./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:01:50,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:01:50,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:01:50,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:01:50,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:01:50,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:01:50,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:01:50,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:01:50,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:01:50,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:01:50,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:01:50,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:01:50,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:01:50,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:01:50,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:01:50,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:01:50,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:01:50,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:01:50,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:01:50,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:01:50,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:01:50,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:01:50,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:01:50,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:01:50,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:01:50,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:01:50,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:01:50,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:01:50,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:01:50,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:01:50,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:01:50,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:01:50,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:01:50,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:01:50,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:01:50,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:01:50,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:01:50,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:01:50,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:01:50,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:01:50,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:01:50,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:01:51,023 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:01:51,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:01:51,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:01:51,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:01:51,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:01:51,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:01:51,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:01:51,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:01:51,027 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:01:51,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:01:51,028 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:01:51,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:01:51,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:01:51,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:01:51,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:01:51,029 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:01:51,029 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:01:51,029 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:01:51,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:01:51,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:01:51,030 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:01:51,030 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:01:51,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:01:51,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:01:51,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:01:51,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:01:51,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:01:51,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:01:51,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:01:51,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:01:51,032 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:01:51,032 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:01:51,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:01:51,032 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:01:51,032 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:01:51,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:01:51,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:01:51,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:01:51,363 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:01:51,363 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:01:51,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-09-01 02:01:52,550 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:01:52,774 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:01:52,775 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-09-01 02:01:52,781 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f1d48069/b870210853a34982b2d25b6cacb2a3f2/FLAGdabefda7a [2023-09-01 02:01:52,798 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f1d48069/b870210853a34982b2d25b6cacb2a3f2 [2023-09-01 02:01:52,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:01:52,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:01:52,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:01:52,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:01:52,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:01:52,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:01:52" (1/1) ... [2023-09-01 02:01:52,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a1f4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:52, skipping insertion in model container [2023-09-01 02:01:52,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:01:52" (1/1) ... [2023-09-01 02:01:52,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:01:52,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:01:52,958 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/mult-comm.wvr.c[1910,1923] [2023-09-01 02:01:52,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:01:52,973 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:01:52,988 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/mult-comm.wvr.c[1910,1923] [2023-09-01 02:01:52,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:01:53,001 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:01:53,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53 WrapperNode [2023-09-01 02:01:53,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:01:53,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:01:53,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:01:53,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:01:53,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,029 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-09-01 02:01:53,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:01:53,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:01:53,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:01:53,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:01:53,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,048 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:01:53,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:01:53,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:01:53,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:01:53,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (1/1) ... [2023-09-01 02:01:53,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:01:53,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:53,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:01:53,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:01:53,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:01:53,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:01:53,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:01:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:01:53,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:01:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 02:01:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:01:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 02:01:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:01:53,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:01:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 02:01:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:01:53,148 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:01:53,219 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:01:53,220 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:01:53,380 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:01:53,386 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:01:53,387 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 02:01:53,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:01:53 BoogieIcfgContainer [2023-09-01 02:01:53,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:01:53,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:01:53,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:01:53,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:01:53,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:01:52" (1/3) ... [2023-09-01 02:01:53,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48780466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:01:53, skipping insertion in model container [2023-09-01 02:01:53,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:01:53" (2/3) ... [2023-09-01 02:01:53,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48780466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:01:53, skipping insertion in model container [2023-09-01 02:01:53,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:01:53" (3/3) ... [2023-09-01 02:01:53,396 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-09-01 02:01:53,410 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:01:53,410 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 02:01:53,410 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:01:53,515 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 02:01:53,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 89 transitions, 194 flow [2023-09-01 02:01:53,633 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2023-09-01 02:01:53,636 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:01:53,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 5/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-09-01 02:01:53,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 89 transitions, 194 flow [2023-09-01 02:01:53,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 83 transitions, 178 flow [2023-09-01 02:01:53,653 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:01:53,670 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 83 transitions, 178 flow [2023-09-01 02:01:53,676 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 83 transitions, 178 flow [2023-09-01 02:01:53,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 83 transitions, 178 flow [2023-09-01 02:01:53,708 INFO L130 PetriNetUnfolder]: 5/83 cut-off events. [2023-09-01 02:01:53,708 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:01:53,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 83 events. 5/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-09-01 02:01:53,711 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2023-09-01 02:01:56,074 INFO L134 LiptonReduction]: Checked pairs total: 693 [2023-09-01 02:01:56,074 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-09-01 02:01:56,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:01:56,092 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;@28663ec4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:01:56,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-09-01 02:01:56,094 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 02:01:56,094 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:01:56,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:56,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 02:01:56,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:01:56,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash 334, now seen corresponding path program 1 times [2023-09-01 02:01:56,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:56,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607075806] [2023-09-01 02:01:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:56,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:56,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607075806] [2023-09-01 02:01:56,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607075806] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:01:56,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:01:56,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 02:01:56,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170432956] [2023-09-01 02:01:56,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:01:56,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 02:01:56,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:56,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 02:01:56,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 02:01:56,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-09-01 02:01:56,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:56,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-09-01 02:01:56,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:56,294 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-09-01 02:01:56,294 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 02:01:56,295 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 516 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. [2023-09-01 02:01:56,299 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-09-01 02:01:56,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-09-01 02:01:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 02:01:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 02:01:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2023-09-01 02:01:56,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443786982248521 [2023-09-01 02:01:56,314 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2023-09-01 02:01:56,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2023-09-01 02:01:56,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:56,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2023-09-01 02:01:56,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,330 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,332 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 184 transitions. [2023-09-01 02:01:56,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-09-01 02:01:56,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 02:01:56,336 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-09-01 02:01:56,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, 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} [2023-09-01 02:01:56,341 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 02:01:56,341 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-09-01 02:01:56,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:56,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:01:56,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 02:01:56,343 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)] === [2023-09-01 02:01:56,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:56,350 INFO L85 PathProgramCache]: Analyzing trace with hash 327089, now seen corresponding path program 1 times [2023-09-01 02:01:56,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:56,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682539031] [2023-09-01 02:01:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:56,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:56,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:56,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682539031] [2023-09-01 02:01:56,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682539031] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:01:56,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:01:56,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:01:56,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290863093] [2023-09-01 02:01:56,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:01:56,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:01:56,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:56,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:01:56,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:01:56,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 169 [2023-09-01 02:01:56,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:56,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 169 [2023-09-01 02:01:56,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:56,612 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-09-01 02:01:56,612 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:01:56,612 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 452 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. [2023-09-01 02:01:56,613 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-09-01 02:01:56,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-09-01 02:01:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:01:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:01:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-09-01 02:01:56,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-09-01 02:01:56,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-09-01 02:01:56,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-09-01 02:01:56,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:56,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-09-01 02:01:56,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,620 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 247 transitions. [2023-09-01 02:01:56,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-09-01 02:01:56,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:01:56,621 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-09-01 02:01:56,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, 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} [2023-09-01 02:01:56,622 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 02:01:56,622 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-09-01 02:01:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:56,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:01:56,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 02:01:56,623 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)] === [2023-09-01 02:01:56,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash 327091, now seen corresponding path program 1 times [2023-09-01 02:01:56,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:56,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657609874] [2023-09-01 02:01:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657609874] [2023-09-01 02:01:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657609874] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:01:56,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:01:56,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:01:56,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118272893] [2023-09-01 02:01:56,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:01:56,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:01:56,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:56,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:01:56,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:01:56,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-09-01 02:01:56,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 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) [2023-09-01 02:01:56,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:56,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-09-01 02:01:56,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:56,745 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-09-01 02:01:56,745 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:01:56,746 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 397 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. [2023-09-01 02:01:56,748 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-09-01 02:01:56,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-09-01 02:01:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:01:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:01:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-09-01 02:01:56,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45956607495069035 [2023-09-01 02:01:56,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-09-01 02:01:56,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-09-01 02:01:56,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:56,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-09-01 02:01:56,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,757 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 233 transitions. [2023-09-01 02:01:56,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-09-01 02:01:56,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:01:56,758 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-09-01 02:01:56,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, 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} [2023-09-01 02:01:56,759 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 02:01:56,762 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-09-01 02:01:56,762 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) [2023-09-01 02:01:56,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:56,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:01:56,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 02:01:56,763 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)] === [2023-09-01 02:01:56,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:56,764 INFO L85 PathProgramCache]: Analyzing trace with hash 314340611, now seen corresponding path program 1 times [2023-09-01 02:01:56,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:56,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165492276] [2023-09-01 02:01:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:56,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:56,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165492276] [2023-09-01 02:01:56,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165492276] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:01:56,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:01:56,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:01:56,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139943977] [2023-09-01 02:01:56,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:01:56,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:01:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:01:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:01:56,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 169 [2023-09-01 02:01:56,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:56,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 169 [2023-09-01 02:01:56,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:56,962 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-09-01 02:01:56,963 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:01:56,963 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. [2023-09-01 02:01:56,964 INFO L137 encePairwiseOnDemand]: 167/169 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-09-01 02:01:56,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-09-01 02:01:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:01:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:01:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-09-01 02:01:56,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319526627218935 [2023-09-01 02:01:56,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-09-01 02:01:56,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-09-01 02:01:56,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:56,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-09-01 02:01:56,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-09-01 02:01:56,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,977 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 219 transitions. [2023-09-01 02:01:56,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-09-01 02:01:56,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:01:56,978 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-09-01 02:01:56,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, 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} [2023-09-01 02:01:56,980 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 02:01:56,980 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-09-01 02:01:56,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:56,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:56,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:01:56,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 02:01:56,981 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)] === [2023-09-01 02:01:56,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:56,982 INFO L85 PathProgramCache]: Analyzing trace with hash 314340612, now seen corresponding path program 1 times [2023-09-01 02:01:56,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:56,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448089941] [2023-09-01 02:01:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:56,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:57,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:57,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448089941] [2023-09-01 02:01:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448089941] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:01:57,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:01:57,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:01:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962600111] [2023-09-01 02:01:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:01:57,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:01:57,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:01:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:01:57,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 169 [2023-09-01 02:01:57,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:57,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 169 [2023-09-01 02:01:57,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:57,219 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-09-01 02:01:57,220 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:01:57,220 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 171 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. [2023-09-01 02:01:57,221 INFO L137 encePairwiseOnDemand]: 167/169 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-09-01 02:01:57,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-09-01 02:01:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:01:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:01:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-09-01 02:01:57,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46548323471400394 [2023-09-01 02:01:57,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-09-01 02:01:57,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-09-01 02:01:57,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:57,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-09-01 02:01:57,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,225 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 236 transitions. [2023-09-01 02:01:57,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-09-01 02:01:57,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:01:57,226 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-09-01 02:01:57,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, 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} [2023-09-01 02:01:57,227 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 02:01:57,227 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-09-01 02:01:57,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:57,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:57,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 02:01:57,228 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)] === [2023-09-01 02:01:57,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1496637301, now seen corresponding path program 1 times [2023-09-01 02:01:57,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:57,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175815550] [2023-09-01 02:01:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:57,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:57,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:57,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175815550] [2023-09-01 02:01:57,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175815550] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:01:57,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:01:57,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:01:57,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004713395] [2023-09-01 02:01:57,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:01:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:01:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:57,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:01:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:01:57,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 169 [2023-09-01 02:01:57,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:57,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 169 [2023-09-01 02:01:57,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:57,584 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2023-09-01 02:01:57,584 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:01:57,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 114 events. 65/114 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 318 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-09-01 02:01:57,587 INFO L137 encePairwiseOnDemand]: 165/169 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-09-01 02:01:57,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2023-09-01 02:01:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:01:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:01:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-09-01 02:01:57,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970414201183432 [2023-09-01 02:01:57,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-09-01 02:01:57,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-09-01 02:01:57,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:57,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-09-01 02:01:57,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,592 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 252 transitions. [2023-09-01 02:01:57,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2023-09-01 02:01:57,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:01:57,594 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 57 flow [2023-09-01 02:01:57,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-09-01 02:01:57,596 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-09-01 02:01:57,597 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 57 flow [2023-09-01 02:01:57,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:57,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:57,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:57,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 02:01:57,598 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)] === [2023-09-01 02:01:57,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash 527342246, now seen corresponding path program 1 times [2023-09-01 02:01:57,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:57,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542316280] [2023-09-01 02:01:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:57,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:57,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542316280] [2023-09-01 02:01:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542316280] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249695985] [2023-09-01 02:01:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:57,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:57,965 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) [2023-09-01 02:01:57,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 02:01:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:01:58,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:58,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:58,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249695985] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:58,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:58,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-09-01 02:01:58,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741776557] [2023-09-01 02:01:58,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:58,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:01:58,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:58,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:01:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:01:58,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-09-01 02:01:58,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 57 flow. Second operand has 9 states, 9 states have (on average 74.0) internal successors, (666), 9 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:58,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:58,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-09-01 02:01:58,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:58,737 INFO L130 PetriNetUnfolder]: 69/129 cut-off events. [2023-09-01 02:01:58,737 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 02:01:58,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 129 events. 69/129 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 377 event pairs, 3 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 318. Up to 79 conditions per place. [2023-09-01 02:01:58,739 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 23 selfloop transitions, 5 changer transitions 13/42 dead transitions. [2023-09-01 02:01:58,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 204 flow [2023-09-01 02:01:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:01:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:01:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 468 transitions. [2023-09-01 02:01:58,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-09-01 02:01:58,741 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 468 transitions. [2023-09-01 02:01:58,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 468 transitions. [2023-09-01 02:01:58,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:58,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 468 transitions. [2023-09-01 02:01:58,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:58,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:58,744 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:58,744 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 57 flow. Second operand 6 states and 468 transitions. [2023-09-01 02:01:58,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 204 flow [2023-09-01 02:01:58,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:01:58,746 INFO L231 Difference]: Finished difference. Result has 31 places, 19 transitions, 82 flow [2023-09-01 02:01:58,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=19} [2023-09-01 02:01:58,746 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-09-01 02:01:58,747 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 19 transitions, 82 flow [2023-09-01 02:01:58,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 74.0) internal successors, (666), 9 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:58,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:58,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:58,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:01:58,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:58,953 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)] === [2023-09-01 02:01:58,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash -75004339, now seen corresponding path program 1 times [2023-09-01 02:01:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:58,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021658374] [2023-09-01 02:01:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:58,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:59,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:59,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021658374] [2023-09-01 02:01:59,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021658374] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:59,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124905881] [2023-09-01 02:01:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:59,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:59,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:59,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:01:59,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 02:01:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:01:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:59,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:59,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124905881] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:59,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:59,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-09-01 02:01:59,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942462262] [2023-09-01 02:01:59,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:59,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:01:59,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:01:59,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:02:00,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:02:01,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-09-01 02:02:01,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 19 transitions, 82 flow. Second operand has 10 states, 10 states have (on average 74.3) internal successors, (743), 10 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:01,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-09-01 02:02:01,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:01,201 INFO L130 PetriNetUnfolder]: 59/112 cut-off events. [2023-09-01 02:02:01,201 INFO L131 PetriNetUnfolder]: For 53/60 co-relation queries the response was YES. [2023-09-01 02:02:01,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 112 events. 59/112 cut-off events. For 53/60 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 314 event pairs, 6 based on Foata normal form. 8/116 useless extension candidates. Maximal degree in co-relation 319. Up to 70 conditions per place. [2023-09-01 02:02:01,202 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 19 selfloop transitions, 6 changer transitions 13/40 dead transitions. [2023-09-01 02:02:01,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 220 flow [2023-09-01 02:02:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:02:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:02:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 464 transitions. [2023-09-01 02:02:01,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45759368836291914 [2023-09-01 02:02:01,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 464 transitions. [2023-09-01 02:02:01,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 464 transitions. [2023-09-01 02:02:01,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:01,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 464 transitions. [2023-09-01 02:02:01,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.33333333333333) internal successors, (464), 6 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,207 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,207 INFO L175 Difference]: Start difference. First operand has 31 places, 19 transitions, 82 flow. Second operand 6 states and 464 transitions. [2023-09-01 02:02:01,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 220 flow [2023-09-01 02:02:01,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 198 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 02:02:01,209 INFO L231 Difference]: Finished difference. Result has 34 places, 21 transitions, 98 flow [2023-09-01 02:02:01,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=68, 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=6, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=21} [2023-09-01 02:02:01,210 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-09-01 02:02:01,210 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 21 transitions, 98 flow [2023-09-01 02:02:01,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 74.3) internal successors, (743), 10 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:01,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:01,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:01,411 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,SelfDestructingSolverStorable7 [2023-09-01 02:02:01,411 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)] === [2023-09-01 02:02:01,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash 599970296, now seen corresponding path program 2 times [2023-09-01 02:02:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:01,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16540401] [2023-09-01 02:02:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:01,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:01,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16540401] [2023-09-01 02:02:01,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16540401] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:01,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718691567] [2023-09-01 02:02:01,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:02:01,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:01,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:01,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:02:01,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 02:02:01,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:02:01,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:02:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:02:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:01,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:02:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:02:01,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718691567] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:01,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:02:01,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2023-09-01 02:02:01,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090158955] [2023-09-01 02:02:01,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:02:01,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:02:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:02:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:02:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-09-01 02:02:01,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-09-01 02:02:01,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 73.6) internal successors, (368), 5 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:01,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-09-01 02:02:01,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:01,965 INFO L130 PetriNetUnfolder]: 59/108 cut-off events. [2023-09-01 02:02:01,965 INFO L131 PetriNetUnfolder]: For 45/49 co-relation queries the response was YES. [2023-09-01 02:02:01,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 108 events. 59/108 cut-off events. For 45/49 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 243 event pairs, 7 based on Foata normal form. 5/112 useless extension candidates. Maximal degree in co-relation 326. Up to 72 conditions per place. [2023-09-01 02:02:01,966 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 20 selfloop transitions, 10 changer transitions 4/36 dead transitions. [2023-09-01 02:02:01,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 212 flow [2023-09-01 02:02:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:02:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:02:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 387 transitions. [2023-09-01 02:02:01,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45798816568047335 [2023-09-01 02:02:01,975 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 387 transitions. [2023-09-01 02:02:01,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 387 transitions. [2023-09-01 02:02:01,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:01,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 387 transitions. [2023-09-01 02:02:01,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.4) internal successors, (387), 5 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,978 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,978 INFO L175 Difference]: Start difference. First operand has 34 places, 21 transitions, 98 flow. Second operand 5 states and 387 transitions. [2023-09-01 02:02:01,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 212 flow [2023-09-01 02:02:01,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 201 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 02:02:01,980 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 142 flow [2023-09-01 02:02:01,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-09-01 02:02:01,981 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-09-01 02:02:01,981 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 142 flow [2023-09-01 02:02:01,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.6) internal successors, (368), 5 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:01,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:01,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:01,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:02,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:02,187 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)] === [2023-09-01 02:02:02,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:02,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2140273285, now seen corresponding path program 2 times [2023-09-01 02:02:02,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:02,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120946345] [2023-09-01 02:02:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:02,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:02,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120946345] [2023-09-01 02:02:02,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120946345] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:02,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105531547] [2023-09-01 02:02:02,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:02:02,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:02,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:02,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:02:02,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 02:02:02,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:02:02,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:02:02,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:02:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:02,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:02:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:02,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105531547] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:02:02,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:02:02,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-09-01 02:02:02,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458348055] [2023-09-01 02:02:02,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:02:02,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:02:02,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:02:02,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:02:02,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:02:02,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-09-01 02:02:02,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 73.8) internal successors, (738), 10 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:02,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:02,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-09-01 02:02:02,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:04,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:02:06,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:02:06,383 INFO L130 PetriNetUnfolder]: 101/193 cut-off events. [2023-09-01 02:02:06,383 INFO L131 PetriNetUnfolder]: For 198/208 co-relation queries the response was YES. [2023-09-01 02:02:06,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 193 events. 101/193 cut-off events. For 198/208 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 632 event pairs, 8 based on Foata normal form. 11/198 useless extension candidates. Maximal degree in co-relation 665. Up to 106 conditions per place. [2023-09-01 02:02:06,384 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 40 selfloop transitions, 15 changer transitions 6/63 dead transitions. [2023-09-01 02:02:06,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 404 flow [2023-09-01 02:02:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:02:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:02:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 698 transitions. [2023-09-01 02:02:06,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589086127547666 [2023-09-01 02:02:06,387 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 698 transitions. [2023-09-01 02:02:06,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 698 transitions. [2023-09-01 02:02:06,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:06,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 698 transitions. [2023-09-01 02:02:06,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:06,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:06,392 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:06,392 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 142 flow. Second operand 9 states and 698 transitions. [2023-09-01 02:02:06,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 404 flow [2023-09-01 02:02:06,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 63 transitions, 390 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 02:02:06,395 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 226 flow [2023-09-01 02:02:06,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-09-01 02:02:06,395 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-09-01 02:02:06,395 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 226 flow [2023-09-01 02:02:06,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.8) internal successors, (738), 10 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:06,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:06,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:06,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:06,602 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)] === [2023-09-01 02:02:06,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash 222714814, now seen corresponding path program 3 times [2023-09-01 02:02:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:06,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88800156] [2023-09-01 02:02:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:06,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:06,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:06,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88800156] [2023-09-01 02:02:06,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88800156] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:06,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39161471] [2023-09-01 02:02:06,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:02:06,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:06,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:06,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:02:06,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 02:02:06,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:02:06,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:02:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:02:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:07,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:02:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:07,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39161471] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:02:07,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:02:07,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-09-01 02:02:07,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288181588] [2023-09-01 02:02:07,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:02:07,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:02:07,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:02:07,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:02:07,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:02:07,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-09-01 02:02:07,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 226 flow. Second operand has 10 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:07,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:07,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-09-01 02:02:07,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:07,514 INFO L130 PetriNetUnfolder]: 138/273 cut-off events. [2023-09-01 02:02:07,514 INFO L131 PetriNetUnfolder]: For 441/441 co-relation queries the response was YES. [2023-09-01 02:02:07,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 273 events. 138/273 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1049 event pairs, 28 based on Foata normal form. 3/269 useless extension candidates. Maximal degree in co-relation 1014. Up to 202 conditions per place. [2023-09-01 02:02:07,524 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 43 selfloop transitions, 15 changer transitions 12/72 dead transitions. [2023-09-01 02:02:07,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 530 flow [2023-09-01 02:02:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:02:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:02:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 698 transitions. [2023-09-01 02:02:07,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589086127547666 [2023-09-01 02:02:07,527 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 698 transitions. [2023-09-01 02:02:07,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 698 transitions. [2023-09-01 02:02:07,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:07,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 698 transitions. [2023-09-01 02:02:07,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:07,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:07,531 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:07,531 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 226 flow. Second operand 9 states and 698 transitions. [2023-09-01 02:02:07,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 530 flow [2023-09-01 02:02:07,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 483 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-09-01 02:02:07,535 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 305 flow [2023-09-01 02:02:07,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-09-01 02:02:07,535 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 24 predicate places. [2023-09-01 02:02:07,535 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 305 flow [2023-09-01 02:02:07,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:07,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:07,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:07,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:07,736 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,SelfDestructingSolverStorable10 [2023-09-01 02:02:07,736 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)] === [2023-09-01 02:02:07,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:07,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1292742541, now seen corresponding path program 3 times [2023-09-01 02:02:07,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:07,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8162303] [2023-09-01 02:02:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:07,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:07,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8162303] [2023-09-01 02:02:07,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8162303] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:07,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376550781] [2023-09-01 02:02:07,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:02:07,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:07,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:02:07,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 02:02:08,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:02:08,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:02:08,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:02:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:08,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:02:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:08,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376550781] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:08,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:02:08,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 6] total 12 [2023-09-01 02:02:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764551730] [2023-09-01 02:02:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:02:08,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:02:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:02:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:02:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-09-01 02:02:08,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 169 [2023-09-01 02:02:08,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 305 flow. Second operand has 6 states, 6 states have (on average 70.33333333333333) internal successors, (422), 6 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:08,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:08,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 169 [2023-09-01 02:02:08,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:08,728 INFO L130 PetriNetUnfolder]: 163/316 cut-off events. [2023-09-01 02:02:08,728 INFO L131 PetriNetUnfolder]: For 695/695 co-relation queries the response was YES. [2023-09-01 02:02:08,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 316 events. 163/316 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1200 event pairs, 49 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 1208. Up to 273 conditions per place. [2023-09-01 02:02:08,731 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 44 selfloop transitions, 10 changer transitions 2/56 dead transitions. [2023-09-01 02:02:08,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 484 flow [2023-09-01 02:02:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:02:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:02:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 372 transitions. [2023-09-01 02:02:08,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44023668639053254 [2023-09-01 02:02:08,733 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 372 transitions. [2023-09-01 02:02:08,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 372 transitions. [2023-09-01 02:02:08,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:08,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 372 transitions. [2023-09-01 02:02:08,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:08,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:08,736 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:08,736 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 305 flow. Second operand 5 states and 372 transitions. [2023-09-01 02:02:08,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 484 flow [2023-09-01 02:02:08,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 429 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-09-01 02:02:08,742 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 327 flow [2023-09-01 02:02:08,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-09-01 02:02:08,744 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-09-01 02:02:08,745 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 327 flow [2023-09-01 02:02:08,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.33333333333333) internal successors, (422), 6 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:08,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:08,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:08,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:08,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:08,949 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)] === [2023-09-01 02:02:08,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:08,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1282096742, now seen corresponding path program 1 times [2023-09-01 02:02:08,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:08,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166627147] [2023-09-01 02:02:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:09,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166627147] [2023-09-01 02:02:09,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166627147] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:09,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247495092] [2023-09-01 02:02:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:09,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:09,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:09,319 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:02:09,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 02:02:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 02:02:09,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:09,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:02:18,862 WARN L222 SmtUtils]: Spent 7.69s on a formula simplification. DAG size of input: 763 DAG size of output: 752 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 02:03:39,744 WARN L222 SmtUtils]: Spent 25.38s on a formula simplification. DAG size of input: 1367 DAG size of output: 1342 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 02:10:09,727 WARN L222 SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:10:22,609 WARN L839 $PredicateComparison]: unable to prove that (and (let ((.cse4 (div (+ c_~x_2~0 1) 4294967296)) (.cse2 (- c_~x_2~0))) (let ((.cse0 (+ c_~x_1~0 (* .cse4 8589934592) (* (div (+ .cse2 4294967295) 4294967296) 4294967296))) (.cse3 (div (+ .cse2 (- 1) c_~x_1~0) 4294967296)) (.cse5 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse1 (* (div (+ c_~x_1~0 (- 4294967295)) 4294967296) 4294967296))) (or (< .cse0 (+ 8589934592 .cse1 (* 4294967296 (div (+ (- c_~x_1~0) c_~x_2~0 4294967295 .cse1 (* (div (+ .cse2 4294967294) 4294967296) (- 4294967296))) 8589934592)))) (< (+ (* 4294967296 .cse3) c_~x_1~0 (* (div (+ c_~x_2~0 4294967295) 4294967296) 4294967296) (* .cse4 4294967296)) (+ c_~x_2~0 4294967297 .cse1 .cse5)) (< .cse0 (+ (* 4294967296 (div (+ c_~x_2~0 (* (- 4294967296) .cse3) .cse5 (- 4294967296)) 8589934592)) 8589934592 .cse1))))) (< (+ c_~x_2~0 (* (div (+ c_~x_1~0 1) 4294967296) 4294967296)) (+ c_~x_1~0 4294967297 (* (div (+ c_~x_2~0 (- 4294967295)) 4294967296) 4294967296)))) is different from false [2023-09-01 02:10:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:10:31,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247495092] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:10:31,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:10:31,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2023-09-01 02:10:31,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504731402] [2023-09-01 02:10:31,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:10:31,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 02:10:31,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:10:31,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 02:10:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=301, Unknown=2, NotChecked=36, Total=420 [2023-09-01 02:10:32,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 169 [2023-09-01 02:10:32,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 327 flow. Second operand has 21 states, 21 states have (on average 63.666666666666664) internal successors, (1337), 21 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:32,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:10:32,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 169 [2023-09-01 02:10:32,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:10:34,529 INFO L130 PetriNetUnfolder]: 274/539 cut-off events. [2023-09-01 02:10:34,530 INFO L131 PetriNetUnfolder]: For 1099/1099 co-relation queries the response was YES. [2023-09-01 02:10:34,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2025 conditions, 539 events. 274/539 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2617 event pairs, 5 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 2007. Up to 186 conditions per place. [2023-09-01 02:10:34,534 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 88 selfloop transitions, 60 changer transitions 43/191 dead transitions. [2023-09-01 02:10:34,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 191 transitions, 1358 flow [2023-09-01 02:10:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 02:10:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 02:10:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1894 transitions. [2023-09-01 02:10:34,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40025359256128484 [2023-09-01 02:10:34,545 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1894 transitions. [2023-09-01 02:10:34,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1894 transitions. [2023-09-01 02:10:34,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:10:34,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1894 transitions. [2023-09-01 02:10:34,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 67.64285714285714) internal successors, (1894), 28 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:34,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 169.0) internal successors, (4901), 29 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:34,563 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 169.0) internal successors, (4901), 29 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:34,563 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 327 flow. Second operand 28 states and 1894 transitions. [2023-09-01 02:10:34,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 191 transitions, 1358 flow [2023-09-01 02:10:34,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 191 transitions, 1326 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-09-01 02:10:34,579 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 776 flow [2023-09-01 02:10:34,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=776, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2023-09-01 02:10:34,580 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2023-09-01 02:10:34,581 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 776 flow [2023-09-01 02:10:34,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.666666666666664) internal successors, (1337), 21 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:34,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:10:34,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:10:34,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:10:34,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:10:34,788 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)] === [2023-09-01 02:10:34,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:10:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1703099676, now seen corresponding path program 2 times [2023-09-01 02:10:34,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:10:34,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228105537] [2023-09-01 02:10:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:10:34,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:10:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:10:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:10:35,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:10:35,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228105537] [2023-09-01 02:10:35,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228105537] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:10:35,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007974636] [2023-09-01 02:10:35,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:10:35,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:10:35,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:10:35,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:10:35,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 02:10:35,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:10:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:10:35,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 02:10:35,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:10:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:10:35,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:10:43,833 WARN L222 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 763 DAG size of output: 752 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 02:12:03,921 WARN L222 SmtUtils]: Spent 25.10s on a formula simplification. DAG size of input: 1367 DAG size of output: 1342 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15