./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 02:20:53,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:20:53,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:20:53,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:20:53,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:20:53,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:20:53,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:20:53,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:20:53,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:20:53,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:20:53,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:20:53,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:20:53,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:20:53,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:20:53,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:20:53,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:20:53,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:20:53,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:20:53,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:20:53,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:20:53,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:20:53,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:20:53,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:20:53,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:20:53,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:20:53,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:20:53,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:20:53,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:20:53,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:20:53,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:20:53,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:20:53,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:20:53,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:20:53,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:20:53,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:20:53,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:20:53,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:20:53,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:20:53,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:20:53,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:20:53,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:20:53,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:20:53,875 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:20:53,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:20:53,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:20:53,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:20:53,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:20:53,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:20:53,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:20:53,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:20:53,879 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:20:53,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:20:53,880 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:20:53,881 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:20:53,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:20:53,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:20:53,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:20:53,881 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:20:53,882 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:20:53,882 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:20:53,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:20:53,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:20:53,882 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:20:53,883 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:20:53,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:20:53,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:20:53,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:20:53,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:20:53,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:20:53,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:20:53,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:20:53,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:20:53,884 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:20:53,885 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:20:53,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:20:53,885 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:20:53,885 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:20:54,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:20:54,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:20:54,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:20:54,212 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:20:54,213 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:20:54,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-30 02:20:55,357 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:20:55,630 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:20:55,631 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-30 02:20:55,655 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57fd9a079/97479480f43949de9ff1366c2c4cdf65/FLAGe9495d817 [2023-08-30 02:20:55,672 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57fd9a079/97479480f43949de9ff1366c2c4cdf65 [2023-08-30 02:20:55,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:20:55,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:20:55,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:20:55,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:20:55,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:20:55,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:20:55" (1/1) ... [2023-08-30 02:20:55,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115e25ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:55, skipping insertion in model container [2023-08-30 02:20:55,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:20:55" (1/1) ... [2023-08-30 02:20:55,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:20:55,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:20:56,132 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2023-08-30 02:20:56,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:20:56,208 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:20:56,255 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2023-08-30 02:20:56,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:20:56,321 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:20:56,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56 WrapperNode [2023-08-30 02:20:56,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:20:56,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:20:56,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:20:56,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:20:56,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,368 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-08-30 02:20:56,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:20:56,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:20:56,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:20:56,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:20:56,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,430 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:20:56,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:20:56,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:20:56,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:20:56,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (1/1) ... [2023-08-30 02:20:56,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:20:56,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:56,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 02:20:56,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 02:20:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 02:20:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 02:20:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 02:20:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 02:20:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:20:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:20:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:20:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:20:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 02:20:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:20:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:20:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:20:56,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:20:56,516 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 02:20:56,633 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:20:56,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:20:56,993 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:20:57,000 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:20:57,001 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:20:57,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:20:57 BoogieIcfgContainer [2023-08-30 02:20:57,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:20:57,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:20:57,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:20:57,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:20:57,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:20:55" (1/3) ... [2023-08-30 02:20:57,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0f6a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:20:57, skipping insertion in model container [2023-08-30 02:20:57,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:56" (2/3) ... [2023-08-30 02:20:57,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0f6a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:20:57, skipping insertion in model container [2023-08-30 02:20:57,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:20:57" (3/3) ... [2023-08-30 02:20:57,014 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-08-30 02:20:57,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:20:57,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-30 02:20:57,031 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:20:57,152 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 02:20:57,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 167 transitions, 350 flow [2023-08-30 02:20:57,277 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-30 02:20:57,278 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:20:57,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 165 events. 10/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 412 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-30 02:20:57,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 167 transitions, 350 flow [2023-08-30 02:20:57,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 161 transitions, 334 flow [2023-08-30 02:20:57,296 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:20:57,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-30 02:20:57,323 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-30 02:20:57,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 161 transitions, 334 flow [2023-08-30 02:20:57,384 INFO L130 PetriNetUnfolder]: 10/161 cut-off events. [2023-08-30 02:20:57,385 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:20:57,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 10/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 411 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-30 02:20:57,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 7792 [2023-08-30 02:21:01,739 INFO L134 LiptonReduction]: Checked pairs total: 12544 [2023-08-30 02:21:01,740 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-30 02:21:01,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:21:01,769 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;@6c4988cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:21:01,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-30 02:21:01,774 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:21:01,774 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:21:01,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:01,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:21:01,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:01,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash 680, now seen corresponding path program 1 times [2023-08-30 02:21:01,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:01,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27980417] [2023-08-30 02:21:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:01,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:01,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27980417] [2023-08-30 02:21:01,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27980417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:01,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:01,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:21:01,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399355723] [2023-08-30 02:21:01,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:01,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:21:01,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:01,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:21:01,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:21:01,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 327 [2023-08-30 02:21:01,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:01,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:01,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 327 [2023-08-30 02:21:01,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:02,177 INFO L130 PetriNetUnfolder]: 1250/1969 cut-off events. [2023-08-30 02:21:02,178 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 02:21:02,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1969 events. 1250/1969 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9149 event pairs, 994 based on Foata normal form. 0/1091 useless extension candidates. Maximal degree in co-relation 3680. Up to 1922 conditions per place. [2023-08-30 02:21:02,190 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 42 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-08-30 02:21:02,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 184 flow [2023-08-30 02:21:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:21:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:21:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 356 transitions. [2023-08-30 02:21:02,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443425076452599 [2023-08-30 02:21:02,210 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 356 transitions. [2023-08-30 02:21:02,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 356 transitions. [2023-08-30 02:21:02,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:02,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 356 transitions. [2023-08-30 02:21:02,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 178.0) internal successors, (356), 2 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,228 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,230 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 356 transitions. [2023-08-30 02:21:02,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 184 flow [2023-08-30 02:21:02,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:21:02,235 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2023-08-30 02:21:02,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-30 02:21:02,240 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-30 02:21:02,240 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2023-08-30 02:21:02,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:02,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:21:02,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:21:02,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:02,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:02,242 INFO L85 PathProgramCache]: Analyzing trace with hash 671187, now seen corresponding path program 1 times [2023-08-30 02:21:02,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:02,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360764527] [2023-08-30 02:21:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:02,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:02,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360764527] [2023-08-30 02:21:02,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360764527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:02,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:02,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:21:02,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709064989] [2023-08-30 02:21:02,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:02,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:21:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:21:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:21:02,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-30 02:21:02,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:02,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-30 02:21:02,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:02,754 INFO L130 PetriNetUnfolder]: 1223/1917 cut-off events. [2023-08-30 02:21:02,754 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:21:02,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 1917 events. 1223/1917 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8798 event pairs, 972 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 3799. Up to 1869 conditions per place. [2023-08-30 02:21:02,764 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-30 02:21:02,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 168 flow [2023-08-30 02:21:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-30 02:21:02,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-30 02:21:02,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-30 02:21:02,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-30 02:21:02,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:02,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-30 02:21:02,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,774 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 495 transitions. [2023-08-30 02:21:02,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 168 flow [2023-08-30 02:21:02,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:21:02,776 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2023-08-30 02:21:02,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-30 02:21:02,777 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-30 02:21:02,778 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2023-08-30 02:21:02,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:02,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:21:02,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:21:02,779 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:02,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:02,779 INFO L85 PathProgramCache]: Analyzing trace with hash 671188, now seen corresponding path program 1 times [2023-08-30 02:21:02,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:02,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571659064] [2023-08-30 02:21:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:02,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:02,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571659064] [2023-08-30 02:21:02,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571659064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:02,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:02,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:21:02,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704844893] [2023-08-30 02:21:02,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:02,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:21:02,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:02,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:21:02,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:21:02,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-30 02:21:02,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:02,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:02,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-30 02:21:02,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:03,076 INFO L130 PetriNetUnfolder]: 1196/1865 cut-off events. [2023-08-30 02:21:03,076 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:21:03,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 1865 events. 1196/1865 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8455 event pairs, 950 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 3698. Up to 1818 conditions per place. [2023-08-30 02:21:03,089 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 02:21:03,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-30 02:21:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:03,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-30 02:21:03,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49031600407747195 [2023-08-30 02:21:03,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-30 02:21:03,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-30 02:21:03,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:03,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-30 02:21:03,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,096 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 481 transitions. [2023-08-30 02:21:03,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-30 02:21:03,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:21:03,098 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-30 02:21:03,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-30 02:21:03,100 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-30 02:21:03,100 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-30 02:21:03,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:03,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:21:03,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:21:03,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:03,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash 645028316, now seen corresponding path program 1 times [2023-08-30 02:21:03,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:03,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103905825] [2023-08-30 02:21:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:03,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:03,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:03,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103905825] [2023-08-30 02:21:03,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103905825] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:03,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:03,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:21:03,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753524871] [2023-08-30 02:21:03,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:03,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:21:03,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:21:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:21:03,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-30 02:21:03,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:03,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-30 02:21:03,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:03,454 INFO L130 PetriNetUnfolder]: 875/1390 cut-off events. [2023-08-30 02:21:03,454 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:21:03,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 1390 events. 875/1390 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6042 event pairs, 688 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 2759. Up to 1354 conditions per place. [2023-08-30 02:21:03,460 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-30 02:21:03,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-30 02:21:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-30 02:21:03,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943934760448522 [2023-08-30 02:21:03,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-30 02:21:03,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-30 02:21:03,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:03,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-30 02:21:03,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,468 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 485 transitions. [2023-08-30 02:21:03,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-30 02:21:03,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:21:03,469 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-30 02:21:03,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-30 02:21:03,470 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-30 02:21:03,470 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-30 02:21:03,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:03,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:21:03,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:21:03,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:03,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash 645028315, now seen corresponding path program 1 times [2023-08-30 02:21:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:03,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699589548] [2023-08-30 02:21:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:03,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:03,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699589548] [2023-08-30 02:21:03,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699589548] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:03,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:03,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:21:03,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88017366] [2023-08-30 02:21:03,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:03,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:21:03,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:21:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:21:03,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 327 [2023-08-30 02:21:03,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:03,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 327 [2023-08-30 02:21:03,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:03,691 INFO L130 PetriNetUnfolder]: 554/915 cut-off events. [2023-08-30 02:21:03,691 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:21:03,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 915 events. 554/915 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3804 event pairs, 426 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1820. Up to 890 conditions per place. [2023-08-30 02:21:03,695 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-30 02:21:03,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 156 flow [2023-08-30 02:21:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-30 02:21:03,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750254841997961 [2023-08-30 02:21:03,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-30 02:21:03,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-30 02:21:03,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:03,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-30 02:21:03,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,702 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 466 transitions. [2023-08-30 02:21:03,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 156 flow [2023-08-30 02:21:03,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:21:03,704 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2023-08-30 02:21:03,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-30 02:21:03,704 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-08-30 02:21:03,705 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2023-08-30 02:21:03,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:03,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:21:03,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:21:03,706 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:03,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137457, now seen corresponding path program 1 times [2023-08-30 02:21:03,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:03,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867850052] [2023-08-30 02:21:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:03,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:03,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867850052] [2023-08-30 02:21:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867850052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:03,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:03,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:21:03,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004154604] [2023-08-30 02:21:03,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:03,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:21:03,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:03,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:21:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:21:03,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 327 [2023-08-30 02:21:03,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:03,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:03,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 327 [2023-08-30 02:21:03,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:04,135 INFO L130 PetriNetUnfolder]: 630/1056 cut-off events. [2023-08-30 02:21:04,135 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:21:04,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 1056 events. 630/1056 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4962 event pairs, 114 based on Foata normal form. 0/776 useless extension candidates. Maximal degree in co-relation 2094. Up to 669 conditions per place. [2023-08-30 02:21:04,140 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 70 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-30 02:21:04,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 79 transitions, 326 flow [2023-08-30 02:21:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:21:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:21:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 818 transitions. [2023-08-30 02:21:04,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003058103975535 [2023-08-30 02:21:04,143 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 818 transitions. [2023-08-30 02:21:04,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 818 transitions. [2023-08-30 02:21:04,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:04,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 818 transitions. [2023-08-30 02:21:04,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,150 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,150 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 5 states and 818 transitions. [2023-08-30 02:21:04,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 79 transitions, 326 flow [2023-08-30 02:21:04,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 79 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:21:04,153 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 96 flow [2023-08-30 02:21:04,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-30 02:21:04,157 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-30 02:21:04,157 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 96 flow [2023-08-30 02:21:04,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:04,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:21:04,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:21:04,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:04,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:04,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137456, now seen corresponding path program 1 times [2023-08-30 02:21:04,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:04,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701652539] [2023-08-30 02:21:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:04,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:04,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:04,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701652539] [2023-08-30 02:21:04,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701652539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:04,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:04,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:21:04,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353150452] [2023-08-30 02:21:04,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:04,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:21:04,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:04,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:21:04,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:21:04,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-30 02:21:04,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:04,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-30 02:21:04,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:04,746 INFO L130 PetriNetUnfolder]: 570/959 cut-off events. [2023-08-30 02:21:04,747 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 02:21:04,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 959 events. 570/959 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3672 event pairs, 195 based on Foata normal form. 16/775 useless extension candidates. Maximal degree in co-relation 2014. Up to 754 conditions per place. [2023-08-30 02:21:04,751 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 62 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-08-30 02:21:04,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 293 flow [2023-08-30 02:21:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:21:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:21:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-08-30 02:21:04,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929663608562691 [2023-08-30 02:21:04,753 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-08-30 02:21:04,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-08-30 02:21:04,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:04,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-08-30 02:21:04,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,759 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,759 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 5 states and 806 transitions. [2023-08-30 02:21:04,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 293 flow [2023-08-30 02:21:04,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:21:04,761 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 122 flow [2023-08-30 02:21:04,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 02:21:04,762 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-30 02:21:04,762 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 122 flow [2023-08-30 02:21:04,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:04,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:04,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:21:04,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:04,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -161798454, now seen corresponding path program 1 times [2023-08-30 02:21:04,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:04,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762498777] [2023-08-30 02:21:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:04,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:04,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:04,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762498777] [2023-08-30 02:21:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762498777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:04,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:04,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:21:04,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553591292] [2023-08-30 02:21:04,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:04,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:21:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:21:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:21:04,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-30 02:21:04,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:04,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-30 02:21:04,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:04,934 INFO L130 PetriNetUnfolder]: 615/1052 cut-off events. [2023-08-30 02:21:04,935 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-30 02:21:04,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 1052 events. 615/1052 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4589 event pairs, 276 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 2380. Up to 922 conditions per place. [2023-08-30 02:21:04,940 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 55 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-30 02:21:04,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 283 flow [2023-08-30 02:21:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-30 02:21:04,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208970438328236 [2023-08-30 02:21:04,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-30 02:21:04,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-30 02:21:04,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:04,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-30 02:21:04,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,947 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 122 flow. Second operand 3 states and 511 transitions. [2023-08-30 02:21:04,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 283 flow [2023-08-30 02:21:04,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:21:04,951 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 133 flow [2023-08-30 02:21:04,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-30 02:21:04,954 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-08-30 02:21:04,954 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 133 flow [2023-08-30 02:21:04,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:04,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:04,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:04,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:21:04,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:04,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1200004358, now seen corresponding path program 1 times [2023-08-30 02:21:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:04,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791842962] [2023-08-30 02:21:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:04,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:04,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:04,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791842962] [2023-08-30 02:21:04,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791842962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:04,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:04,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:21:04,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889756704] [2023-08-30 02:21:04,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:04,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:21:04,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:04,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:21:05,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:21:05,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-30 02:21:05,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:05,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:05,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-30 02:21:05,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:05,142 INFO L130 PetriNetUnfolder]: 638/1077 cut-off events. [2023-08-30 02:21:05,143 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-08-30 02:21:05,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 1077 events. 638/1077 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4691 event pairs, 219 based on Foata normal form. 10/899 useless extension candidates. Maximal degree in co-relation 2637. Up to 861 conditions per place. [2023-08-30 02:21:05,148 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 58 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-30 02:21:05,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 302 flow [2023-08-30 02:21:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-30 02:21:05,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259938837920489 [2023-08-30 02:21:05,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-30 02:21:05,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-30 02:21:05,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:05,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-30 02:21:05,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:05,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:05,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:05,155 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 133 flow. Second operand 3 states and 516 transitions. [2023-08-30 02:21:05,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 302 flow [2023-08-30 02:21:05,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:21:05,158 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 141 flow [2023-08-30 02:21:05,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-30 02:21:05,159 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-08-30 02:21:05,159 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 141 flow [2023-08-30 02:21:05,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:05,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:05,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:05,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:21:05,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:05,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1183384702, now seen corresponding path program 1 times [2023-08-30 02:21:05,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:05,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681790057] [2023-08-30 02:21:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:05,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:05,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:05,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681790057] [2023-08-30 02:21:05,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681790057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:05,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708958215] [2023-08-30 02:21:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:05,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:05,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:05,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:21:05,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 02:21:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:05,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 02:21:05,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:21:05,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:21:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:21:05,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 02:21:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:05,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:06,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708958215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:06,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:21:06,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-30 02:21:06,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106700037] [2023-08-30 02:21:06,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:06,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 02:21:06,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:06,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 02:21:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-30 02:21:07,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-30 02:21:07,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 141 flow. Second operand has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:07,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:07,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-30 02:21:07,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:08,559 INFO L130 PetriNetUnfolder]: 1709/2796 cut-off events. [2023-08-30 02:21:08,560 INFO L131 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2023-08-30 02:21:08,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6989 conditions, 2796 events. 1709/2796 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 13219 event pairs, 169 based on Foata normal form. 66/2424 useless extension candidates. Maximal degree in co-relation 6980. Up to 1096 conditions per place. [2023-08-30 02:21:08,578 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 204 selfloop transitions, 22 changer transitions 0/226 dead transitions. [2023-08-30 02:21:08,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 226 transitions, 1075 flow [2023-08-30 02:21:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:21:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:21:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2166 transitions. [2023-08-30 02:21:08,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47313237221494103 [2023-08-30 02:21:08,583 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2166 transitions. [2023-08-30 02:21:08,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2166 transitions. [2023-08-30 02:21:08,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:08,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2166 transitions. [2023-08-30 02:21:08,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 154.71428571428572) internal successors, (2166), 14 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:08,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:08,597 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:08,597 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 141 flow. Second operand 14 states and 2166 transitions. [2023-08-30 02:21:08,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 226 transitions, 1075 flow [2023-08-30 02:21:08,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 226 transitions, 1072 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:21:08,605 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 308 flow [2023-08-30 02:21:08,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=308, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-30 02:21:08,606 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-30 02:21:08,606 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 308 flow [2023-08-30 02:21:08,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:08,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:08,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:08,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:08,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 02:21:08,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:08,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:08,815 INFO L85 PathProgramCache]: Analyzing trace with hash 705944842, now seen corresponding path program 1 times [2023-08-30 02:21:08,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:08,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948696787] [2023-08-30 02:21:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:08,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:08,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:08,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948696787] [2023-08-30 02:21:08,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948696787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:08,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:08,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:21:08,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342097088] [2023-08-30 02:21:08,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:08,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:21:08,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:21:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:21:08,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 327 [2023-08-30 02:21:08,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:08,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:08,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 327 [2023-08-30 02:21:08,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:09,036 INFO L130 PetriNetUnfolder]: 487/940 cut-off events. [2023-08-30 02:21:09,037 INFO L131 PetriNetUnfolder]: For 896/896 co-relation queries the response was YES. [2023-08-30 02:21:09,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 940 events. 487/940 cut-off events. For 896/896 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4019 event pairs, 73 based on Foata normal form. 42/912 useless extension candidates. Maximal degree in co-relation 2665. Up to 682 conditions per place. [2023-08-30 02:21:09,055 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 48 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2023-08-30 02:21:09,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 406 flow [2023-08-30 02:21:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-30 02:21:09,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056065239551478 [2023-08-30 02:21:09,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-30 02:21:09,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-30 02:21:09,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:09,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-30 02:21:09,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:09,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:09,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:09,062 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 308 flow. Second operand 3 states and 496 transitions. [2023-08-30 02:21:09,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 406 flow [2023-08-30 02:21:09,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 374 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 02:21:09,069 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 254 flow [2023-08-30 02:21:09,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-08-30 02:21:09,069 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-30 02:21:09,070 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 254 flow [2023-08-30 02:21:09,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:09,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:09,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:09,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:21:09,071 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:09,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash -190660559, now seen corresponding path program 1 times [2023-08-30 02:21:09,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:09,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159642749] [2023-08-30 02:21:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:09,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:09,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159642749] [2023-08-30 02:21:09,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159642749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:09,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:09,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-30 02:21:09,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806440466] [2023-08-30 02:21:09,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:09,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 02:21:09,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:09,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 02:21:09,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-30 02:21:10,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 327 [2023-08-30 02:21:10,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:10,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:10,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 327 [2023-08-30 02:21:10,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:10,850 INFO L130 PetriNetUnfolder]: 695/1286 cut-off events. [2023-08-30 02:21:10,850 INFO L131 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2023-08-30 02:21:10,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 1286 events. 695/1286 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5603 event pairs, 103 based on Foata normal form. 12/1272 useless extension candidates. Maximal degree in co-relation 3576. Up to 672 conditions per place. [2023-08-30 02:21:10,856 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 138 selfloop transitions, 17 changer transitions 0/155 dead transitions. [2023-08-30 02:21:10,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 155 transitions, 894 flow [2023-08-30 02:21:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 02:21:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 02:21:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1842 transitions. [2023-08-30 02:21:10,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43330980945659847 [2023-08-30 02:21:10,861 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1842 transitions. [2023-08-30 02:21:10,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1842 transitions. [2023-08-30 02:21:10,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:10,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1842 transitions. [2023-08-30 02:21:10,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 141.69230769230768) internal successors, (1842), 13 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:10,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:10,873 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:10,873 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 254 flow. Second operand 13 states and 1842 transitions. [2023-08-30 02:21:10,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 155 transitions, 894 flow [2023-08-30 02:21:10,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 155 transitions, 872 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 02:21:10,878 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 360 flow [2023-08-30 02:21:10,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=360, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-08-30 02:21:10,878 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2023-08-30 02:21:10,879 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 360 flow [2023-08-30 02:21:10,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:10,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:10,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:10,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:21:10,880 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:10,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash -891010450, now seen corresponding path program 1 times [2023-08-30 02:21:10,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:10,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936283216] [2023-08-30 02:21:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:10,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:10,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:10,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936283216] [2023-08-30 02:21:10,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936283216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:10,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:10,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:21:10,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528930752] [2023-08-30 02:21:10,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:10,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:21:10,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:21:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:21:11,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 327 [2023-08-30 02:21:11,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 360 flow. Second operand has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:11,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 327 [2023-08-30 02:21:11,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:11,464 INFO L130 PetriNetUnfolder]: 763/1464 cut-off events. [2023-08-30 02:21:11,464 INFO L131 PetriNetUnfolder]: For 1111/1111 co-relation queries the response was YES. [2023-08-30 02:21:11,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4428 conditions, 1464 events. 763/1464 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6962 event pairs, 81 based on Foata normal form. 0/1406 useless extension candidates. Maximal degree in co-relation 4405. Up to 656 conditions per place. [2023-08-30 02:21:11,472 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 77 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2023-08-30 02:21:11,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 743 flow [2023-08-30 02:21:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:21:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:21:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2023-08-30 02:21:11,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658511722731906 [2023-08-30 02:21:11,477 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2023-08-30 02:21:11,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2023-08-30 02:21:11,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:11,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2023-08-30 02:21:11,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.33333333333334) internal successors, (1371), 9 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,486 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,486 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 360 flow. Second operand 9 states and 1371 transitions. [2023-08-30 02:21:11,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 743 flow [2023-08-30 02:21:11,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 106 transitions, 727 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 02:21:11,493 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 482 flow [2023-08-30 02:21:11,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=482, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-08-30 02:21:11,493 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 37 predicate places. [2023-08-30 02:21:11,494 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 482 flow [2023-08-30 02:21:11,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:11,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:11,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:21:11,495 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:11,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash -72479684, now seen corresponding path program 1 times [2023-08-30 02:21:11,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:11,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933640866] [2023-08-30 02:21:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:11,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:21:11,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:11,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933640866] [2023-08-30 02:21:11,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933640866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:11,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:11,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:21:11,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446088771] [2023-08-30 02:21:11,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:11,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:21:11,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:21:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:21:11,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-30 02:21:11,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:11,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-30 02:21:11,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:11,775 INFO L130 PetriNetUnfolder]: 987/1898 cut-off events. [2023-08-30 02:21:11,775 INFO L131 PetriNetUnfolder]: For 2198/2202 co-relation queries the response was YES. [2023-08-30 02:21:11,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 1898 events. 987/1898 cut-off events. For 2198/2202 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9777 event pairs, 573 based on Foata normal form. 70/1886 useless extension candidates. Maximal degree in co-relation 6033. Up to 1351 conditions per place. [2023-08-30 02:21:11,787 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 110 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2023-08-30 02:21:11,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1007 flow [2023-08-30 02:21:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 02:21:11,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527013251783894 [2023-08-30 02:21:11,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 02:21:11,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 02:21:11,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:11,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 02:21:11,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,793 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 482 flow. Second operand 3 states and 517 transitions. [2023-08-30 02:21:11,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1007 flow [2023-08-30 02:21:11,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 925 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 02:21:11,805 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 449 flow [2023-08-30 02:21:11,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=449, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-08-30 02:21:11,806 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2023-08-30 02:21:11,806 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 449 flow [2023-08-30 02:21:11,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:11,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 02:21:11,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:21:11,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:11,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1459253539, now seen corresponding path program 1 times [2023-08-30 02:21:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:11,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96987662] [2023-08-30 02:21:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:11,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:11,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:11,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96987662] [2023-08-30 02:21:11,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96987662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:11,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247845883] [2023-08-30 02:21:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:11,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:11,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:11,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:21:11,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 02:21:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:12,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 02:21:12,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:12,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:12,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247845883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:12,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:21:12,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-30 02:21:12,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061634593] [2023-08-30 02:21:12,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:12,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:21:12,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:21:12,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:21:12,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-30 02:21:12,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 449 flow. Second operand has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:12,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:12,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-30 02:21:12,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:12,979 INFO L130 PetriNetUnfolder]: 2081/3874 cut-off events. [2023-08-30 02:21:12,979 INFO L131 PetriNetUnfolder]: For 3811/3811 co-relation queries the response was YES. [2023-08-30 02:21:12,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 3874 events. 2081/3874 cut-off events. For 3811/3811 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20117 event pairs, 473 based on Foata normal form. 96/3952 useless extension candidates. Maximal degree in co-relation 12489. Up to 989 conditions per place. [2023-08-30 02:21:13,006 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 226 selfloop transitions, 52 changer transitions 0/278 dead transitions. [2023-08-30 02:21:13,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 278 transitions, 2002 flow [2023-08-30 02:21:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 02:21:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 02:21:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2488 transitions. [2023-08-30 02:21:13,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47553516819571867 [2023-08-30 02:21:13,013 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2488 transitions. [2023-08-30 02:21:13,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2488 transitions. [2023-08-30 02:21:13,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:13,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2488 transitions. [2023-08-30 02:21:13,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 155.5) internal successors, (2488), 16 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:13,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:13,027 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:13,028 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 449 flow. Second operand 16 states and 2488 transitions. [2023-08-30 02:21:13,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 278 transitions, 2002 flow [2023-08-30 02:21:13,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 278 transitions, 1986 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:21:13,047 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 959 flow [2023-08-30 02:21:13,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=959, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2023-08-30 02:21:13,048 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 60 predicate places. [2023-08-30 02:21:13,048 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 959 flow [2023-08-30 02:21:13,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:13,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:13,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:13,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:13,259 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,SelfDestructingSolverStorable14 [2023-08-30 02:21:13,260 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:13,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:13,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1566742044, now seen corresponding path program 1 times [2023-08-30 02:21:13,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:13,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763289738] [2023-08-30 02:21:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:13,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:13,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763289738] [2023-08-30 02:21:13,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763289738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:13,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:13,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 02:21:13,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045709442] [2023-08-30 02:21:13,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:13,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 02:21:13,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 02:21:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 02:21:14,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-30 02:21:14,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 959 flow. Second operand has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:14,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:14,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-30 02:21:14,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:15,357 INFO L130 PetriNetUnfolder]: 2294/4458 cut-off events. [2023-08-30 02:21:15,358 INFO L131 PetriNetUnfolder]: For 9348/9348 co-relation queries the response was YES. [2023-08-30 02:21:15,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16303 conditions, 4458 events. 2294/4458 cut-off events. For 9348/9348 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 25662 event pairs, 748 based on Foata normal form. 18/4440 useless extension candidates. Maximal degree in co-relation 16266. Up to 3174 conditions per place. [2023-08-30 02:21:15,391 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 169 selfloop transitions, 14 changer transitions 0/199 dead transitions. [2023-08-30 02:21:15,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 199 transitions, 1773 flow [2023-08-30 02:21:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:21:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:21:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1326 transitions. [2023-08-30 02:21:15,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505606523955148 [2023-08-30 02:21:15,395 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1326 transitions. [2023-08-30 02:21:15,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1326 transitions. [2023-08-30 02:21:15,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:15,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1326 transitions. [2023-08-30 02:21:15,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.33333333333334) internal successors, (1326), 9 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:15,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:15,405 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:15,405 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 959 flow. Second operand 9 states and 1326 transitions. [2023-08-30 02:21:15,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 199 transitions, 1773 flow [2023-08-30 02:21:15,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 199 transitions, 1647 flow, removed 60 selfloop flow, removed 2 redundant places. [2023-08-30 02:21:15,450 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 980 flow [2023-08-30 02:21:15,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=980, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2023-08-30 02:21:15,451 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 70 predicate places. [2023-08-30 02:21:15,451 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 980 flow [2023-08-30 02:21:15,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:15,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:15,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:15,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:21:15,453 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:15,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:15,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1121809114, now seen corresponding path program 2 times [2023-08-30 02:21:15,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:15,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080509144] [2023-08-30 02:21:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:15,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:15,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:15,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080509144] [2023-08-30 02:21:15,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080509144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:15,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:15,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 02:21:15,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733914370] [2023-08-30 02:21:15,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:15,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 02:21:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:15,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 02:21:15,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-30 02:21:16,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-30 02:21:16,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 980 flow. Second operand has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:16,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:16,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-30 02:21:16,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:17,533 INFO L130 PetriNetUnfolder]: 2480/4820 cut-off events. [2023-08-30 02:21:17,534 INFO L131 PetriNetUnfolder]: For 8623/8623 co-relation queries the response was YES. [2023-08-30 02:21:17,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17221 conditions, 4820 events. 2480/4820 cut-off events. For 8623/8623 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 28362 event pairs, 718 based on Foata normal form. 12/4794 useless extension candidates. Maximal degree in co-relation 17181. Up to 2760 conditions per place. [2023-08-30 02:21:17,579 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 157 selfloop transitions, 24 changer transitions 0/197 dead transitions. [2023-08-30 02:21:17,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 197 transitions, 1702 flow [2023-08-30 02:21:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 02:21:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 02:21:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1596 transitions. [2023-08-30 02:21:17,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44370308590492075 [2023-08-30 02:21:17,584 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1596 transitions. [2023-08-30 02:21:17,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1596 transitions. [2023-08-30 02:21:17,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:17,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1596 transitions. [2023-08-30 02:21:17,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.0909090909091) internal successors, (1596), 11 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:17,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:17,593 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:17,593 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 980 flow. Second operand 11 states and 1596 transitions. [2023-08-30 02:21:17,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 197 transitions, 1702 flow [2023-08-30 02:21:17,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 197 transitions, 1676 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 02:21:17,705 INFO L231 Difference]: Finished difference. Result has 127 places, 133 transitions, 1116 flow [2023-08-30 02:21:17,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1116, PETRI_PLACES=127, PETRI_TRANSITIONS=133} [2023-08-30 02:21:17,706 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 79 predicate places. [2023-08-30 02:21:17,706 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 133 transitions, 1116 flow [2023-08-30 02:21:17,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:17,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:17,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:21:17,707 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:17,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:17,707 INFO L85 PathProgramCache]: Analyzing trace with hash 36144378, now seen corresponding path program 1 times [2023-08-30 02:21:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:17,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680923491] [2023-08-30 02:21:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:21:17,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:17,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680923491] [2023-08-30 02:21:17,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680923491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:17,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829544087] [2023-08-30 02:21:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:17,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:17,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:17,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:21:17,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 02:21:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:17,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:21:17,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:21:17,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:21:17,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829544087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:17,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:21:17,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 02:21:17,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152805499] [2023-08-30 02:21:17,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:17,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:21:17,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:17,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:21:17,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:21:17,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-30 02:21:17,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 133 transitions, 1116 flow. Second operand has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:17,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:17,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-30 02:21:17,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:19,285 INFO L130 PetriNetUnfolder]: 4522/9156 cut-off events. [2023-08-30 02:21:19,285 INFO L131 PetriNetUnfolder]: For 18790/18790 co-relation queries the response was YES. [2023-08-30 02:21:19,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33205 conditions, 9156 events. 4522/9156 cut-off events. For 18790/18790 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 64662 event pairs, 1602 based on Foata normal form. 1236/10338 useless extension candidates. Maximal degree in co-relation 33162. Up to 2382 conditions per place. [2023-08-30 02:21:19,347 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 403 selfloop transitions, 18 changer transitions 0/437 dead transitions. [2023-08-30 02:21:19,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 437 transitions, 4638 flow [2023-08-30 02:21:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:21:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:21:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1036 transitions. [2023-08-30 02:21:19,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528032619775739 [2023-08-30 02:21:19,350 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1036 transitions. [2023-08-30 02:21:19,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1036 transitions. [2023-08-30 02:21:19,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:19,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1036 transitions. [2023-08-30 02:21:19,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.66666666666666) internal successors, (1036), 6 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:19,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:19,355 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:19,355 INFO L175 Difference]: Start difference. First operand has 127 places, 133 transitions, 1116 flow. Second operand 6 states and 1036 transitions. [2023-08-30 02:21:19,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 437 transitions, 4638 flow [2023-08-30 02:21:19,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 437 transitions, 4548 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-30 02:21:19,443 INFO L231 Difference]: Finished difference. Result has 131 places, 142 transitions, 1237 flow [2023-08-30 02:21:19,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1237, PETRI_PLACES=131, PETRI_TRANSITIONS=142} [2023-08-30 02:21:19,444 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 83 predicate places. [2023-08-30 02:21:19,444 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 142 transitions, 1237 flow [2023-08-30 02:21:19,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:19,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:19,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:19,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 02:21:19,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 02:21:19,651 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:19,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:19,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1549751406, now seen corresponding path program 1 times [2023-08-30 02:21:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:19,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708239129] [2023-08-30 02:21:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:19,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 02:21:19,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:19,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708239129] [2023-08-30 02:21:19,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708239129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:19,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:19,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:21:19,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58586168] [2023-08-30 02:21:19,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:19,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:21:19,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:19,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:21:19,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:21:19,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-30 02:21:19,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 142 transitions, 1237 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:19,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:19,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-30 02:21:19,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:20,852 INFO L130 PetriNetUnfolder]: 4408/8841 cut-off events. [2023-08-30 02:21:20,852 INFO L131 PetriNetUnfolder]: For 24434/24434 co-relation queries the response was YES. [2023-08-30 02:21:20,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34965 conditions, 8841 events. 4408/8841 cut-off events. For 24434/24434 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 60323 event pairs, 2471 based on Foata normal form. 288/9075 useless extension candidates. Maximal degree in co-relation 34919. Up to 5923 conditions per place. [2023-08-30 02:21:20,932 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 125 selfloop transitions, 17 changer transitions 0/150 dead transitions. [2023-08-30 02:21:20,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 150 transitions, 1558 flow [2023-08-30 02:21:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-30 02:21:20,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127420998980632 [2023-08-30 02:21:20,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-30 02:21:20,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-30 02:21:20,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:20,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-30 02:21:20,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:20,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:20,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:20,938 INFO L175 Difference]: Start difference. First operand has 131 places, 142 transitions, 1237 flow. Second operand 3 states and 503 transitions. [2023-08-30 02:21:20,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 150 transitions, 1558 flow [2023-08-30 02:21:21,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 150 transitions, 1496 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-30 02:21:21,022 INFO L231 Difference]: Finished difference. Result has 129 places, 127 transitions, 1149 flow [2023-08-30 02:21:21,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1149, PETRI_PLACES=129, PETRI_TRANSITIONS=127} [2023-08-30 02:21:21,023 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 81 predicate places. [2023-08-30 02:21:21,023 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 127 transitions, 1149 flow [2023-08-30 02:21:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:21,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:21,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:21,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:21:21,024 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:21,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:21,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1400322095, now seen corresponding path program 1 times [2023-08-30 02:21:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:21,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511273181] [2023-08-30 02:21:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:21,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:21,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511273181] [2023-08-30 02:21:21,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511273181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:21,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085900552] [2023-08-30 02:21:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:21,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:21,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:21,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:21:21,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 02:21:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:21,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 02:21:21,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:21:21,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:21:21,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085900552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:21,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 02:21:21,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-30 02:21:21,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805139316] [2023-08-30 02:21:21,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:21,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:21:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:21:21,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 02:21:21,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 327 [2023-08-30 02:21:21,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 127 transitions, 1149 flow. Second operand has 6 states, 6 states have (on average 146.83333333333334) internal successors, (881), 6 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:21,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:21,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 327 [2023-08-30 02:21:21,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:22,370 INFO L130 PetriNetUnfolder]: 4023/7961 cut-off events. [2023-08-30 02:21:22,370 INFO L131 PetriNetUnfolder]: For 25246/25246 co-relation queries the response was YES. [2023-08-30 02:21:22,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31958 conditions, 7961 events. 4023/7961 cut-off events. For 25246/25246 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 51797 event pairs, 1253 based on Foata normal form. 66/8001 useless extension candidates. Maximal degree in co-relation 31913. Up to 4162 conditions per place. [2023-08-30 02:21:22,425 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 168 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2023-08-30 02:21:22,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 192 transitions, 1911 flow [2023-08-30 02:21:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:21:22,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:21:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 953 transitions. [2023-08-30 02:21:22,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857288481141692 [2023-08-30 02:21:22,427 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 953 transitions. [2023-08-30 02:21:22,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 953 transitions. [2023-08-30 02:21:22,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:22,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 953 transitions. [2023-08-30 02:21:22,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.83333333333334) internal successors, (953), 6 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:22,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:22,432 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:22,433 INFO L175 Difference]: Start difference. First operand has 129 places, 127 transitions, 1149 flow. Second operand 6 states and 953 transitions. [2023-08-30 02:21:22,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 192 transitions, 1911 flow [2023-08-30 02:21:22,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 1861 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 02:21:22,522 INFO L231 Difference]: Finished difference. Result has 133 places, 127 transitions, 1180 flow [2023-08-30 02:21:22,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1180, PETRI_PLACES=133, PETRI_TRANSITIONS=127} [2023-08-30 02:21:22,523 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 85 predicate places. [2023-08-30 02:21:22,523 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 127 transitions, 1180 flow [2023-08-30 02:21:22,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.83333333333334) internal successors, (881), 6 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:22,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:22,523 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:22,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:22,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:22,730 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:22,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1400323650, now seen corresponding path program 1 times [2023-08-30 02:21:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:22,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052877362] [2023-08-30 02:21:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:22,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:23,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:23,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052877362] [2023-08-30 02:21:23,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052877362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:23,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455676267] [2023-08-30 02:21:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:23,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:23,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:23,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:21:23,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 02:21:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:23,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 02:21:23,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:23,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:23,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:21:23,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-08-30 02:21:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:24,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455676267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:24,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:21:24,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-30 02:21:24,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873568285] [2023-08-30 02:21:24,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:24,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 02:21:24,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:24,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 02:21:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 02:21:26,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2023-08-30 02:21:26,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 127 transitions, 1180 flow. Second operand has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:26,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:26,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2023-08-30 02:21:26,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:30,052 INFO L130 PetriNetUnfolder]: 4563/8995 cut-off events. [2023-08-30 02:21:30,052 INFO L131 PetriNetUnfolder]: For 27869/27869 co-relation queries the response was YES. [2023-08-30 02:21:30,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36488 conditions, 8995 events. 4563/8995 cut-off events. For 27869/27869 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 60358 event pairs, 476 based on Foata normal form. 124/9083 useless extension candidates. Maximal degree in co-relation 36441. Up to 2686 conditions per place. [2023-08-30 02:21:30,116 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 228 selfloop transitions, 113 changer transitions 0/341 dead transitions. [2023-08-30 02:21:30,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 341 transitions, 3043 flow [2023-08-30 02:21:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 02:21:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 02:21:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4719 transitions. [2023-08-30 02:21:30,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41231979030144167 [2023-08-30 02:21:30,122 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4719 transitions. [2023-08-30 02:21:30,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4719 transitions. [2023-08-30 02:21:30,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:30,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4719 transitions. [2023-08-30 02:21:30,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 134.82857142857142) internal successors, (4719), 35 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:30,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:30,144 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:30,144 INFO L175 Difference]: Start difference. First operand has 133 places, 127 transitions, 1180 flow. Second operand 35 states and 4719 transitions. [2023-08-30 02:21:30,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 341 transitions, 3043 flow [2023-08-30 02:21:30,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 341 transitions, 3029 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-30 02:21:30,240 INFO L231 Difference]: Finished difference. Result has 167 places, 162 transitions, 1734 flow [2023-08-30 02:21:30,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1734, PETRI_PLACES=167, PETRI_TRANSITIONS=162} [2023-08-30 02:21:30,241 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 119 predicate places. [2023-08-30 02:21:30,241 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 162 transitions, 1734 flow [2023-08-30 02:21:30,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:30,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:30,243 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-08-30 02:21:30,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:30,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:30,448 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:30,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1366491074, now seen corresponding path program 2 times [2023-08-30 02:21:30,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:30,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721630606] [2023-08-30 02:21:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:30,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:31,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:31,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721630606] [2023-08-30 02:21:31,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721630606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:31,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782261302] [2023-08-30 02:21:31,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:21:31,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:31,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:31,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:21:31,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 02:21:31,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:21:31,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:21:31,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 02:21:31,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:21:31,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:21:31,607 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:21:31,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-30 02:21:31,630 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 02:21:31,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-30 02:21:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:32,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:32,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782261302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:32,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:21:32,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 40 [2023-08-30 02:21:32,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146193933] [2023-08-30 02:21:32,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:32,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 02:21:32,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:32,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 02:21:32,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 02:21:37,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-30 02:21:37,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 162 transitions, 1734 flow. Second operand has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:37,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:37,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-30 02:21:37,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:41,736 INFO L130 PetriNetUnfolder]: 6671/13151 cut-off events. [2023-08-30 02:21:41,737 INFO L131 PetriNetUnfolder]: For 48656/48656 co-relation queries the response was YES. [2023-08-30 02:21:41,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58206 conditions, 13151 events. 6671/13151 cut-off events. For 48656/48656 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 88741 event pairs, 1994 based on Foata normal form. 204/13287 useless extension candidates. Maximal degree in co-relation 58157. Up to 7320 conditions per place. [2023-08-30 02:21:41,934 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 430 selfloop transitions, 66 changer transitions 0/496 dead transitions. [2023-08-30 02:21:41,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 496 transitions, 5061 flow [2023-08-30 02:21:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 02:21:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 02:21:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4515 transitions. [2023-08-30 02:21:41,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44539804675939626 [2023-08-30 02:21:41,941 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4515 transitions. [2023-08-30 02:21:41,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4515 transitions. [2023-08-30 02:21:41,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:41,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4515 transitions. [2023-08-30 02:21:41,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 145.6451612903226) internal successors, (4515), 31 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:41,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:41,965 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:41,965 INFO L175 Difference]: Start difference. First operand has 167 places, 162 transitions, 1734 flow. Second operand 31 states and 4515 transitions. [2023-08-30 02:21:41,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 496 transitions, 5061 flow [2023-08-30 02:21:42,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 496 transitions, 4446 flow, removed 221 selfloop flow, removed 15 redundant places. [2023-08-30 02:21:42,279 INFO L231 Difference]: Finished difference. Result has 194 places, 209 transitions, 2092 flow [2023-08-30 02:21:42,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2092, PETRI_PLACES=194, PETRI_TRANSITIONS=209} [2023-08-30 02:21:42,280 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 146 predicate places. [2023-08-30 02:21:42,280 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 209 transitions, 2092 flow [2023-08-30 02:21:42,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:42,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:42,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:42,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:42,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:42,482 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:42,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1895523700, now seen corresponding path program 3 times [2023-08-30 02:21:42,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:42,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948121943] [2023-08-30 02:21:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:21:43,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948121943] [2023-08-30 02:21:43,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948121943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:43,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:43,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:21:43,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223975187] [2023-08-30 02:21:43,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:43,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:21:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:21:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:21:44,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-30 02:21:44,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 209 transitions, 2092 flow. Second operand has 15 states, 15 states have (on average 128.86666666666667) internal successors, (1933), 15 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:44,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:44,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-30 02:21:44,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:47,516 INFO L130 PetriNetUnfolder]: 8805/17698 cut-off events. [2023-08-30 02:21:47,516 INFO L131 PetriNetUnfolder]: For 54807/54829 co-relation queries the response was YES. [2023-08-30 02:21:47,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74247 conditions, 17698 events. 8805/17698 cut-off events. For 54807/54829 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 131752 event pairs, 1576 based on Foata normal form. 42/17499 useless extension candidates. Maximal degree in co-relation 74191. Up to 4381 conditions per place. [2023-08-30 02:21:47,772 INFO L137 encePairwiseOnDemand]: 308/327 looper letters, 212 selfloop transitions, 301 changer transitions 0/522 dead transitions. [2023-08-30 02:21:47,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 522 transitions, 5635 flow [2023-08-30 02:21:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 02:21:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 02:21:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4387 transitions. [2023-08-30 02:21:47,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065424891112964 [2023-08-30 02:21:47,777 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4387 transitions. [2023-08-30 02:21:47,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4387 transitions. [2023-08-30 02:21:47,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:47,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4387 transitions. [2023-08-30 02:21:47,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 132.93939393939394) internal successors, (4387), 33 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:47,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 327.0) internal successors, (11118), 34 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:47,792 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 327.0) internal successors, (11118), 34 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:47,793 INFO L175 Difference]: Start difference. First operand has 194 places, 209 transitions, 2092 flow. Second operand 33 states and 4387 transitions. [2023-08-30 02:21:47,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 522 transitions, 5635 flow [2023-08-30 02:21:48,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 522 transitions, 5393 flow, removed 89 selfloop flow, removed 11 redundant places. [2023-08-30 02:21:48,410 INFO L231 Difference]: Finished difference. Result has 222 places, 387 transitions, 4552 flow [2023-08-30 02:21:48,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4552, PETRI_PLACES=222, PETRI_TRANSITIONS=387} [2023-08-30 02:21:48,411 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 174 predicate places. [2023-08-30 02:21:48,411 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 387 transitions, 4552 flow [2023-08-30 02:21:48,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.86666666666667) internal successors, (1933), 15 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:48,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:48,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:48,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 02:21:48,411 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:48,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash 732416370, now seen corresponding path program 4 times [2023-08-30 02:21:48,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:48,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552936392] [2023-08-30 02:21:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:48,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:49,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:49,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552936392] [2023-08-30 02:21:49,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552936392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:49,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007349647] [2023-08-30 02:21:49,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 02:21:49,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:49,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:49,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:21:49,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 02:21:49,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 02:21:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:21:49,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 02:21:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:49,345 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:21:49,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-30 02:21:49,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-30 02:21:49,730 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 02:21:49,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2023-08-30 02:21:49,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2023-08-30 02:21:50,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 43 [2023-08-30 02:21:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:50,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:51,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:21:51,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 02:21:51,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:21:51,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-30 02:21:51,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 02:21:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:51,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007349647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:51,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:21:51,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-30 02:21:51,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057044473] [2023-08-30 02:21:51,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:51,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-30 02:21:51,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:51,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-30 02:21:51,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2268, Unknown=12, NotChecked=0, Total=2450 [2023-08-30 02:21:58,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-30 02:21:58,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 387 transitions, 4552 flow. Second operand has 50 states, 50 states have (on average 88.68) internal successors, (4434), 50 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:58,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:58,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-30 02:21:58,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:22:14,847 INFO L130 PetriNetUnfolder]: 9627/18985 cut-off events. [2023-08-30 02:22:14,847 INFO L131 PetriNetUnfolder]: For 67627/67627 co-relation queries the response was YES. [2023-08-30 02:22:14,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85363 conditions, 18985 events. 9627/18985 cut-off events. For 67627/67627 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 142030 event pairs, 1682 based on Foata normal form. 174/18861 useless extension candidates. Maximal degree in co-relation 85299. Up to 5781 conditions per place. [2023-08-30 02:22:15,020 INFO L137 encePairwiseOnDemand]: 305/327 looper letters, 571 selfloop transitions, 371 changer transitions 0/942 dead transitions. [2023-08-30 02:22:15,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 942 transitions, 10124 flow [2023-08-30 02:22:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-30 02:22:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-30 02:22:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6920 transitions. [2023-08-30 02:22:15,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28597404744193733 [2023-08-30 02:22:15,029 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6920 transitions. [2023-08-30 02:22:15,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6920 transitions. [2023-08-30 02:22:15,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:22:15,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6920 transitions. [2023-08-30 02:22:15,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 93.51351351351352) internal successors, (6920), 74 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:15,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 327.0) internal successors, (24525), 75 states have internal predecessors, (24525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:15,055 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 327.0) internal successors, (24525), 75 states have internal predecessors, (24525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:15,056 INFO L175 Difference]: Start difference. First operand has 222 places, 387 transitions, 4552 flow. Second operand 74 states and 6920 transitions. [2023-08-30 02:22:15,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 942 transitions, 10124 flow [2023-08-30 02:22:15,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 942 transitions, 9762 flow, removed 159 selfloop flow, removed 5 redundant places. [2023-08-30 02:22:15,762 INFO L231 Difference]: Finished difference. Result has 323 places, 560 transitions, 7368 flow [2023-08-30 02:22:15,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=7368, PETRI_PLACES=323, PETRI_TRANSITIONS=560} [2023-08-30 02:22:15,763 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 275 predicate places. [2023-08-30 02:22:15,763 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 560 transitions, 7368 flow [2023-08-30 02:22:15,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 88.68) internal successors, (4434), 50 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:15,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:22:15,764 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:22:15,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 02:22:15,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:22:15,971 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:22:15,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:22:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash -681156031, now seen corresponding path program 2 times [2023-08-30 02:22:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:22:15,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731075980] [2023-08-30 02:22:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:22:15,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:22:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:22:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:22:16,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:22:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731075980] [2023-08-30 02:22:16,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731075980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:22:16,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579146054] [2023-08-30 02:22:16,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:22:16,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:22:16,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:22:16,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:22:16,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 02:22:16,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:22:16,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:22:16,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 02:22:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:22:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:22:16,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:22:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:22:16,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579146054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:22:16,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:22:16,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-08-30 02:22:16,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645722783] [2023-08-30 02:22:16,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:22:16,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:22:16,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:22:16,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:22:16,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:22:16,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 327 [2023-08-30 02:22:16,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 560 transitions, 7368 flow. Second operand has 16 states, 16 states have (on average 142.9375) internal successors, (2287), 16 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:16,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:22:16,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 327 [2023-08-30 02:22:16,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:22:21,597 INFO L130 PetriNetUnfolder]: 10307/20387 cut-off events. [2023-08-30 02:22:21,597 INFO L131 PetriNetUnfolder]: For 94359/94359 co-relation queries the response was YES. [2023-08-30 02:22:21,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100823 conditions, 20387 events. 10307/20387 cut-off events. For 94359/94359 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 155295 event pairs, 2939 based on Foata normal form. 158/20219 useless extension candidates. Maximal degree in co-relation 100727. Up to 5467 conditions per place. [2023-08-30 02:22:21,885 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 483 selfloop transitions, 315 changer transitions 0/798 dead transitions. [2023-08-30 02:22:21,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 798 transitions, 11456 flow [2023-08-30 02:22:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 02:22:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 02:22:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2536 transitions. [2023-08-30 02:22:21,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45619715776218744 [2023-08-30 02:22:21,888 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2536 transitions. [2023-08-30 02:22:21,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2536 transitions. [2023-08-30 02:22:21,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:22:21,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2536 transitions. [2023-08-30 02:22:21,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 149.1764705882353) internal successors, (2536), 17 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:21,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 327.0) internal successors, (5886), 18 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:21,894 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 327.0) internal successors, (5886), 18 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:21,894 INFO L175 Difference]: Start difference. First operand has 323 places, 560 transitions, 7368 flow. Second operand 17 states and 2536 transitions. [2023-08-30 02:22:21,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 798 transitions, 11456 flow [2023-08-30 02:22:22,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 798 transitions, 10269 flow, removed 367 selfloop flow, removed 17 redundant places. [2023-08-30 02:22:22,841 INFO L231 Difference]: Finished difference. Result has 320 places, 567 transitions, 7702 flow [2023-08-30 02:22:22,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=6017, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7702, PETRI_PLACES=320, PETRI_TRANSITIONS=567} [2023-08-30 02:22:22,842 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 272 predicate places. [2023-08-30 02:22:22,842 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 567 transitions, 7702 flow [2023-08-30 02:22:22,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 142.9375) internal successors, (2287), 16 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:22,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:22:22,843 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:22:22,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 02:22:23,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 02:22:23,043 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:22:23,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:22:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1752014428, now seen corresponding path program 2 times [2023-08-30 02:22:23,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:22:23,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336712327] [2023-08-30 02:22:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:22:23,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:22:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:22:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:22:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:22:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336712327] [2023-08-30 02:22:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336712327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:22:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092776354] [2023-08-30 02:22:23,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:22:23,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:22:23,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:22:23,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:22:23,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 02:22:23,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:22:23,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:22:23,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 02:22:23,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:22:23,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:22:23,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:22:23,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:22:23,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 02:22:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:22:24,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:22:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:22:24,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092776354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:22:24,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:22:24,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 39 [2023-08-30 02:22:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314610468] [2023-08-30 02:22:24,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:22:24,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 02:22:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:22:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 02:22:24,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 02:22:28,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-30 02:22:28,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 567 transitions, 7702 flow. Second operand has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:28,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:22:28,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-30 02:22:28,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:22:35,534 INFO L130 PetriNetUnfolder]: 12174/24096 cut-off events. [2023-08-30 02:22:35,534 INFO L131 PetriNetUnfolder]: For 99344/99344 co-relation queries the response was YES. [2023-08-30 02:22:35,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117101 conditions, 24096 events. 12174/24096 cut-off events. For 99344/99344 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 191141 event pairs, 3421 based on Foata normal form. 68/23885 useless extension candidates. Maximal degree in co-relation 117001. Up to 14966 conditions per place. [2023-08-30 02:22:35,916 INFO L137 encePairwiseOnDemand]: 313/327 looper letters, 764 selfloop transitions, 171 changer transitions 0/935 dead transitions. [2023-08-30 02:22:35,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 935 transitions, 13062 flow [2023-08-30 02:22:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 02:22:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 02:22:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3953 transitions. [2023-08-30 02:22:35,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685120742381104 [2023-08-30 02:22:35,922 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3953 transitions. [2023-08-30 02:22:35,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3953 transitions. [2023-08-30 02:22:35,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:22:35,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3953 transitions. [2023-08-30 02:22:35,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 136.31034482758622) internal successors, (3953), 29 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:35,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:35,934 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:35,934 INFO L175 Difference]: Start difference. First operand has 320 places, 567 transitions, 7702 flow. Second operand 29 states and 3953 transitions. [2023-08-30 02:22:35,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 935 transitions, 13062 flow [2023-08-30 02:22:36,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 935 transitions, 12780 flow, removed 63 selfloop flow, removed 5 redundant places. [2023-08-30 02:22:36,925 INFO L231 Difference]: Finished difference. Result has 357 places, 656 transitions, 9503 flow [2023-08-30 02:22:36,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9503, PETRI_PLACES=357, PETRI_TRANSITIONS=656} [2023-08-30 02:22:36,926 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 309 predicate places. [2023-08-30 02:22:36,926 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 656 transitions, 9503 flow [2023-08-30 02:22:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:36,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:22:36,927 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:22:36,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 02:22:37,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 02:22:37,128 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:22:37,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:22:37,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2002287342, now seen corresponding path program 2 times [2023-08-30 02:22:37,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:22:37,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246108688] [2023-08-30 02:22:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:22:37,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:22:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:22:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-30 02:22:37,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:22:37,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246108688] [2023-08-30 02:22:37,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246108688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:22:37,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120333985] [2023-08-30 02:22:37,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:22:37,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:22:37,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:22:37,185 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:22:37,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 02:22:37,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 02:22:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:22:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 02:22:37,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:22:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-30 02:22:37,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:22:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120333985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:22:37,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 02:22:37,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-30 02:22:37,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165259711] [2023-08-30 02:22:37,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:22:37,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:22:37,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:22:37,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:22:37,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:22:37,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 327 [2023-08-30 02:22:37,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 656 transitions, 9503 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:37,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:22:37,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 327 [2023-08-30 02:22:37,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:22:43,850 INFO L130 PetriNetUnfolder]: 11163/22902 cut-off events. [2023-08-30 02:22:43,850 INFO L131 PetriNetUnfolder]: For 108606/108682 co-relation queries the response was YES. [2023-08-30 02:22:44,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113985 conditions, 22902 events. 11163/22902 cut-off events. For 108606/108682 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 187351 event pairs, 9218 based on Foata normal form. 85/22758 useless extension candidates. Maximal degree in co-relation 113873. Up to 21811 conditions per place. [2023-08-30 02:22:44,256 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 535 selfloop transitions, 1 changer transitions 1/644 dead transitions. [2023-08-30 02:22:44,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 644 transitions, 10480 flow [2023-08-30 02:22:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:22:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:22:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-30 02:22:44,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47604485219164117 [2023-08-30 02:22:44,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-30 02:22:44,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-30 02:22:44,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:22:44,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-30 02:22:44,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:44,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:44,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:44,259 INFO L175 Difference]: Start difference. First operand has 357 places, 656 transitions, 9503 flow. Second operand 3 states and 467 transitions. [2023-08-30 02:22:44,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 644 transitions, 10480 flow [2023-08-30 02:22:45,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 644 transitions, 10207 flow, removed 76 selfloop flow, removed 10 redundant places. [2023-08-30 02:22:45,395 INFO L231 Difference]: Finished difference. Result has 340 places, 643 transitions, 9132 flow [2023-08-30 02:22:45,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=9132, PETRI_PLACES=340, PETRI_TRANSITIONS=643} [2023-08-30 02:22:45,396 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 292 predicate places. [2023-08-30 02:22:45,396 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 643 transitions, 9132 flow [2023-08-30 02:22:45,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:45,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:22:45,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:22:45,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 02:22:45,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 02:22:45,603 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:22:45,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:22:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1972717191, now seen corresponding path program 1 times [2023-08-30 02:22:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:22:45,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234542481] [2023-08-30 02:22:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:22:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:22:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:22:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:22:47,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:22:47,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234542481] [2023-08-30 02:22:47,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234542481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:22:47,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171101729] [2023-08-30 02:22:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:22:47,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:22:47,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:22:47,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:22:47,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 02:22:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:22:47,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-30 02:22:47,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:22:47,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 02:22:47,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-08-30 02:22:48,534 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 02:22:48,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 43 [2023-08-30 02:22:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:22:48,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:22:49,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-08-30 02:22:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:22:50,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171101729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:22:50,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:22:50,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 63 [2023-08-30 02:22:50,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469725990] [2023-08-30 02:22:50,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:22:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-08-30 02:22:50,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:22:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-08-30 02:22:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3750, Unknown=0, NotChecked=0, Total=4160 [2023-08-30 02:22:56,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:22:58,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:00,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2023-08-30 02:23:00,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 643 transitions, 9132 flow. Second operand has 65 states, 65 states have (on average 121.66153846153846) internal successors, (7908), 65 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:23:00,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:23:00,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2023-08-30 02:23:00,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:23:09,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:15,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:17,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:23,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:31,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:40,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:42,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:44,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:47,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:49,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:54,269 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_t2Thread1of1ForFork0_pop_~stack#1.base|)) (.cse1 (* c_~top~0 4)) (.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base|))) (and (not (= (mod (select .cse0 (+ |c_t2Thread1of1ForFork0_pop_~stack#1.offset| (* |c_t2Thread1of1ForFork0_get_top_#res#1| 4))) 4294967296) 4294967294)) (not (= (mod (select .cse0 (+ |c_t2Thread1of1ForFork0_pop_~stack#1.offset| .cse1)) 4294967296) 4294967294)) (forall ((v_ArrVal_959 Int) (v_~top~0_89 Int)) (or (<= v_~top~0_89 0) (not (= (mod (select (select (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_#in~stack#1.offset| .cse1) v_ArrVal_959)) |c_~#arr~0.base|) (+ (* v_~top~0_89 4) |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294)) (< c_~top~0 v_~top~0_89))) (forall ((v_ArrVal_959 Int) (v_~top~0_89 Int)) (or (not (= (mod (select (select (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse2 (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| .cse1) v_ArrVal_959)) |c_~#arr~0.base|) (+ (* v_~top~0_89 4) |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294)) (<= v_~top~0_89 0) (< c_~top~0 v_~top~0_89))) (forall ((v_ArrVal_959 Int) (v_~top~0_89 Int)) (or (not (= (mod (select (select (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse2 (+ (* |c_t1Thread1of1ForFork1_push_#t~ret34#1| 4) |c_t1Thread1of1ForFork1_push_~stack#1.offset|) v_ArrVal_959)) |c_~#arr~0.base|) (+ (* v_~top~0_89 4) |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294)) (<= v_~top~0_89 0) (< c_~top~0 v_~top~0_89))))) is different from false [2023-08-30 02:24:01,665 INFO L130 PetriNetUnfolder]: 21106/41142 cut-off events. [2023-08-30 02:24:01,665 INFO L131 PetriNetUnfolder]: For 186142/186142 co-relation queries the response was YES. [2023-08-30 02:24:02,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203582 conditions, 41142 events. 21106/41142 cut-off events. For 186142/186142 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 342607 event pairs, 4247 based on Foata normal form. 224/41093 useless extension candidates. Maximal degree in co-relation 203469. Up to 16149 conditions per place. [2023-08-30 02:24:02,645 INFO L137 encePairwiseOnDemand]: 305/327 looper letters, 981 selfloop transitions, 775 changer transitions 174/1930 dead transitions. [2023-08-30 02:24:02,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1930 transitions, 26328 flow [2023-08-30 02:24:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-08-30 02:24:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2023-08-30 02:24:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 18672 transitions. [2023-08-30 02:24:02,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832276337663937 [2023-08-30 02:24:02,665 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 18672 transitions. [2023-08-30 02:24:02,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 18672 transitions. [2023-08-30 02:24:02,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:24:02,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 18672 transitions. [2023-08-30 02:24:02,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 150 states, 149 states have (on average 125.31543624161074) internal successors, (18672), 149 states have internal predecessors, (18672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:02,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 150 states, 150 states have (on average 327.0) internal successors, (49050), 150 states have internal predecessors, (49050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:02,735 INFO L81 ComplementDD]: Finished complementDD. Result has 150 states, 150 states have (on average 327.0) internal successors, (49050), 150 states have internal predecessors, (49050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:02,735 INFO L175 Difference]: Start difference. First operand has 340 places, 643 transitions, 9132 flow. Second operand 149 states and 18672 transitions. [2023-08-30 02:24:02,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1930 transitions, 26328 flow [2023-08-30 02:24:04,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1930 transitions, 26327 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:24:04,679 INFO L231 Difference]: Finished difference. Result has 522 places, 1276 transitions, 20805 flow [2023-08-30 02:24:04,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=9131, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=149, PETRI_FLOW=20805, PETRI_PLACES=522, PETRI_TRANSITIONS=1276} [2023-08-30 02:24:04,680 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 474 predicate places. [2023-08-30 02:24:04,680 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1276 transitions, 20805 flow [2023-08-30 02:24:04,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 121.66153846153846) internal successors, (7908), 65 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:04,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:24:04,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:24:04,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 02:24:04,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 02:24:04,886 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:24:04,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:24:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash 796650369, now seen corresponding path program 2 times [2023-08-30 02:24:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:24:04,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061889181] [2023-08-30 02:24:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:24:04,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:24:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:24:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:24:06,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:24:06,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061889181] [2023-08-30 02:24:06,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061889181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:24:06,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803251223] [2023-08-30 02:24:06,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:24:06,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:24:06,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:24:06,485 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:24:06,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 02:24:06,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:24:06,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:24:06,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 02:24:06,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:24:06,669 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 02:24:06,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-30 02:24:06,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 02:24:07,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-30 02:24:07,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:24:07,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-08-30 02:24:08,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-30 02:24:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:24:08,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:24:13,173 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1028 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1028) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-30 02:24:13,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:24:13,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 02:24:13,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:24:13,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-30 02:24:13,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 02:24:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:24:13,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803251223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:24:13,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:24:13,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 20] total 65 [2023-08-30 02:24:13,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905309246] [2023-08-30 02:24:13,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:24:13,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-08-30 02:24:13,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:24:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-08-30 02:24:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4052, Unknown=2, NotChecked=128, Total=4422 [2023-08-30 02:24:13,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-30 02:24:13,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1276 transitions, 20805 flow. Second operand has 67 states, 67 states have (on average 88.61194029850746) internal successors, (5937), 67 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:13,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:24:13,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-30 02:24:13,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:20,814 INFO L130 PetriNetUnfolder]: 25121/49419 cut-off events. [2023-08-30 02:25:20,815 INFO L131 PetriNetUnfolder]: For 366235/366235 co-relation queries the response was YES. [2023-08-30 02:25:22,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283340 conditions, 49419 events. 25121/49419 cut-off events. For 366235/366235 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 423463 event pairs, 2565 based on Foata normal form. 710/49748 useless extension candidates. Maximal degree in co-relation 283191. Up to 14029 conditions per place. [2023-08-30 02:25:22,310 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 587 selfloop transitions, 1905 changer transitions 104/2596 dead transitions. [2023-08-30 02:25:22,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 2596 transitions, 41353 flow [2023-08-30 02:25:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-08-30 02:25:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2023-08-30 02:25:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 14530 transitions. [2023-08-30 02:25:22,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28122943521851895 [2023-08-30 02:25:22,326 INFO L72 ComplementDD]: Start complementDD. Operand 158 states and 14530 transitions. [2023-08-30 02:25:22,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 158 states and 14530 transitions. [2023-08-30 02:25:22,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:22,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 158 states and 14530 transitions. [2023-08-30 02:25:22,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 159 states, 158 states have (on average 91.9620253164557) internal successors, (14530), 158 states have internal predecessors, (14530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:22,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 159 states, 159 states have (on average 327.0) internal successors, (51993), 159 states have internal predecessors, (51993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:22,405 INFO L81 ComplementDD]: Finished complementDD. Result has 159 states, 159 states have (on average 327.0) internal successors, (51993), 159 states have internal predecessors, (51993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:22,406 INFO L175 Difference]: Start difference. First operand has 522 places, 1276 transitions, 20805 flow. Second operand 158 states and 14530 transitions. [2023-08-30 02:25:22,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 2596 transitions, 41353 flow [2023-08-30 02:25:26,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 2596 transitions, 38855 flow, removed 1035 selfloop flow, removed 23 redundant places. [2023-08-30 02:25:26,832 INFO L231 Difference]: Finished difference. Result has 649 places, 2030 transitions, 34667 flow [2023-08-30 02:25:26,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=15761, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1057, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=966, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=34667, PETRI_PLACES=649, PETRI_TRANSITIONS=2030} [2023-08-30 02:25:26,835 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 601 predicate places. [2023-08-30 02:25:26,835 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 2030 transitions, 34667 flow [2023-08-30 02:25:26,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 88.61194029850746) internal successors, (5937), 67 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:26,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:26,836 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-08-30 02:25:26,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 02:25:27,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 02:25:27,037 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:25:27,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:27,037 INFO L85 PathProgramCache]: Analyzing trace with hash 619878933, now seen corresponding path program 2 times [2023-08-30 02:25:27,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:27,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136878233] [2023-08-30 02:25:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:27,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:27,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136878233] [2023-08-30 02:25:27,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136878233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:25:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43636978] [2023-08-30 02:25:27,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:25:27,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:25:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:25:27,414 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:25:27,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 02:25:27,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:25:27,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:25:27,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 02:25:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:25:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:27,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:25:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:27,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43636978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:25:27,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:25:27,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 29 [2023-08-30 02:25:27,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550351496] [2023-08-30 02:25:27,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:25:27,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 02:25:27,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:27,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 02:25:27,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2023-08-30 02:25:27,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-30 02:25:27,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 2030 transitions, 34667 flow. Second operand has 30 states, 30 states have (on average 145.26666666666668) internal successors, (4358), 30 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:27,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:27,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-30 02:25:27,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:58,927 INFO L130 PetriNetUnfolder]: 28075/55255 cut-off events. [2023-08-30 02:25:58,927 INFO L131 PetriNetUnfolder]: For 401027/401027 co-relation queries the response was YES. [2023-08-30 02:26:00,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335275 conditions, 55255 events. 28075/55255 cut-off events. For 401027/401027 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 467235 event pairs, 9157 based on Foata normal form. 282/55074 useless extension candidates. Maximal degree in co-relation 335123. Up to 31197 conditions per place. [2023-08-30 02:26:00,931 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 2175 selfloop transitions, 640 changer transitions 9/2824 dead transitions. [2023-08-30 02:26:00,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 2824 transitions, 51816 flow [2023-08-30 02:26:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 02:26:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 02:26:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4767 transitions. [2023-08-30 02:26:00,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470257472625037 [2023-08-30 02:26:00,935 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4767 transitions. [2023-08-30 02:26:00,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4767 transitions. [2023-08-30 02:26:00,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:00,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4767 transitions. [2023-08-30 02:26:00,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 153.7741935483871) internal successors, (4767), 31 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:00,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:00,949 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:00,949 INFO L175 Difference]: Start difference. First operand has 649 places, 2030 transitions, 34667 flow. Second operand 31 states and 4767 transitions. [2023-08-30 02:26:00,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 2824 transitions, 51816 flow [2023-08-30 02:26:08,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 2824 transitions, 47031 flow, removed 1899 selfloop flow, removed 35 redundant places. [2023-08-30 02:26:08,141 INFO L231 Difference]: Finished difference. Result has 656 places, 2171 transitions, 35675 flow [2023-08-30 02:26:08,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=30564, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=35675, PETRI_PLACES=656, PETRI_TRANSITIONS=2171} [2023-08-30 02:26:08,144 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 608 predicate places. [2023-08-30 02:26:08,144 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 2171 transitions, 35675 flow [2023-08-30 02:26:08,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 145.26666666666668) internal successors, (4358), 30 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:08,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:08,145 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:26:08,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 02:26:08,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:26:08,352 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:26:08,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:08,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1799382781, now seen corresponding path program 3 times [2023-08-30 02:26:08,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:08,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165353647] [2023-08-30 02:26:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:08,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 02:26:08,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:08,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165353647] [2023-08-30 02:26:08,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165353647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:26:08,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553913740] [2023-08-30 02:26:08,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 02:26:08,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:26:08,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:26:08,663 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:26:08,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 02:26:08,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 02:26:08,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:26:08,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 02:26:08,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:26:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 02:26:08,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:26:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 02:26:09,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553913740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:26:09,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:26:09,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-08-30 02:26:09,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437373393] [2023-08-30 02:26:09,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:26:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 02:26:09,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 02:26:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-30 02:26:09,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 327 [2023-08-30 02:26:09,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 2171 transitions, 35675 flow. Second operand has 22 states, 22 states have (on average 143.13636363636363) internal successors, (3149), 22 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:09,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:09,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 327 [2023-08-30 02:26:09,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:49,391 INFO L130 PetriNetUnfolder]: 34526/67852 cut-off events. [2023-08-30 02:26:49,391 INFO L131 PetriNetUnfolder]: For 444658/444658 co-relation queries the response was YES. [2023-08-30 02:26:51,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395896 conditions, 67852 events. 34526/67852 cut-off events. For 444658/444658 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 591302 event pairs, 9283 based on Foata normal form. 206/66999 useless extension candidates. Maximal degree in co-relation 395746. Up to 19314 conditions per place. [2023-08-30 02:26:51,860 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 2155 selfloop transitions, 1048 changer transitions 9/3212 dead transitions. [2023-08-30 02:26:51,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 3212 transitions, 56261 flow [2023-08-30 02:26:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 02:26:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 02:26:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4030 transitions. [2023-08-30 02:26:51,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564503341261751 [2023-08-30 02:26:51,864 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4030 transitions. [2023-08-30 02:26:51,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4030 transitions. [2023-08-30 02:26:51,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:51,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4030 transitions. [2023-08-30 02:26:51,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 149.25925925925927) internal successors, (4030), 27 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:51,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 327.0) internal successors, (9156), 28 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:51,872 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 327.0) internal successors, (9156), 28 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:51,872 INFO L175 Difference]: Start difference. First operand has 656 places, 2171 transitions, 35675 flow. Second operand 27 states and 4030 transitions. [2023-08-30 02:26:51,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 3212 transitions, 56261 flow [2023-08-30 02:26:59,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 3212 transitions, 55016 flow, removed 246 selfloop flow, removed 14 redundant places. [2023-08-30 02:26:59,153 INFO L231 Difference]: Finished difference. Result has 678 places, 2370 transitions, 41148 flow [2023-08-30 02:26:59,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=34286, PETRI_DIFFERENCE_MINUEND_PLACES=642, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=886, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=41148, PETRI_PLACES=678, PETRI_TRANSITIONS=2370} [2023-08-30 02:26:59,156 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 630 predicate places. [2023-08-30 02:26:59,156 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 2370 transitions, 41148 flow [2023-08-30 02:26:59,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 143.13636363636363) internal successors, (3149), 22 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:59,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:59,157 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:26:59,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 02:26:59,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:26:59,366 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:26:59,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1799384336, now seen corresponding path program 3 times [2023-08-30 02:26:59,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:59,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458318445] [2023-08-30 02:26:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:59,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:27:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 02:27:00,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:27:00,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458318445] [2023-08-30 02:27:00,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458318445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:27:00,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284983807] [2023-08-30 02:27:00,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 02:27:00,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:27:00,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:27:00,612 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:27:00,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 02:27:00,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 02:27:00,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:27:00,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 02:27:00,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:27:00,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:27:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:27:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:27:00,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 02:27:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-30 02:27:01,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:27:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-30 02:27:02,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284983807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:27:02,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:27:02,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10, 9] total 42 [2023-08-30 02:27:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572114370] [2023-08-30 02:27:02,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:27:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 02:27:02,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:27:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 02:27:02,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1745, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 02:27:08,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 327 [2023-08-30 02:27:08,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 2370 transitions, 41148 flow. Second operand has 44 states, 44 states have (on average 127.36363636363636) internal successors, (5604), 44 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:08,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:27:08,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 327 [2023-08-30 02:27:08,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:27:54,186 INFO L130 PetriNetUnfolder]: 33995/67436 cut-off events. [2023-08-30 02:27:54,186 INFO L131 PetriNetUnfolder]: For 499117/499117 co-relation queries the response was YES. [2023-08-30 02:27:56,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392484 conditions, 67436 events. 33995/67436 cut-off events. For 499117/499117 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 586971 event pairs, 9890 based on Foata normal form. 1335/68660 useless extension candidates. Maximal degree in co-relation 392324. Up to 19415 conditions per place. [2023-08-30 02:27:57,230 INFO L137 encePairwiseOnDemand]: 314/327 looper letters, 800 selfloop transitions, 1803 changer transitions 6/2609 dead transitions. [2023-08-30 02:27:57,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 2609 transitions, 47710 flow [2023-08-30 02:27:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 02:27:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 02:27:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 6598 transitions. [2023-08-30 02:27:57,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035474006116208 [2023-08-30 02:27:57,237 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 6598 transitions. [2023-08-30 02:27:57,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 6598 transitions. [2023-08-30 02:27:57,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:27:57,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 6598 transitions. [2023-08-30 02:27:57,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 131.96) internal successors, (6598), 50 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:57,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 327.0) internal successors, (16677), 51 states have internal predecessors, (16677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:57,257 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 327.0) internal successors, (16677), 51 states have internal predecessors, (16677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:57,257 INFO L175 Difference]: Start difference. First operand has 678 places, 2370 transitions, 41148 flow. Second operand 50 states and 6598 transitions. [2023-08-30 02:27:57,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 2609 transitions, 47710 flow [2023-08-30 02:28:04,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 2609 transitions, 45906 flow, removed 369 selfloop flow, removed 15 redundant places. [2023-08-30 02:28:04,986 INFO L231 Difference]: Finished difference. Result has 713 places, 2327 transitions, 42093 flow [2023-08-30 02:28:04,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=35478, PETRI_DIFFERENCE_MINUEND_PLACES=662, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=42093, PETRI_PLACES=713, PETRI_TRANSITIONS=2327} [2023-08-30 02:28:04,988 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 665 predicate places. [2023-08-30 02:28:04,988 INFO L495 AbstractCegarLoop]: Abstraction has has 713 places, 2327 transitions, 42093 flow [2023-08-30 02:28:04,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 127.36363636363636) internal successors, (5604), 44 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:28:04,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:28:04,989 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:28:04,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 02:28:05,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:28:05,189 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:28:05,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:28:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash 294932578, now seen corresponding path program 3 times [2023-08-30 02:28:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:28:05,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962079921] [2023-08-30 02:28:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:28:05,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:28:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:28:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:28:06,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:28:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962079921] [2023-08-30 02:28:06,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962079921] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:28:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266765229] [2023-08-30 02:28:06,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 02:28:06,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:28:06,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:28:06,561 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:28:06,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 02:28:06,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 02:28:06,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:28:06,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-30 02:28:06,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:28:06,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-30 02:28:07,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:28:07,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2023-08-30 02:28:07,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:28:07,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2023-08-30 02:28:08,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 43 [2023-08-30 02:28:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:28:08,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:28:11,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 02:28:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:28:11,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266765229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:28:11,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:28:11,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 74 [2023-08-30 02:28:11,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945290406] [2023-08-30 02:28:11,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:28:11,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-08-30 02:28:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:28:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-08-30 02:28:11,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5268, Unknown=0, NotChecked=0, Total=5550 [2023-08-30 02:28:25,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 327 [2023-08-30 02:28:25,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 2327 transitions, 42093 flow. Second operand has 75 states, 75 states have (on average 127.96) internal successors, (9597), 75 states have internal predecessors, (9597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:28:25,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:28:25,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 327 [2023-08-30 02:28:25,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:29:50,550 INFO L130 PetriNetUnfolder]: 51673/102705 cut-off events. [2023-08-30 02:29:50,550 INFO L131 PetriNetUnfolder]: For 642052/642052 co-relation queries the response was YES. [2023-08-30 02:29:54,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609199 conditions, 102705 events. 51673/102705 cut-off events. For 642052/642052 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 944095 event pairs, 3955 based on Foata normal form. 58/102528 useless extension candidates. Maximal degree in co-relation 609040. Up to 28719 conditions per place. [2023-08-30 02:29:54,831 INFO L137 encePairwiseOnDemand]: 309/327 looper letters, 525 selfloop transitions, 3568 changer transitions 0/4116 dead transitions. [2023-08-30 02:29:54,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 794 places, 4116 transitions, 78879 flow [2023-08-30 02:29:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-08-30 02:29:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-08-30 02:29:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 10754 transitions. [2023-08-30 02:29:54,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40105914820616095 [2023-08-30 02:29:54,841 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 10754 transitions. [2023-08-30 02:29:54,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 10754 transitions. [2023-08-30 02:29:54,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:29:54,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 10754 transitions. [2023-08-30 02:29:54,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 131.14634146341464) internal successors, (10754), 82 states have internal predecessors, (10754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:29:54,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 327.0) internal successors, (27141), 83 states have internal predecessors, (27141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:29:54,872 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 327.0) internal successors, (27141), 83 states have internal predecessors, (27141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:29:54,873 INFO L175 Difference]: Start difference. First operand has 713 places, 2327 transitions, 42093 flow. Second operand 82 states and 10754 transitions. [2023-08-30 02:29:54,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 794 places, 4116 transitions, 78879 flow [2023-08-30 02:30:11,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 4116 transitions, 77186 flow, removed 336 selfloop flow, removed 14 redundant places. [2023-08-30 02:30:11,326 INFO L231 Difference]: Finished difference. Result has 787 places, 3787 transitions, 75294 flow [2023-08-30 02:30:11,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=41224, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=75294, PETRI_PLACES=787, PETRI_TRANSITIONS=3787} [2023-08-30 02:30:11,328 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 739 predicate places. [2023-08-30 02:30:11,328 INFO L495 AbstractCegarLoop]: Abstraction has has 787 places, 3787 transitions, 75294 flow [2023-08-30 02:30:11,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 127.96) internal successors, (9597), 75 states have internal predecessors, (9597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:11,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:30:11,330 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:30:11,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 02:30:11,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 02:30:11,536 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:30:11,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:30:11,536 INFO L85 PathProgramCache]: Analyzing trace with hash -3739198, now seen corresponding path program 4 times [2023-08-30 02:30:11,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:30:11,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840997026] [2023-08-30 02:30:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:30:11,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:30:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:30:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:30:14,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:30:14,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840997026] [2023-08-30 02:30:14,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840997026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:30:14,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433819989] [2023-08-30 02:30:14,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 02:30:14,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:30:14,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:30:14,321 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:30:14,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 02:30:14,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 02:30:14,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:30:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 100 conjunts are in the unsatisfiable core [2023-08-30 02:30:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:30:14,504 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 02:30:14,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-30 02:30:14,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-30 02:30:14,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2023-08-30 02:30:15,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:30:15,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2023-08-30 02:30:16,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:30:16,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2023-08-30 02:30:18,095 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 02:30:18,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 44 [2023-08-30 02:30:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:30:18,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:30:20,643 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1476 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1476) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-30 02:30:20,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:30:20,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 02:30:20,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:30:20,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-30 02:30:20,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 02:30:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:30:21,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433819989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:30:21,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:30:21,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 26] total 87 [2023-08-30 02:30:21,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390816568] [2023-08-30 02:30:21,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:30:21,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-08-30 02:30:21,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:30:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-08-30 02:30:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=7272, Unknown=1, NotChecked=172, Total=7832 [2023-08-30 02:30:21,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-30 02:30:21,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 3787 transitions, 75294 flow. Second operand has 89 states, 89 states have (on average 88.71910112359551) internal successors, (7896), 89 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:21,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:30:21,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-30 02:30:21,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:30:59,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:31:11,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:31:28,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:31:49,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:32:16,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:32:18,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15