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:38,556 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:38,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-30 07:18:38,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:18:38,757 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)] === [2023-08-30 07:18:38,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:38,757 INFO L85 PathProgramCache]: Analyzing trace with hash 574148990, now seen corresponding path program 28 times [2023-08-30 07:18:38,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:18:38,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714865127] [2023-08-30 07:18:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:18:38,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:18:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:18:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:38,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:18:38,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714865127] [2023-08-30 07:18:38,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714865127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:18:38,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963528106] [2023-08-30 07:18:38,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:18:38,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:18:38,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:18:38,932 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) [2023-08-30 07:18:38,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 07:18:38,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:18:38,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:18:38,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:18:38,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:39,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:18:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963528106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:18:39,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:18:39,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-30 07:18:39,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067743155] [2023-08-30 07:18:39,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:18:39,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 07:18:39,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:18:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 07:18:39,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-08-30 07:18:39,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:18:39,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 3785 transitions, 172067 flow. Second operand has 25 states, 25 states have (on average 68.84) internal successors, (1721), 25 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:39,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:39,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:18:39,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:19:22,488 INFO L130 PetriNetUnfolder]: 12599/24874 cut-off events. [2023-08-30 07:19:22,488 INFO L131 PetriNetUnfolder]: For 2538421/2538421 co-relation queries the response was YES. [2023-08-30 07:19:23,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405304 conditions, 24874 events. 12599/24874 cut-off events. For 2538421/2538421 co-relation queries the response was YES. Maximal size of possible extension queue 1916. Compared 246555 event pairs, 735 based on Foata normal form. 326/25200 useless extension candidates. Maximal degree in co-relation 405106. Up to 13784 conditions per place. [2023-08-30 07:19:23,429 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 2397 selfloop transitions, 1997 changer transitions 19/4413 dead transitions. [2023-08-30 07:19:23,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 4413 transitions, 202831 flow [2023-08-30 07:19:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 07:19:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 07:19:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3540 transitions. [2023-08-30 07:19:23,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248478338703904 [2023-08-30 07:19:23,432 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3540 transitions. [2023-08-30 07:19:23,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3540 transitions. [2023-08-30 07:19:23,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:19:23,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3540 transitions. [2023-08-30 07:19:23,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 72.24489795918367) internal successors, (3540), 49 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:23,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 171.0) internal successors, (8550), 50 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:23,441 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 171.0) internal successors, (8550), 50 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:23,441 INFO L175 Difference]: Start difference. First operand has 744 places, 3785 transitions, 172067 flow. Second operand 49 states and 3540 transitions. [2023-08-30 07:19:23,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 4413 transitions, 202831 flow [2023-08-30 07:20:42,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 4413 transitions, 193395 flow, removed 1621 selfloop flow, removed 37 redundant places. [2023-08-30 07:20:42,328 INFO L231 Difference]: Finished difference. Result has 746 places, 4156 transitions, 186373 flow [2023-08-30 07:20:42,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=163436, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1903, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=186373, PETRI_PLACES=746, PETRI_TRANSITIONS=4156} [2023-08-30 07:20:42,332 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 717 predicate places. [2023-08-30 07:20:42,332 INFO L495 AbstractCegarLoop]: Abstraction has has 746 places, 4156 transitions, 186373 flow [2023-08-30 07:20:42,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 68.84) internal successors, (1721), 25 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:20:42,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:20:42,333 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:20:42,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 07:20:42,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:20:42,538 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)] === [2023-08-30 07:20:42,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:20:42,538 INFO L85 PathProgramCache]: Analyzing trace with hash 552436930, now seen corresponding path program 29 times [2023-08-30 07:20:42,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:20:42,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003384074] [2023-08-30 07:20:42,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:20:42,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:20:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:20:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:20:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:20:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003384074] [2023-08-30 07:20:42,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003384074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:20:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636620200] [2023-08-30 07:20:42,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:20:42,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:20:42,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:20:42,698 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:20:42,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 07:20:42,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:20:42,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:20:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:20:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:20:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:20:42,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:20:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:20:43,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636620200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:20:43,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:20:43,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-30 07:20:43,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040340915] [2023-08-30 07:20:43,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:20:43,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 07:20:43,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:20:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 07:20:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-08-30 07:20:43,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:20:43,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 4156 transitions, 186373 flow. Second operand has 28 states, 28 states have (on average 68.92857142857143) internal successors, (1930), 28 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:20:43,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:20:43,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:20:43,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:21:39,928 INFO L130 PetriNetUnfolder]: 13394/26381 cut-off events. [2023-08-30 07:21:39,928 INFO L131 PetriNetUnfolder]: For 2604260/2604260 co-relation queries the response was YES. [2023-08-30 07:21:40,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424189 conditions, 26381 events. 13394/26381 cut-off events. For 2604260/2604260 co-relation queries the response was YES. Maximal size of possible extension queue 2082. Compared 263526 event pairs, 269 based on Foata normal form. 162/26543 useless extension candidates. Maximal degree in co-relation 423988. Up to 7465 conditions per place. [2023-08-30 07:21:41,295 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 881 selfloop transitions, 3756 changer transitions 24/4661 dead transitions. [2023-08-30 07:21:41,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 4661 transitions, 213478 flow [2023-08-30 07:21:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 07:21:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 07:21:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2974 transitions. [2023-08-30 07:21:41,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42419055769505065 [2023-08-30 07:21:41,298 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2974 transitions. [2023-08-30 07:21:41,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2974 transitions. [2023-08-30 07:21:41,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:21:41,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2974 transitions. [2023-08-30 07:21:41,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 72.53658536585365) internal successors, (2974), 41 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:41,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:41,306 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:41,306 INFO L175 Difference]: Start difference. First operand has 746 places, 4156 transitions, 186373 flow. Second operand 41 states and 2974 transitions. [2023-08-30 07:21:41,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 4661 transitions, 213478 flow [2023-08-30 07:23:09,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 4661 transitions, 212095 flow, removed 242 selfloop flow, removed 33 redundant places. [2023-08-30 07:23:09,501 INFO L231 Difference]: Finished difference. Result has 764 places, 4445 transitions, 209446 flow [2023-08-30 07:23:09,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=185036, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=209446, PETRI_PLACES=764, PETRI_TRANSITIONS=4445} [2023-08-30 07:23:09,504 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 735 predicate places. [2023-08-30 07:23:09,504 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 4445 transitions, 209446 flow [2023-08-30 07:23:09,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 68.92857142857143) internal successors, (1930), 28 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:09,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:09,505 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:23:09,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:09,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 07:23:09,706 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)] === [2023-08-30 07:23:09,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2129741782, now seen corresponding path program 30 times [2023-08-30 07:23:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:23:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957150679] [2023-08-30 07:23:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:23:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:09,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:23:09,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957150679] [2023-08-30 07:23:09,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957150679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:23:09,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401081240] [2023-08-30 07:23:09,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:23:09,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:23:09,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:23:09,894 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:23:09,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 07:23:09,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:23:09,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:23:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:23:09,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:10,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:23:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:10,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401081240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:23:10,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:23:10,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 07:23:10,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639459975] [2023-08-30 07:23:10,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:23:10,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 07:23:10,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:23:10,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 07:23:10,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2023-08-30 07:23:10,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 07:23:10,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 4445 transitions, 209446 flow. Second operand has 29 states, 29 states have (on average 68.89655172413794) internal successors, (1998), 29 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:10,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:10,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 07:23:10,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:24:34,612 INFO L130 PetriNetUnfolder]: 16029/31401 cut-off events. [2023-08-30 07:24:34,612 INFO L131 PetriNetUnfolder]: For 3615009/3615009 co-relation queries the response was YES. [2023-08-30 07:24:35,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525037 conditions, 31401 events. 16029/31401 cut-off events. For 3615009/3615009 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 320211 event pairs, 311 based on Foata normal form. 496/31897 useless extension candidates. Maximal degree in co-relation 524827. Up to 10211 conditions per place. Killed by 15