./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-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_longer-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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --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 02:19:47,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:19:47,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:19:47,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:19:47,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:19:47,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:19:47,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:19:47,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:19:47,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:19:47,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:19:47,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:19:47,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:19:47,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:19:47,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:19:47,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:19:47,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:19:47,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:19:47,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:19:47,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:19:47,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:19:47,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:19:47,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:19:47,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:19:47,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:19:47,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:19:47,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:19:47,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:19:47,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:19:47,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:19:47,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:19:47,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:19:47,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:19:47,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:19:47,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:19:47,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:19:47,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:19:47,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:19:47,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:19:47,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:19:47,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:19:47,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:19:47,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:19:47,588 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:19:47,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:19:47,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:19:47,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:19:47,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:19:47,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:19:47,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:19:47,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:19:47,591 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:19:47,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:19:47,591 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:19:47,592 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:19:47,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:19:47,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:19:47,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:19:47,596 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:19:47,597 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:19:47,597 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:19:47,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:19:47,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:19:47,598 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:19:47,598 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:19:47,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:19:47,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:19:47,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:19:47,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:19:47,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:19:47,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:19:47,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:19:47,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:19:47,600 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:19:47,600 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:19:47,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:19:47,601 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:19:47,601 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:19:48,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:19:48,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:19:48,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:19:48,036 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:19:48,036 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:19:48,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2023-08-30 02:19:49,326 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:19:49,617 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:19:49,619 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2023-08-30 02:19:49,636 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/387fa52d2/9751819d0c6b4c76a7796b5b8952ddc8/FLAG8008f71f6 [2023-08-30 02:19:49,648 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/387fa52d2/9751819d0c6b4c76a7796b5b8952ddc8 [2023-08-30 02:19:49,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:19:49,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:19:49,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:19:49,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:19:49,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:19:49,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:19:49" (1/1) ... [2023-08-30 02:19:49,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27775a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:49, skipping insertion in model container [2023-08-30 02:19:49,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:19:49" (1/1) ... [2023-08-30 02:19:49,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:19:49,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:19:49,989 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_longer-2.i[41529,41542] [2023-08-30 02:19:50,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:19:50,028 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:19:50,079 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_longer-2.i[41529,41542] [2023-08-30 02:19:50,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:19:50,146 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:19:50,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50 WrapperNode [2023-08-30 02:19:50,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:19:50,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:19:50,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:19:50,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:19:50,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,209 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-08-30 02:19:50,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:19:50,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:19:50,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:19:50,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:19:50,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:19:50,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:19:50,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:19:50,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:19:50,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (1/1) ... [2023-08-30 02:19:50,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:19:50,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:19:50,327 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 02:19:50,372 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 02:19:50,391 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 02:19:50,391 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 02:19:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 02:19:50,392 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 02:19:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:19:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:19:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:19:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:19:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 02:19:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:19:50,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:19:50,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:19:50,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:19:50,394 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 02:19:50,507 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:19:50,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:19:50,770 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:19:50,776 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:19:50,778 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:19:50,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:19:50 BoogieIcfgContainer [2023-08-30 02:19:50,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:19:50,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:19:50,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:19:50,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:19:50,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:19:49" (1/3) ... [2023-08-30 02:19:50,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a3de40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:19:50, skipping insertion in model container [2023-08-30 02:19:50,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:50" (2/3) ... [2023-08-30 02:19:50,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a3de40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:19:50, skipping insertion in model container [2023-08-30 02:19:50,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:19:50" (3/3) ... [2023-08-30 02:19:50,788 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2023-08-30 02:19:50,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:19:50,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-30 02:19:50,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:19:50,895 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 02:19:50,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 167 transitions, 350 flow [2023-08-30 02:19:51,007 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-30 02:19:51,008 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:19:51,013 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 02:19:51,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 167 transitions, 350 flow [2023-08-30 02:19:51,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 161 transitions, 334 flow [2023-08-30 02:19:51,020 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:19:51,028 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-30 02:19:51,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-30 02:19:51,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 161 transitions, 334 flow [2023-08-30 02:19:51,061 INFO L130 PetriNetUnfolder]: 10/161 cut-off events. [2023-08-30 02:19:51,061 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:19:51,062 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 02:19:51,065 INFO L119 LiptonReduction]: Number of co-enabled transitions 7792 [2023-08-30 02:19:54,768 INFO L134 LiptonReduction]: Checked pairs total: 12544 [2023-08-30 02:19:54,768 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-30 02:19:54,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:19:54,801 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;@7c379769, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:19:54,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-30 02:19:54,803 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:19:54,803 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:19:54,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:54,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:19:54,805 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 02:19:54,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:54,809 INFO L85 PathProgramCache]: Analyzing trace with hash 680, now seen corresponding path program 1 times [2023-08-30 02:19:54,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:54,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123092887] [2023-08-30 02:19:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:54,900 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 02:19:54,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:54,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123092887] [2023-08-30 02:19:54,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123092887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:54,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:54,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:19:54,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374080743] [2023-08-30 02:19:54,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:54,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:19:54,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:19:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:19:54,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 327 [2023-08-30 02:19:54,934 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 02:19:54,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:54,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 327 [2023-08-30 02:19:54,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:55,184 INFO L130 PetriNetUnfolder]: 1250/1969 cut-off events. [2023-08-30 02:19:55,184 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 02:19:55,187 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 02:19:55,195 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 42 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-08-30 02:19:55,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 184 flow [2023-08-30 02:19:55,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:19:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:19:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 356 transitions. [2023-08-30 02:19:55,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443425076452599 [2023-08-30 02:19:55,215 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 356 transitions. [2023-08-30 02:19:55,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 356 transitions. [2023-08-30 02:19:55,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:55,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 356 transitions. [2023-08-30 02:19:55,223 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 02:19:55,228 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 02:19:55,229 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 02:19:55,230 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 356 transitions. [2023-08-30 02:19:55,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 184 flow [2023-08-30 02:19:55,233 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 02:19:55,234 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2023-08-30 02:19:55,235 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 02:19:55,242 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-30 02:19:55,242 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2023-08-30 02:19:55,242 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 02:19:55,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:55,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:19:55,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:19:55,243 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 02:19:55,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:55,249 INFO L85 PathProgramCache]: Analyzing trace with hash 671187, now seen corresponding path program 1 times [2023-08-30 02:19:55,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:55,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906128512] [2023-08-30 02:19:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:55,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:55,466 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 02:19:55,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:55,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906128512] [2023-08-30 02:19:55,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906128512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:55,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:55,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:19:55,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283551895] [2023-08-30 02:19:55,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:55,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:55,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:55,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:55,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:55,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-30 02:19:55,512 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 02:19:55,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:55,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-30 02:19:55,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:55,666 INFO L130 PetriNetUnfolder]: 1223/1917 cut-off events. [2023-08-30 02:19:55,667 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:19:55,668 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 02:19:55,675 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-30 02:19:55,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 168 flow [2023-08-30 02:19:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-30 02:19:55,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-30 02:19:55,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-30 02:19:55,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-30 02:19:55,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:55,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-30 02:19:55,680 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 02:19:55,697 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 02:19:55,698 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 02:19:55,698 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 495 transitions. [2023-08-30 02:19:55,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 168 flow [2023-08-30 02:19:55,699 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 02:19:55,699 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2023-08-30 02:19:55,700 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 02:19:55,700 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-30 02:19:55,700 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2023-08-30 02:19:55,701 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 02:19:55,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:55,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:19:55,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:19:55,702 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 02:19:55,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:55,702 INFO L85 PathProgramCache]: Analyzing trace with hash 671188, now seen corresponding path program 1 times [2023-08-30 02:19:55,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:55,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005403871] [2023-08-30 02:19:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:55,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:55,749 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 02:19:55,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:55,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005403871] [2023-08-30 02:19:55,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005403871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:55,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:55,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:19:55,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504381964] [2023-08-30 02:19:55,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:55,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:55,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:55,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:55,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-30 02:19:55,788 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 02:19:55,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:55,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-30 02:19:55,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:55,933 INFO L130 PetriNetUnfolder]: 1196/1865 cut-off events. [2023-08-30 02:19:55,934 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:19:55,935 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 02:19:55,942 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 02:19:55,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-30 02:19:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-30 02:19:55,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49031600407747195 [2023-08-30 02:19:55,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-30 02:19:55,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-30 02:19:55,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:55,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-30 02:19:55,947 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 02:19:55,949 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 02:19:55,950 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 02:19:55,950 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 481 transitions. [2023-08-30 02:19:55,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-30 02:19:55,951 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 02:19:55,951 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-30 02:19:55,952 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 02:19:55,952 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-30 02:19:55,953 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-30 02:19:55,953 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 02:19:55,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:55,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:19:55,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:19:55,954 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 02:19:55,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:55,954 INFO L85 PathProgramCache]: Analyzing trace with hash 645028316, now seen corresponding path program 1 times [2023-08-30 02:19:55,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:55,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697464428] [2023-08-30 02:19:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:56,052 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 02:19:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697464428] [2023-08-30 02:19:56,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697464428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:56,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:56,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583175562] [2023-08-30 02:19:56,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:19:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:19:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:19:56,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-30 02:19:56,116 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 02:19:56,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:56,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-30 02:19:56,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:56,223 INFO L130 PetriNetUnfolder]: 875/1390 cut-off events. [2023-08-30 02:19:56,224 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:19:56,225 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 02:19:56,229 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-30 02:19:56,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-30 02:19:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-30 02:19:56,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943934760448522 [2023-08-30 02:19:56,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-30 02:19:56,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-30 02:19:56,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:56,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-30 02:19:56,233 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 02:19:56,235 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 02:19:56,235 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 02:19:56,235 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 485 transitions. [2023-08-30 02:19:56,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-30 02:19:56,236 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 02:19:56,237 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-30 02:19:56,237 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 02:19:56,238 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-30 02:19:56,238 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-30 02:19:56,238 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 02:19:56,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:56,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:19:56,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:19:56,239 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 02:19:56,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash 645028315, now seen corresponding path program 1 times [2023-08-30 02:19:56,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:56,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889556959] [2023-08-30 02:19:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:56,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:56,291 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 02:19:56,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:56,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889556959] [2023-08-30 02:19:56,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889556959] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:56,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:56,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:56,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060999937] [2023-08-30 02:19:56,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:56,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:19:56,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:56,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:19:56,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:19:56,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 327 [2023-08-30 02:19:56,341 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 02:19:56,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:56,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 327 [2023-08-30 02:19:56,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:56,434 INFO L130 PetriNetUnfolder]: 554/915 cut-off events. [2023-08-30 02:19:56,434 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:19:56,435 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 02:19:56,438 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-30 02:19:56,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 156 flow [2023-08-30 02:19:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-30 02:19:56,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750254841997961 [2023-08-30 02:19:56,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-30 02:19:56,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-30 02:19:56,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:56,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-30 02:19:56,442 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 02:19:56,444 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 02:19:56,444 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 02:19:56,444 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 466 transitions. [2023-08-30 02:19:56,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 156 flow [2023-08-30 02:19:56,445 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 02:19:56,446 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2023-08-30 02:19:56,446 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 02:19:56,447 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-08-30 02:19:56,447 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2023-08-30 02:19:56,447 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 02:19:56,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:56,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:19:56,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:19:56,448 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 02:19:56,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:56,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137457, now seen corresponding path program 1 times [2023-08-30 02:19:56,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:56,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006866725] [2023-08-30 02:19:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:56,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:56,556 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 02:19:56,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:56,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006866725] [2023-08-30 02:19:56,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006866725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:56,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:56,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:56,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032609627] [2023-08-30 02:19:56,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:56,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:19:56,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:56,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:19:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:19:56,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 327 [2023-08-30 02:19:56,656 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 02:19:56,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:56,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 327 [2023-08-30 02:19:56,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:56,833 INFO L130 PetriNetUnfolder]: 630/1056 cut-off events. [2023-08-30 02:19:56,834 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:19:56,835 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 02:19:56,838 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 70 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-30 02:19:56,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 79 transitions, 326 flow [2023-08-30 02:19:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:19:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:19:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 818 transitions. [2023-08-30 02:19:56,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003058103975535 [2023-08-30 02:19:56,841 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 818 transitions. [2023-08-30 02:19:56,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 818 transitions. [2023-08-30 02:19:56,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:56,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 818 transitions. [2023-08-30 02:19:56,844 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 02:19:56,846 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 02:19:56,847 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 02:19:56,847 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 5 states and 818 transitions. [2023-08-30 02:19:56,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 79 transitions, 326 flow [2023-08-30 02:19:56,848 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 02:19:56,849 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 96 flow [2023-08-30 02:19:56,850 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 02:19:56,850 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-30 02:19:56,850 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 96 flow [2023-08-30 02:19:56,851 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 02:19:56,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:56,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:19:56,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:19:56,852 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 02:19:56,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137456, now seen corresponding path program 1 times [2023-08-30 02:19:56,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:56,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287242722] [2023-08-30 02:19:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:56,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:57,012 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 02:19:57,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287242722] [2023-08-30 02:19:57,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287242722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:57,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:57,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:57,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359463292] [2023-08-30 02:19:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:57,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:19:57,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:19:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:19:57,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-30 02:19:57,131 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 02:19:57,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:57,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-30 02:19:57,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:57,333 INFO L130 PetriNetUnfolder]: 570/959 cut-off events. [2023-08-30 02:19:57,333 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 02:19:57,334 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 02:19:57,336 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 62 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-08-30 02:19:57,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 293 flow [2023-08-30 02:19:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:19:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:19:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-08-30 02:19:57,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929663608562691 [2023-08-30 02:19:57,338 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-08-30 02:19:57,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-08-30 02:19:57,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:57,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-08-30 02:19:57,340 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 02:19:57,342 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 02:19:57,342 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 02:19:57,342 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 5 states and 806 transitions. [2023-08-30 02:19:57,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 293 flow [2023-08-30 02:19:57,343 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 02:19:57,344 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 122 flow [2023-08-30 02:19:57,344 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 02:19:57,344 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-30 02:19:57,345 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 122 flow [2023-08-30 02:19:57,345 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 02:19:57,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:57,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:57,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:19:57,345 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 02:19:57,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash -161798454, now seen corresponding path program 1 times [2023-08-30 02:19:57,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:57,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118915859] [2023-08-30 02:19:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:57,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:57,371 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 02:19:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118915859] [2023-08-30 02:19:57,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118915859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:57,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:57,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973626950] [2023-08-30 02:19:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:57,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:57,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:57,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:57,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:57,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-30 02:19:57,379 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 02:19:57,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:57,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-30 02:19:57,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:57,476 INFO L130 PetriNetUnfolder]: 615/1052 cut-off events. [2023-08-30 02:19:57,477 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-30 02:19:57,478 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 02:19:57,480 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 55 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-30 02:19:57,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 283 flow [2023-08-30 02:19:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-30 02:19:57,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208970438328236 [2023-08-30 02:19:57,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-30 02:19:57,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-30 02:19:57,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:57,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-30 02:19:57,483 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 02:19:57,484 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 02:19:57,485 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 02:19:57,485 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 122 flow. Second operand 3 states and 511 transitions. [2023-08-30 02:19:57,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 283 flow [2023-08-30 02:19:57,486 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 02:19:57,486 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 133 flow [2023-08-30 02:19:57,487 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 02:19:57,487 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-08-30 02:19:57,487 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 133 flow [2023-08-30 02:19:57,487 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 02:19:57,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:57,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:57,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:19:57,488 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 02:19:57,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:57,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1200004358, now seen corresponding path program 1 times [2023-08-30 02:19:57,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:57,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360708988] [2023-08-30 02:19:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:57,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:57,514 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 02:19:57,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:57,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360708988] [2023-08-30 02:19:57,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360708988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:57,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:57,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:57,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312946741] [2023-08-30 02:19:57,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:57,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:57,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:57,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-30 02:19:57,523 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 02:19:57,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:57,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-30 02:19:57,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:57,630 INFO L130 PetriNetUnfolder]: 638/1077 cut-off events. [2023-08-30 02:19:57,631 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-08-30 02:19:57,632 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 02:19:57,635 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 58 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-30 02:19:57,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 302 flow [2023-08-30 02:19:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-30 02:19:57,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259938837920489 [2023-08-30 02:19:57,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-30 02:19:57,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-30 02:19:57,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:57,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-30 02:19:57,639 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 02:19:57,640 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 02:19:57,641 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 02:19:57,641 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 133 flow. Second operand 3 states and 516 transitions. [2023-08-30 02:19:57,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 302 flow [2023-08-30 02:19:57,643 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 02:19:57,644 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 141 flow [2023-08-30 02:19:57,644 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 02:19:57,645 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-08-30 02:19:57,645 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 141 flow [2023-08-30 02:19:57,645 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 02:19:57,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:57,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:57,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:19:57,646 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 02:19:57,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:57,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1183384702, now seen corresponding path program 1 times [2023-08-30 02:19:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:57,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206481844] [2023-08-30 02:19:57,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:57,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:57,925 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 02:19:57,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:57,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206481844] [2023-08-30 02:19:57,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206481844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:19:57,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706630200] [2023-08-30 02:19:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:57,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:19:57,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:19:57,954 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 02:19:57,969 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 02:19:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:58,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 02:19:58,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:19:58,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:19:58,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:19:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:19:58,105 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 02:19:58,286 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 02:19:58,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:19:58,417 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 02:19:58,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706630200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:19:58,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:19:58,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-30 02:19:58,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128628983] [2023-08-30 02:19:58,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:19:58,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 02:19:58,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 02:19:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-30 02:19:59,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-30 02:19:59,391 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 02:19:59,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:59,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-30 02:19:59,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:00,372 INFO L130 PetriNetUnfolder]: 1709/2796 cut-off events. [2023-08-30 02:20:00,372 INFO L131 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2023-08-30 02:20:00,376 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 02:20:00,386 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 204 selfloop transitions, 22 changer transitions 0/226 dead transitions. [2023-08-30 02:20:00,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 226 transitions, 1075 flow [2023-08-30 02:20:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:20:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:20:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2166 transitions. [2023-08-30 02:20:00,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47313237221494103 [2023-08-30 02:20:00,392 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2166 transitions. [2023-08-30 02:20:00,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2166 transitions. [2023-08-30 02:20:00,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:00,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2166 transitions. [2023-08-30 02:20:00,397 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 02:20:00,402 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 02:20:00,403 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 02:20:00,403 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 141 flow. Second operand 14 states and 2166 transitions. [2023-08-30 02:20:00,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 226 transitions, 1075 flow [2023-08-30 02:20:00,406 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 02:20:00,408 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 308 flow [2023-08-30 02:20:00,408 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 02:20:00,409 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-30 02:20:00,409 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 308 flow [2023-08-30 02:20:00,410 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 02:20:00,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:00,410 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 02:20:00,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 02:20:00,616 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 02:20:00,617 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 02:20:00,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 705944842, now seen corresponding path program 1 times [2023-08-30 02:20:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:00,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707222025] [2023-08-30 02:20:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:00,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:00,694 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 02:20:00,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707222025] [2023-08-30 02:20:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707222025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:00,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:00,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:00,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375885734] [2023-08-30 02:20:00,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:00,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:00,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 327 [2023-08-30 02:20:00,709 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 02:20:00,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:00,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 327 [2023-08-30 02:20:00,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:00,799 INFO L130 PetriNetUnfolder]: 487/940 cut-off events. [2023-08-30 02:20:00,799 INFO L131 PetriNetUnfolder]: For 896/896 co-relation queries the response was YES. [2023-08-30 02:20:00,801 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 02:20:00,809 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 48 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2023-08-30 02:20:00,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 406 flow [2023-08-30 02:20:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-30 02:20:00,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056065239551478 [2023-08-30 02:20:00,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-30 02:20:00,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-30 02:20:00,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:00,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-30 02:20:00,813 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 02:20:00,814 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 02:20:00,815 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 02:20:00,815 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 308 flow. Second operand 3 states and 496 transitions. [2023-08-30 02:20:00,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 406 flow [2023-08-30 02:20:00,821 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 02:20:00,822 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 254 flow [2023-08-30 02:20:00,822 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 02:20:00,823 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-30 02:20:00,823 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 254 flow [2023-08-30 02:20:00,823 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 02:20:00,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:00,824 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 02:20:00,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:20:00,824 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 02:20:00,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash -190660559, now seen corresponding path program 1 times [2023-08-30 02:20:00,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:00,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662710313] [2023-08-30 02:20:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:00,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:01,206 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 02:20:01,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:01,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662710313] [2023-08-30 02:20:01,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662710313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:01,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:01,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-30 02:20:01,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791916467] [2023-08-30 02:20:01,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:01,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 02:20:01,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:01,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 02:20:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-30 02:20:01,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 327 [2023-08-30 02:20:01,856 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 02:20:01,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:01,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 327 [2023-08-30 02:20:01,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:02,369 INFO L130 PetriNetUnfolder]: 695/1286 cut-off events. [2023-08-30 02:20:02,370 INFO L131 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2023-08-30 02:20:02,372 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 02:20:02,375 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 138 selfloop transitions, 17 changer transitions 0/155 dead transitions. [2023-08-30 02:20:02,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 155 transitions, 894 flow [2023-08-30 02:20:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 02:20:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 02:20:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1842 transitions. [2023-08-30 02:20:02,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43330980945659847 [2023-08-30 02:20:02,378 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1842 transitions. [2023-08-30 02:20:02,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1842 transitions. [2023-08-30 02:20:02,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:02,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1842 transitions. [2023-08-30 02:20:02,382 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 02:20:02,385 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 02:20:02,386 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 02:20:02,386 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 254 flow. Second operand 13 states and 1842 transitions. [2023-08-30 02:20:02,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 155 transitions, 894 flow [2023-08-30 02:20:02,389 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 02:20:02,391 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 360 flow [2023-08-30 02:20:02,391 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 02:20:02,391 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2023-08-30 02:20:02,391 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 360 flow [2023-08-30 02:20:02,392 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 02:20:02,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:02,392 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 02:20:02,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:20:02,393 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 02:20:02,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:02,393 INFO L85 PathProgramCache]: Analyzing trace with hash -891010450, now seen corresponding path program 1 times [2023-08-30 02:20:02,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:02,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589793348] [2023-08-30 02:20:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:02,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:02,452 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 02:20:02,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:02,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589793348] [2023-08-30 02:20:02,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589793348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:02,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:02,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:20:02,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620502680] [2023-08-30 02:20:02,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:02,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:20:02,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:02,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:20:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:20:02,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 327 [2023-08-30 02:20:02,637 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 02:20:02,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:02,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 327 [2023-08-30 02:20:02,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:02,871 INFO L130 PetriNetUnfolder]: 763/1464 cut-off events. [2023-08-30 02:20:02,872 INFO L131 PetriNetUnfolder]: For 1111/1111 co-relation queries the response was YES. [2023-08-30 02:20:02,875 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 02:20:02,879 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 77 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2023-08-30 02:20:02,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 743 flow [2023-08-30 02:20:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:20:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:20:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2023-08-30 02:20:02,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658511722731906 [2023-08-30 02:20:02,882 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2023-08-30 02:20:02,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2023-08-30 02:20:02,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:02,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2023-08-30 02:20:02,884 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 02:20:02,887 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 02:20:02,887 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 02:20:02,888 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 360 flow. Second operand 9 states and 1371 transitions. [2023-08-30 02:20:02,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 743 flow [2023-08-30 02:20:02,892 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 02:20:02,893 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 482 flow [2023-08-30 02:20:02,893 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 02:20:02,894 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 37 predicate places. [2023-08-30 02:20:02,894 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 482 flow [2023-08-30 02:20:02,895 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 02:20:02,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:02,895 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 02:20:02,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:20:02,895 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 02:20:02,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash -72479684, now seen corresponding path program 1 times [2023-08-30 02:20:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:02,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745412592] [2023-08-30 02:20:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:02,922 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 02:20:02,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:02,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745412592] [2023-08-30 02:20:02,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745412592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:02,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:02,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:02,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471538209] [2023-08-30 02:20:02,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:02,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:02,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:02,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:02,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-30 02:20:02,929 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 02:20:02,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:02,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-30 02:20:02,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:03,125 INFO L130 PetriNetUnfolder]: 987/1898 cut-off events. [2023-08-30 02:20:03,125 INFO L131 PetriNetUnfolder]: For 2198/2202 co-relation queries the response was YES. [2023-08-30 02:20:03,130 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 02:20:03,135 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 110 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2023-08-30 02:20:03,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1007 flow [2023-08-30 02:20:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 02:20:03,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527013251783894 [2023-08-30 02:20:03,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 02:20:03,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 02:20:03,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:03,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 02:20:03,139 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 02:20:03,140 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 02:20:03,140 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 02:20:03,140 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 482 flow. Second operand 3 states and 517 transitions. [2023-08-30 02:20:03,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1007 flow [2023-08-30 02:20:03,147 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 02:20:03,149 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 449 flow [2023-08-30 02:20:03,149 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 02:20:03,150 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2023-08-30 02:20:03,150 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 449 flow [2023-08-30 02:20:03,150 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 02:20:03,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:03,150 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 02:20:03,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:20:03,150 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 02:20:03,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1459253539, now seen corresponding path program 1 times [2023-08-30 02:20:03,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:03,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924733050] [2023-08-30 02:20:03,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:03,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:03,265 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 02:20:03,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:03,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924733050] [2023-08-30 02:20:03,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924733050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386122396] [2023-08-30 02:20:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:03,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:03,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:03,283 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 02:20:03,284 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 02:20:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:03,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 02:20:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:03,403 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 02:20:03,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:03,448 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 02:20:03,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386122396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:03,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:03,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-30 02:20:03,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729981409] [2023-08-30 02:20:03,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:03,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:20:03,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:20:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:20:03,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-30 02:20:03,511 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 02:20:03,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:03,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-30 02:20:03,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:04,128 INFO L130 PetriNetUnfolder]: 2081/3874 cut-off events. [2023-08-30 02:20:04,128 INFO L131 PetriNetUnfolder]: For 3811/3811 co-relation queries the response was YES. [2023-08-30 02:20:04,138 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 02:20:04,148 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 226 selfloop transitions, 52 changer transitions 0/278 dead transitions. [2023-08-30 02:20:04,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 278 transitions, 2002 flow [2023-08-30 02:20:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 02:20:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 02:20:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2488 transitions. [2023-08-30 02:20:04,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47553516819571867 [2023-08-30 02:20:04,153 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2488 transitions. [2023-08-30 02:20:04,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2488 transitions. [2023-08-30 02:20:04,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:04,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2488 transitions. [2023-08-30 02:20:04,157 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 02:20:04,162 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 02:20:04,162 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 02:20:04,162 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 449 flow. Second operand 16 states and 2488 transitions. [2023-08-30 02:20:04,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 278 transitions, 2002 flow [2023-08-30 02:20:04,174 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 02:20:04,177 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 959 flow [2023-08-30 02:20:04,177 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 02:20:04,177 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 60 predicate places. [2023-08-30 02:20:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 959 flow [2023-08-30 02:20:04,178 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 02:20:04,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:04,178 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 02:20:04,191 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 02:20:04,383 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 02:20:04,384 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 02:20:04,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1566742044, now seen corresponding path program 1 times [2023-08-30 02:20:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:04,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567061598] [2023-08-30 02:20:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:04,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:04,851 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 02:20:04,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:04,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567061598] [2023-08-30 02:20:04,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567061598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:04,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:04,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:20:04,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052307940] [2023-08-30 02:20:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:04,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:20:04,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:20:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:20:05,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-30 02:20:05,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 959 flow. Second operand has 14 states, 14 states have (on average 128.5) internal successors, (1799), 14 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:05,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:05,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-30 02:20:05,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:08,280 INFO L130 PetriNetUnfolder]: 3566/6769 cut-off events. [2023-08-30 02:20:08,280 INFO L131 PetriNetUnfolder]: For 13994/13994 co-relation queries the response was YES. [2023-08-30 02:20:08,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25118 conditions, 6769 events. 3566/6769 cut-off events. For 13994/13994 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 41806 event pairs, 744 based on Foata normal form. 24/6745 useless extension candidates. Maximal degree in co-relation 25081. Up to 1479 conditions per place. [2023-08-30 02:20:08,323 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 194 selfloop transitions, 191 changer transitions 0/392 dead transitions. [2023-08-30 02:20:08,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 392 transitions, 3518 flow [2023-08-30 02:20:08,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 02:20:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 02:20:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4797 transitions. [2023-08-30 02:20:08,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074923547400612 [2023-08-30 02:20:08,330 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4797 transitions. [2023-08-30 02:20:08,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4797 transitions. [2023-08-30 02:20:08,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:08,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4797 transitions. [2023-08-30 02:20:08,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 133.25) internal successors, (4797), 36 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:08,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 327.0) internal successors, (12099), 37 states have internal predecessors, (12099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:08,346 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 327.0) internal successors, (12099), 37 states have internal predecessors, (12099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:08,346 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 959 flow. Second operand 36 states and 4797 transitions. [2023-08-30 02:20:08,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 392 transitions, 3518 flow [2023-08-30 02:20:08,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 392 transitions, 3261 flow, removed 125 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:08,403 INFO L231 Difference]: Finished difference. Result has 149 places, 254 transitions, 2617 flow [2023-08-30 02:20:08,403 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=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2617, PETRI_PLACES=149, PETRI_TRANSITIONS=254} [2023-08-30 02:20:08,403 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 101 predicate places. [2023-08-30 02:20:08,403 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 254 transitions, 2617 flow [2023-08-30 02:20:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.5) internal successors, (1799), 14 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:08,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:08,404 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 02:20:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:20:08,404 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 02:20:08,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash -686962716, now seen corresponding path program 2 times [2023-08-30 02:20:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:08,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554751841] [2023-08-30 02:20:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:08,974 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 02:20:08,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554751841] [2023-08-30 02:20:08,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554751841] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:08,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:08,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:20:08,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950030838] [2023-08-30 02:20:08,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:08,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:20:08,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:20:08,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:20:10,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2023-08-30 02:20:10,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 254 transitions, 2617 flow. Second operand has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:10,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:10,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2023-08-30 02:20:10,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:11,786 INFO L130 PetriNetUnfolder]: 3798/7207 cut-off events. [2023-08-30 02:20:11,786 INFO L131 PetriNetUnfolder]: For 15690/15690 co-relation queries the response was YES. [2023-08-30 02:20:11,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29085 conditions, 7207 events. 3798/7207 cut-off events. For 15690/15690 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 45113 event pairs, 1655 based on Foata normal form. 6/7160 useless extension candidates. Maximal degree in co-relation 29041. Up to 5881 conditions per place. [2023-08-30 02:20:11,885 INFO L137 encePairwiseOnDemand]: 311/327 looper letters, 315 selfloop transitions, 41 changer transitions 0/363 dead transitions. [2023-08-30 02:20:11,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 363 transitions, 3953 flow [2023-08-30 02:20:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:20:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:20:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1811 transitions. [2023-08-30 02:20:11,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39558759283529926 [2023-08-30 02:20:11,888 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1811 transitions. [2023-08-30 02:20:11,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1811 transitions. [2023-08-30 02:20:11,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:11,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1811 transitions. [2023-08-30 02:20:11,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 129.35714285714286) internal successors, (1811), 14 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:11,895 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 02:20:11,896 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 02:20:11,896 INFO L175 Difference]: Start difference. First operand has 149 places, 254 transitions, 2617 flow. Second operand 14 states and 1811 transitions. [2023-08-30 02:20:11,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 363 transitions, 3953 flow [2023-08-30 02:20:11,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 363 transitions, 3723 flow, removed 114 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:11,993 INFO L231 Difference]: Finished difference. Result has 168 places, 275 transitions, 2751 flow [2023-08-30 02:20:11,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2751, PETRI_PLACES=168, PETRI_TRANSITIONS=275} [2023-08-30 02:20:11,994 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 120 predicate places. [2023-08-30 02:20:11,994 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 275 transitions, 2751 flow [2023-08-30 02:20:11,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:11,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:11,995 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 02:20:11,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:20:11,995 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:11,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:11,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1121809114, now seen corresponding path program 3 times [2023-08-30 02:20:11,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:11,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143181308] [2023-08-30 02:20:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:11,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:12,565 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 02:20:12,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:12,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143181308] [2023-08-30 02:20:12,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143181308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:12,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:12,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:20:12,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450742069] [2023-08-30 02:20:12,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:12,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:20:12,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:12,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:20:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:20:13,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2023-08-30 02:20:13,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 275 transitions, 2751 flow. Second operand has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:13,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:13,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2023-08-30 02:20:13,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:15,318 INFO L130 PetriNetUnfolder]: 3792/7195 cut-off events. [2023-08-30 02:20:15,318 INFO L131 PetriNetUnfolder]: For 13316/13316 co-relation queries the response was YES. [2023-08-30 02:20:15,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28463 conditions, 7195 events. 3792/7195 cut-off events. For 13316/13316 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 44987 event pairs, 1577 based on Foata normal form. 6/7107 useless extension candidates. Maximal degree in co-relation 28411. Up to 5472 conditions per place. [2023-08-30 02:20:15,368 INFO L137 encePairwiseOnDemand]: 311/327 looper letters, 305 selfloop transitions, 50 changer transitions 0/362 dead transitions. [2023-08-30 02:20:15,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 362 transitions, 3881 flow [2023-08-30 02:20:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 02:20:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 02:20:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1931 transitions. [2023-08-30 02:20:15,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39367991845056066 [2023-08-30 02:20:15,371 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1931 transitions. [2023-08-30 02:20:15,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1931 transitions. [2023-08-30 02:20:15,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:15,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1931 transitions. [2023-08-30 02:20:15,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.73333333333332) internal successors, (1931), 15 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:15,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 327.0) internal successors, (5232), 16 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:15,377 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 327.0) internal successors, (5232), 16 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:15,377 INFO L175 Difference]: Start difference. First operand has 168 places, 275 transitions, 2751 flow. Second operand 15 states and 1931 transitions. [2023-08-30 02:20:15,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 362 transitions, 3881 flow [2023-08-30 02:20:15,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 362 transitions, 3839 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-30 02:20:15,460 INFO L231 Difference]: Finished difference. Result has 180 places, 281 transitions, 2913 flow [2023-08-30 02:20:15,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2913, PETRI_PLACES=180, PETRI_TRANSITIONS=281} [2023-08-30 02:20:15,461 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 132 predicate places. [2023-08-30 02:20:15,461 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 281 transitions, 2913 flow [2023-08-30 02:20:15,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:15,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:15,462 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 02:20:15,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:20:15,462 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:15,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:15,462 INFO L85 PathProgramCache]: Analyzing trace with hash 36144378, now seen corresponding path program 1 times [2023-08-30 02:20:15,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:15,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844945272] [2023-08-30 02:20:15,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:15,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:15,491 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 02:20:15,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:15,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844945272] [2023-08-30 02:20:15,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844945272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:15,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656287277] [2023-08-30 02:20:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:15,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:15,507 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 02:20:15,509 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 02:20:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:15,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:20:15,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:15,597 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 02:20:15,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:15,608 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 02:20:15,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656287277] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:15,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:15,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 02:20:15,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871217550] [2023-08-30 02:20:15,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:15,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:20:15,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:20:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:20:15,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-30 02:20:15,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 281 transitions, 2913 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 02:20:15,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:15,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-30 02:20:15,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:17,612 INFO L130 PetriNetUnfolder]: 6111/12492 cut-off events. [2023-08-30 02:20:17,613 INFO L131 PetriNetUnfolder]: For 29175/29199 co-relation queries the response was YES. [2023-08-30 02:20:17,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50017 conditions, 12492 events. 6111/12492 cut-off events. For 29175/29199 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 95065 event pairs, 2081 based on Foata normal form. 1782/14093 useless extension candidates. Maximal degree in co-relation 49961. Up to 3306 conditions per place. [2023-08-30 02:20:17,831 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 731 selfloop transitions, 20 changer transitions 0/789 dead transitions. [2023-08-30 02:20:17,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 789 transitions, 9867 flow [2023-08-30 02:20:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:20:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:20:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1036 transitions. [2023-08-30 02:20:17,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528032619775739 [2023-08-30 02:20:17,835 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1036 transitions. [2023-08-30 02:20:17,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1036 transitions. [2023-08-30 02:20:17,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:17,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1036 transitions. [2023-08-30 02:20:17,836 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 02:20:17,838 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 02:20:17,838 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 02:20:17,838 INFO L175 Difference]: Start difference. First operand has 180 places, 281 transitions, 2913 flow. Second operand 6 states and 1036 transitions. [2023-08-30 02:20:17,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 789 transitions, 9867 flow [2023-08-30 02:20:18,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 789 transitions, 9711 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-30 02:20:18,062 INFO L231 Difference]: Finished difference. Result has 179 places, 290 transitions, 3007 flow [2023-08-30 02:20:18,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3007, PETRI_PLACES=179, PETRI_TRANSITIONS=290} [2023-08-30 02:20:18,063 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 131 predicate places. [2023-08-30 02:20:18,063 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 290 transitions, 3007 flow [2023-08-30 02:20:18,063 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 02:20:18,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:18,064 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 02:20:18,075 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 02:20:18,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:18,270 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:18,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:18,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1551124284, now seen corresponding path program 1 times [2023-08-30 02:20:18,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:18,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983217746] [2023-08-30 02:20:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:18,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:18,326 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 02:20:18,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:18,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983217746] [2023-08-30 02:20:18,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983217746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:18,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:18,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:18,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047553907] [2023-08-30 02:20:18,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:18,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:18,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:18,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:18,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:18,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-30 02:20:18,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 290 transitions, 3007 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 02:20:18,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:18,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-30 02:20:18,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:20,466 INFO L130 PetriNetUnfolder]: 6166/12468 cut-off events. [2023-08-30 02:20:20,466 INFO L131 PetriNetUnfolder]: For 36524/36548 co-relation queries the response was YES. [2023-08-30 02:20:20,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53631 conditions, 12468 events. 6166/12468 cut-off events. For 36524/36548 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 92242 event pairs, 3463 based on Foata normal form. 426/12697 useless extension candidates. Maximal degree in co-relation 53572. Up to 8461 conditions per place. [2023-08-30 02:20:20,588 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 245 selfloop transitions, 37 changer transitions 0/311 dead transitions. [2023-08-30 02:20:20,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 311 transitions, 3710 flow [2023-08-30 02:20:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-30 02:20:20,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127420998980632 [2023-08-30 02:20:20,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-30 02:20:20,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-30 02:20:20,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:20,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-30 02:20:20,590 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 02:20:20,592 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 02:20:20,592 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 02:20:20,592 INFO L175 Difference]: Start difference. First operand has 179 places, 290 transitions, 3007 flow. Second operand 3 states and 503 transitions. [2023-08-30 02:20:20,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 311 transitions, 3710 flow [2023-08-30 02:20:20,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 311 transitions, 3630 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-30 02:20:20,862 INFO L231 Difference]: Finished difference. Result has 173 places, 267 transitions, 2921 flow [2023-08-30 02:20:20,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2921, PETRI_PLACES=173, PETRI_TRANSITIONS=267} [2023-08-30 02:20:20,862 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 125 predicate places. [2023-08-30 02:20:20,862 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 267 transitions, 2921 flow [2023-08-30 02:20:20,863 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 02:20:20,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:20,863 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 02:20:20,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:20:20,863 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 02:20:20,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash -53631562, now seen corresponding path program 1 times [2023-08-30 02:20:20,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:20,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373415773] [2023-08-30 02:20:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:20,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:21,135 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 02:20:21,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:21,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373415773] [2023-08-30 02:20:21,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373415773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:21,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253603210] [2023-08-30 02:20:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:21,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:21,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:21,138 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 02:20:21,153 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 02:20:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 02:20:21,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:21,631 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 02:20:21,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:21,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:20:21,960 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 02:20:22,147 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 02:20:22,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253603210] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:22,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:22,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-30 02:20:22,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538715522] [2023-08-30 02:20:22,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 02:20:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 02:20:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 02:20:24,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2023-08-30 02:20:24,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 267 transitions, 2921 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 02:20:24,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:24,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2023-08-30 02:20:24,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:27,974 INFO L130 PetriNetUnfolder]: 6659/13084 cut-off events. [2023-08-30 02:20:27,974 INFO L131 PetriNetUnfolder]: For 42965/42965 co-relation queries the response was YES. [2023-08-30 02:20:28,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57194 conditions, 13084 events. 6659/13084 cut-off events. For 42965/42965 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 94768 event pairs, 913 based on Foata normal form. 118/13067 useless extension candidates. Maximal degree in co-relation 57136. Up to 4005 conditions per place. [2023-08-30 02:20:28,064 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 239 selfloop transitions, 247 changer transitions 0/486 dead transitions. [2023-08-30 02:20:28,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 486 transitions, 5204 flow [2023-08-30 02:20:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 02:20:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 02:20:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4719 transitions. [2023-08-30 02:20:28,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41231979030144167 [2023-08-30 02:20:28,071 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4719 transitions. [2023-08-30 02:20:28,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4719 transitions. [2023-08-30 02:20:28,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:28,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4719 transitions. [2023-08-30 02:20:28,079 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 02:20:28,087 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 02:20:28,087 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 02:20:28,087 INFO L175 Difference]: Start difference. First operand has 173 places, 267 transitions, 2921 flow. Second operand 35 states and 4719 transitions. [2023-08-30 02:20:28,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 486 transitions, 5204 flow [2023-08-30 02:20:28,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 486 transitions, 5083 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 02:20:28,269 INFO L231 Difference]: Finished difference. Result has 203 places, 313 transitions, 3755 flow [2023-08-30 02:20:28,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3755, PETRI_PLACES=203, PETRI_TRANSITIONS=313} [2023-08-30 02:20:28,270 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 155 predicate places. [2023-08-30 02:20:28,270 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 313 transitions, 3755 flow [2023-08-30 02:20:28,271 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 02:20:28,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:28,271 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 02:20:28,278 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 02:20:28,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:28,477 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:28,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:28,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2127084341, now seen corresponding path program 1 times [2023-08-30 02:20:28,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:28,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540394706] [2023-08-30 02:20:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:28,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:28,572 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 02:20:28,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:28,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540394706] [2023-08-30 02:20:28,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540394706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:28,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:28,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:20:28,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495761802] [2023-08-30 02:20:28,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:28,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:20:28,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:20:28,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:20:28,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 02:20:28,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 313 transitions, 3755 flow. Second operand has 7 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:28,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:28,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 02:20:28,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:30,726 INFO L130 PetriNetUnfolder]: 6734/13269 cut-off events. [2023-08-30 02:20:30,726 INFO L131 PetriNetUnfolder]: For 42780/42780 co-relation queries the response was YES. [2023-08-30 02:20:30,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60981 conditions, 13269 events. 6734/13269 cut-off events. For 42780/42780 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 96270 event pairs, 2316 based on Foata normal form. 76/13214 useless extension candidates. Maximal degree in co-relation 60924. Up to 7635 conditions per place. [2023-08-30 02:20:30,903 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 323 selfloop transitions, 74 changer transitions 0/397 dead transitions. [2023-08-30 02:20:30,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 397 transitions, 5195 flow [2023-08-30 02:20:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:20:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:20:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1077 transitions. [2023-08-30 02:20:30,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4705111402359109 [2023-08-30 02:20:30,906 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1077 transitions. [2023-08-30 02:20:30,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1077 transitions. [2023-08-30 02:20:30,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:30,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1077 transitions. [2023-08-30 02:20:30,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.85714285714286) internal successors, (1077), 7 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:30,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:30,912 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:30,912 INFO L175 Difference]: Start difference. First operand has 203 places, 313 transitions, 3755 flow. Second operand 7 states and 1077 transitions. [2023-08-30 02:20:30,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 397 transitions, 5195 flow [2023-08-30 02:20:31,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 397 transitions, 4519 flow, removed 196 selfloop flow, removed 16 redundant places. [2023-08-30 02:20:31,285 INFO L231 Difference]: Finished difference. Result has 197 places, 314 transitions, 3419 flow [2023-08-30 02:20:31,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2996, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3419, PETRI_PLACES=197, PETRI_TRANSITIONS=314} [2023-08-30 02:20:31,286 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 149 predicate places. [2023-08-30 02:20:31,286 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 314 transitions, 3419 flow [2023-08-30 02:20:31,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:31,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:31,287 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-08-30 02:20:31,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 02:20:31,287 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:31,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1366491074, now seen corresponding path program 2 times [2023-08-30 02:20:31,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:31,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398842578] [2023-08-30 02:20:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:31,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:32,289 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 02:20:32,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398842578] [2023-08-30 02:20:32,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398842578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850855941] [2023-08-30 02:20:32,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:20:32,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:32,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:32,290 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 02:20:32,292 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 02:20:32,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:20:32,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:20:32,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 02:20:32,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:32,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:32,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:32,428 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:20:32,428 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 02:20:32,444 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 02:20:32,445 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 02:20:32,893 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 02:20:32,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:33,247 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 02:20:33,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850855941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:33,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:33,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 9] total 40 [2023-08-30 02:20:33,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890546091] [2023-08-30 02:20:33,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:33,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 02:20:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 02:20:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 02:20:36,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-30 02:20:36,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 314 transitions, 3419 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 02:20:36,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:36,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-30 02:20:36,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:41,485 INFO L130 PetriNetUnfolder]: 9424/18567 cut-off events. [2023-08-30 02:20:41,485 INFO L131 PetriNetUnfolder]: For 56609/56609 co-relation queries the response was YES. [2023-08-30 02:20:41,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82085 conditions, 18567 events. 9424/18567 cut-off events. For 56609/56609 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 135589 event pairs, 2920 based on Foata normal form. 234/18494 useless extension candidates. Maximal degree in co-relation 82028. Up to 10753 conditions per place. [2023-08-30 02:20:41,674 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 594 selfloop transitions, 136 changer transitions 0/730 dead transitions. [2023-08-30 02:20:41,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 730 transitions, 8164 flow [2023-08-30 02:20:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 02:20:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 02:20:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4375 transitions. [2023-08-30 02:20:41,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445973496432212 [2023-08-30 02:20:41,678 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4375 transitions. [2023-08-30 02:20:41,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4375 transitions. [2023-08-30 02:20:41,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:41,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4375 transitions. [2023-08-30 02:20:41,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 145.83333333333334) internal successors, (4375), 30 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:41,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 327.0) internal successors, (10137), 31 states have internal predecessors, (10137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:41,690 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 327.0) internal successors, (10137), 31 states have internal predecessors, (10137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:41,690 INFO L175 Difference]: Start difference. First operand has 197 places, 314 transitions, 3419 flow. Second operand 30 states and 4375 transitions. [2023-08-30 02:20:41,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 730 transitions, 8164 flow [2023-08-30 02:20:42,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 730 transitions, 8126 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:42,062 INFO L231 Difference]: Finished difference. Result has 237 places, 399 transitions, 4929 flow [2023-08-30 02:20:42,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4929, PETRI_PLACES=237, PETRI_TRANSITIONS=399} [2023-08-30 02:20:42,063 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 189 predicate places. [2023-08-30 02:20:42,063 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 399 transitions, 4929 flow [2023-08-30 02:20:42,064 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 02:20:42,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:42,064 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 02:20:42,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 02:20:42,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 02:20:42,270 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 02:20:42,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 732416370, now seen corresponding path program 4 times [2023-08-30 02:20:42,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:42,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890358498] [2023-08-30 02:20:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:42,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:44,216 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 02:20:44,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:44,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890358498] [2023-08-30 02:20:44,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890358498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:44,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513220845] [2023-08-30 02:20:44,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 02:20:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:44,217 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 02:20:44,219 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 02:20:44,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 02:20:44,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:20:44,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-30 02:20:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:44,330 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 02:20:44,330 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 02:20:44,742 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 02:20:44,817 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 02:20:45,381 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 02:20:45,473 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 02:20:45,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:46,046 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_646 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_646) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-30 02:20:46,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:20:46,056 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 02:20:46,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:20:46,070 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 02:20:46,073 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 02:20:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:20:46,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513220845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:46,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:46,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 14] total 50 [2023-08-30 02:20:46,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402873850] [2023-08-30 02:20:46,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:46,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-08-30 02:20:46,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-08-30 02:20:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2359, Unknown=1, NotChecked=98, Total=2652 [2023-08-30 02:20:46,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-30 02:20:46,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 399 transitions, 4929 flow. Second operand has 52 states, 52 states have (on average 88.61538461538461) internal successors, (4608), 52 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:46,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:46,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-30 02:20:46,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:11,291 INFO L130 PetriNetUnfolder]: 11673/23042 cut-off events. [2023-08-30 02:21:11,291 INFO L131 PetriNetUnfolder]: For 80460/80460 co-relation queries the response was YES. [2023-08-30 02:21:11,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105262 conditions, 23042 events. 11673/23042 cut-off events. For 80460/80460 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 178448 event pairs, 1492 based on Foata normal form. 90/22754 useless extension candidates. Maximal degree in co-relation 105193. Up to 5172 conditions per place. [2023-08-30 02:21:11,502 INFO L137 encePairwiseOnDemand]: 308/327 looper letters, 442 selfloop transitions, 552 changer transitions 0/994 dead transitions. [2023-08-30 02:21:11,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 994 transitions, 11042 flow [2023-08-30 02:21:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-30 02:21:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-30 02:21:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 8609 transitions. [2023-08-30 02:21:11,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28308835618690603 [2023-08-30 02:21:11,516 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 8609 transitions. [2023-08-30 02:21:11,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 8609 transitions. [2023-08-30 02:21:11,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:11,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 8609 transitions. [2023-08-30 02:21:11,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 92.56989247311827) internal successors, (8609), 93 states have internal predecessors, (8609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 327.0) internal successors, (30738), 94 states have internal predecessors, (30738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,549 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 327.0) internal successors, (30738), 94 states have internal predecessors, (30738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:11,549 INFO L175 Difference]: Start difference. First operand has 237 places, 399 transitions, 4929 flow. Second operand 93 states and 8609 transitions. [2023-08-30 02:21:11,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 994 transitions, 11042 flow [2023-08-30 02:21:12,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 994 transitions, 10811 flow, removed 87 selfloop flow, removed 10 redundant places. [2023-08-30 02:21:12,075 INFO L231 Difference]: Finished difference. Result has 325 places, 610 transitions, 8164 flow [2023-08-30 02:21:12,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=8164, PETRI_PLACES=325, PETRI_TRANSITIONS=610} [2023-08-30 02:21:12,075 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 277 predicate places. [2023-08-30 02:21:12,075 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 610 transitions, 8164 flow [2023-08-30 02:21:12,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 88.61538461538461) internal successors, (4608), 52 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:12,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:12,076 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 02:21:12,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 02:21:12,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:12,282 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:12,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:12,282 INFO L85 PathProgramCache]: Analyzing trace with hash -894263952, now seen corresponding path program 2 times [2023-08-30 02:21:12,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:12,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873673511] [2023-08-30 02:21:12,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:12,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:12,842 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 02:21:12,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:12,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873673511] [2023-08-30 02:21:12,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873673511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:12,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743575730] [2023-08-30 02:21:12,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:21:12,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:12,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:12,857 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 02:21:12,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 02:21:12,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:21:12,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:21:12,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 02:21:12,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:12,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:21:12,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:21:12,993 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:21:12,993 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 02:21:13,015 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-30 02:21:13,015 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 39 [2023-08-30 02:21:13,439 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 02:21:13,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:13,811 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 02:21:13,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743575730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:13,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:21:13,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 39 [2023-08-30 02:21:13,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171771965] [2023-08-30 02:21:13,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:13,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 02:21:13,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:13,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 02:21:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 02:21:17,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-30 02:21:17,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 610 transitions, 8164 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 02:21:17,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:17,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-30 02:21:17,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:25,102 INFO L130 PetriNetUnfolder]: 13677/27010 cut-off events. [2023-08-30 02:21:25,102 INFO L131 PetriNetUnfolder]: For 99442/99442 co-relation queries the response was YES. [2023-08-30 02:21:25,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131079 conditions, 27010 events. 13677/27010 cut-off events. For 99442/99442 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 216428 event pairs, 3488 based on Foata normal form. 80/26684 useless extension candidates. Maximal degree in co-relation 131003. Up to 15132 conditions per place. [2023-08-30 02:21:25,449 INFO L137 encePairwiseOnDemand]: 313/327 looper letters, 808 selfloop transitions, 171 changer transitions 0/979 dead transitions. [2023-08-30 02:21:25,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 979 transitions, 13381 flow [2023-08-30 02:21:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 02:21:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 02:21:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3956 transitions. [2023-08-30 02:21:25,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171675630074871 [2023-08-30 02:21:25,453 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3956 transitions. [2023-08-30 02:21:25,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3956 transitions. [2023-08-30 02:21:25,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:25,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3956 transitions. [2023-08-30 02:21:25,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 136.41379310344828) internal successors, (3956), 29 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:25,462 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 02:21:25,462 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 02:21:25,463 INFO L175 Difference]: Start difference. First operand has 325 places, 610 transitions, 8164 flow. Second operand 29 states and 3956 transitions. [2023-08-30 02:21:25,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 979 transitions, 13381 flow [2023-08-30 02:21:26,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 979 transitions, 12180 flow, removed 383 selfloop flow, removed 31 redundant places. [2023-08-30 02:21:26,366 INFO L231 Difference]: Finished difference. Result has 334 places, 688 transitions, 8828 flow [2023-08-30 02:21:26,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8828, PETRI_PLACES=334, PETRI_TRANSITIONS=688} [2023-08-30 02:21:26,367 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 286 predicate places. [2023-08-30 02:21:26,367 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 688 transitions, 8828 flow [2023-08-30 02:21:26,368 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 02:21:26,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:26,368 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 02:21:26,378 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 02:21:26,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:26,574 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:26,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:26,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2078093252, now seen corresponding path program 2 times [2023-08-30 02:21:26,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:26,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626674252] [2023-08-30 02:21:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:26,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:26,615 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 02:21:26,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:26,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626674252] [2023-08-30 02:21:26,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626674252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:26,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887756127] [2023-08-30 02:21:26,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:21:26,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:26,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:26,617 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 02:21:26,619 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 02:21:26,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 02:21:26,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:21:26,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 02:21:26,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:26,873 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 02:21:26,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:21:26,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887756127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:26,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 02:21:26,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-30 02:21:26,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230591773] [2023-08-30 02:21:26,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:26,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:21:26,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:21:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:21:26,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 327 [2023-08-30 02:21:26,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 688 transitions, 8828 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 02:21:26,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:26,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 327 [2023-08-30 02:21:26,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:32,350 INFO L130 PetriNetUnfolder]: 12187/25177 cut-off events. [2023-08-30 02:21:32,351 INFO L131 PetriNetUnfolder]: For 87484/87591 co-relation queries the response was YES. [2023-08-30 02:21:32,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118785 conditions, 25177 events. 12187/25177 cut-off events. For 87484/87591 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 209923 event pairs, 9819 based on Foata normal form. 90/24798 useless extension candidates. Maximal degree in co-relation 118707. Up to 23802 conditions per place. [2023-08-30 02:21:32,846 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 574 selfloop transitions, 1 changer transitions 1/676 dead transitions. [2023-08-30 02:21:32,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 676 transitions, 9902 flow [2023-08-30 02:21:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:21:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:21:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-30 02:21:32,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47604485219164117 [2023-08-30 02:21:32,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-30 02:21:32,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-30 02:21:32,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:32,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-30 02:21:32,849 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 02:21:32,850 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 02:21:32,850 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 02:21:32,851 INFO L175 Difference]: Start difference. First operand has 334 places, 688 transitions, 8828 flow. Second operand 3 states and 467 transitions. [2023-08-30 02:21:32,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 676 transitions, 9902 flow [2023-08-30 02:21:33,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 676 transitions, 9795 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-30 02:21:33,739 INFO L231 Difference]: Finished difference. Result has 314 places, 675 transitions, 8642 flow [2023-08-30 02:21:33,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=8643, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8642, PETRI_PLACES=314, PETRI_TRANSITIONS=675} [2023-08-30 02:21:33,740 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 266 predicate places. [2023-08-30 02:21:33,740 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 675 transitions, 8642 flow [2023-08-30 02:21:33,740 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 02:21:33,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:33,741 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 02:21:33,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 02:21:33,945 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,SelfDestructingSolverStorable25 [2023-08-30 02:21:33,945 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:33,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1972717191, now seen corresponding path program 1 times [2023-08-30 02:21:33,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:21:33,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842450656] [2023-08-30 02:21:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:33,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:21:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:34,686 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 02:21:34,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:21:34,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842450656] [2023-08-30 02:21:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842450656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:21:34,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923692068] [2023-08-30 02:21:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:34,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:21:34,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:21:34,688 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 02:21:34,689 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 02:21:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:34,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-30 02:21:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:35,008 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 02:21:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:21:35,428 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 02:21:35,967 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 02:21:36,059 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 02:21:36,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:36,839 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 02:21:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:21:37,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923692068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:37,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:21:37,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 58 [2023-08-30 02:21:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699038721] [2023-08-30 02:21:37,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:37,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 02:21:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:21:37,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 02:21:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3215, Unknown=0, NotChecked=0, Total=3422 [2023-08-30 02:21:39,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:21:41,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:21:45,501 WARN L539 Checker$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 02:21:50,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:21:52,484 WARN L539 Checker$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 02:21:55,971 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 02:21:56,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 327 [2023-08-30 02:21:56,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 675 transitions, 8642 flow. Second operand has 59 states, 59 states have (on average 119.83050847457628) internal successors, (7070), 59 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:21:56,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:56,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 327 [2023-08-30 02:21:56,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:22:44,694 INFO L130 PetriNetUnfolder]: 22290/43807 cut-off events. [2023-08-30 02:22:44,694 INFO L131 PetriNetUnfolder]: For 147048/147048 co-relation queries the response was YES. [2023-08-30 02:22:45,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205161 conditions, 43807 events. 22290/43807 cut-off events. For 147048/147048 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 383948 event pairs, 3812 based on Foata normal form. 284/43567 useless extension candidates. Maximal degree in co-relation 205082. Up to 8549 conditions per place. [2023-08-30 02:22:45,335 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 666 selfloop transitions, 1185 changer transitions 127/1978 dead transitions. [2023-08-30 02:22:45,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1978 transitions, 23977 flow [2023-08-30 02:22:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-08-30 02:22:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2023-08-30 02:22:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 22279 transitions. [2023-08-30 02:22:45,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37641711862402216 [2023-08-30 02:22:45,353 INFO L72 ComplementDD]: Start complementDD. Operand 181 states and 22279 transitions. [2023-08-30 02:22:45,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 181 states and 22279 transitions. [2023-08-30 02:22:45,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:22:45,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 181 states and 22279 transitions. [2023-08-30 02:22:45,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 182 states, 181 states have (on average 123.08839779005525) internal successors, (22279), 181 states have internal predecessors, (22279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:45,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 182 states, 182 states have (on average 327.0) internal successors, (59514), 182 states have internal predecessors, (59514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:45,427 INFO L81 ComplementDD]: Finished complementDD. Result has 182 states, 182 states have (on average 327.0) internal successors, (59514), 182 states have internal predecessors, (59514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:45,428 INFO L175 Difference]: Start difference. First operand has 314 places, 675 transitions, 8642 flow. Second operand 181 states and 22279 transitions. [2023-08-30 02:22:45,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1978 transitions, 23977 flow [2023-08-30 02:22:46,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1978 transitions, 23972 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 02:22:47,009 INFO L231 Difference]: Finished difference. Result has 505 places, 1297 transitions, 19351 flow [2023-08-30 02:22:47,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=8639, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=181, PETRI_FLOW=19351, PETRI_PLACES=505, PETRI_TRANSITIONS=1297} [2023-08-30 02:22:47,011 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 457 predicate places. [2023-08-30 02:22:47,011 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1297 transitions, 19351 flow [2023-08-30 02:22:47,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 119.83050847457628) internal successors, (7070), 59 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:47,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:22:47,012 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 02:22:47,022 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 02:22:47,219 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,SelfDestructingSolverStorable26 [2023-08-30 02:22:47,220 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 02:22:47,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:22:47,220 INFO L85 PathProgramCache]: Analyzing trace with hash 796650369, now seen corresponding path program 2 times [2023-08-30 02:22:47,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:22:47,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960805172] [2023-08-30 02:22:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:22:47,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:22:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:22:48,734 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 02:22:48,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:22:48,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960805172] [2023-08-30 02:22:48,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960805172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:22:48,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502891500] [2023-08-30 02:22:48,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:22:48,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:22:48,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:22:48,736 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 02:22:48,740 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 02:22:48,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:22:48,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:22:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-30 02:22:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:22:48,870 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 02:22:48,870 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 02:22:49,112 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 02:22:49,172 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 02:22:49,572 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 02:22:50,403 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 02:22:50,404 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 02:22:50,477 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 02:22:50,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:22:52,635 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_930 (Array Int Int)) (v_~top~0_90 Int)) (or (<= v_~top~0_90 0) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_930) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* v_~top~0_90 4) (- 4))) 4294967296) 4294967294)) (< (+ c_~top~0 1) v_~top~0_90))) is different from false [2023-08-30 02:22:52,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:22:52,646 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 30 treesize of output 31 [2023-08-30 02:22:52,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:22:52,654 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 51 treesize of output 54 [2023-08-30 02:22:52,659 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 29 treesize of output 22 [2023-08-30 02:22:53,012 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 02:22:53,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502891500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:22:53,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:22:53,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 21] total 67 [2023-08-30 02:22:53,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000851736] [2023-08-30 02:22:53,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:22:53,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-30 02:22:53,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:22:53,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-30 02:22:53,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=4162, Unknown=1, NotChecked=132, Total=4692 [2023-08-30 02:22:53,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-30 02:22:53,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1297 transitions, 19351 flow. Second operand has 69 states, 69 states have (on average 88.56521739130434) internal successors, (6111), 69 states have internal predecessors, (6111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:22:53,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:22:53,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-30 02:22:53,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:23:05,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:09,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:11,418 WARN L539 Checker$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 02:23:13,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:16,953 WARN L539 Checker$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 02:23:23,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:29,887 WARN L539 Checker$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 02:23:31,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:33,902 WARN L539 Checker$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 02:23:37,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:49,410 WARN L539 Checker$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 02:23:51,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:53,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:55,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:23:57,590 WARN L539 Checker$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 02:23:59,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:24:05,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:24:08,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:24:10,864 WARN L539 Checker$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 02:24:21,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:24:23,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:24:30,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:24:37,597 WARN L539 Checker$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 02:24:41,751 INFO L130 PetriNetUnfolder]: 26436/51803 cut-off events. [2023-08-30 02:24:41,751 INFO L131 PetriNetUnfolder]: For 210581/210581 co-relation queries the response was YES. [2023-08-30 02:24:42,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265495 conditions, 51803 events. 26436/51803 cut-off events. For 210581/210581 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 460859 event pairs, 6118 based on Foata normal form. 44/51247 useless extension candidates. Maximal degree in co-relation 265403. Up to 25993 conditions per place. [2023-08-30 02:24:42,570 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 1424 selfloop transitions, 724 changer transitions 165/2313 dead transitions. [2023-08-30 02:24:42,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 2313 transitions, 34614 flow [2023-08-30 02:24:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-08-30 02:24:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-08-30 02:24:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 8600 transitions. [2023-08-30 02:24:42,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2858662411913309 [2023-08-30 02:24:42,604 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 8600 transitions. [2023-08-30 02:24:42,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 8600 transitions. [2023-08-30 02:24:42,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:24:42,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 8600 transitions. [2023-08-30 02:24:42,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 93.47826086956522) internal successors, (8600), 92 states have internal predecessors, (8600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:42,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 327.0) internal successors, (30411), 93 states have internal predecessors, (30411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:42,643 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 327.0) internal successors, (30411), 93 states have internal predecessors, (30411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:42,644 INFO L175 Difference]: Start difference. First operand has 505 places, 1297 transitions, 19351 flow. Second operand 92 states and 8600 transitions. [2023-08-30 02:24:42,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 2313 transitions, 34614 flow [2023-08-30 02:24:46,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 2313 transitions, 32926 flow, removed 494 selfloop flow, removed 30 redundant places. [2023-08-30 02:24:46,217 INFO L231 Difference]: Finished difference. Result has 590 places, 1734 transitions, 26317 flow [2023-08-30 02:24:46,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=18180, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=26317, PETRI_PLACES=590, PETRI_TRANSITIONS=1734} [2023-08-30 02:24:46,219 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 542 predicate places. [2023-08-30 02:24:46,219 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 1734 transitions, 26317 flow [2023-08-30 02:24:46,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 88.56521739130434) internal successors, (6111), 69 states have internal predecessors, (6111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:46,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:24:46,220 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 02:24:46,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 02:24:46,423 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,SelfDestructingSolverStorable27 [2023-08-30 02:24:46,423 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 02:24:46,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:24:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1510973619, now seen corresponding path program 3 times [2023-08-30 02:24:46,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:24:46,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440361522] [2023-08-30 02:24:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:24:46,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:24:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:24:47,575 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 02:24:47,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:24:47,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440361522] [2023-08-30 02:24:47,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440361522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:24:47,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380839671] [2023-08-30 02:24:47,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 02:24:47,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:24:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:24:47,577 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 02:24:47,581 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 02:24:47,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 02:24:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:24:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 96 conjunts are in the unsatisfiable core [2023-08-30 02:24:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:24:47,806 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 02:24:47,806 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 02:24:48,060 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 02:24:48,404 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 02:24:48,561 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 02:24:49,237 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 02:24:49,238 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 02:24:49,332 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 02:24:49,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:24:50,678 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse0 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (< (+ .cse0 |c_~#arr~0.offset|) 4) (not (= (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4)) v_ArrVal_1002) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294))))) is different from false [2023-08-30 02:24:52,863 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse0 (* v_~top~0_94 4))) (or (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4) 4) v_ArrVal_1002) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296))) (< (+ c_~top~0 1) v_~top~0_94) (< (+ .cse0 |c_~#arr~0.offset|) 4)))) is different from false [2023-08-30 02:24:52,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:24:52,878 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 38 treesize of output 39 [2023-08-30 02:24:52,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:24:52,890 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 67 treesize of output 71 [2023-08-30 02:24:52,894 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 02:24:52,896 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 44 treesize of output 37 [2023-08-30 02:24:52,910 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 10 treesize of output 4 [2023-08-30 02:24:52,914 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 02:24:52,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:24:52,920 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 44 treesize of output 48 [2023-08-30 02:24:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 02:24:53,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380839671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:24:53,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:24:53,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 66 [2023-08-30 02:24:53,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705772335] [2023-08-30 02:24:53,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:24:53,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-08-30 02:24:53,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:24:53,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-08-30 02:24:53,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=3923, Unknown=13, NotChecked=258, Total=4556 [2023-08-30 02:24:53,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-30 02:24:53,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 1734 transitions, 26317 flow. Second operand has 68 states, 68 states have (on average 88.58823529411765) internal successors, (6024), 68 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:24:53,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:24:53,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-30 02:24:53,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:15,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:25:18,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:25:22,163 WARN L539 Checker$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 02:25:26,513 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~top~0 4))) (let ((.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base|)) (.cse1 (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| .cse5))) (and (forall ((v_ArrVal_1002 Int) (v_~top~0_94 Int)) (let ((.cse2 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse0 .cse1 v_ArrVal_1002)) |c_~#arr~0.base|) (+ .cse2 |c_~#arr~0.offset| (- 4))) 4294967296))) (< (+ .cse2 |c_~#arr~0.offset|) 4)))) (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse3 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (< (+ .cse3 |c_~#arr~0.offset|) 4) (not (= 4294967294 (mod (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000))) (store .cse4 |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select .cse4 |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_#in~stack#1.offset| .cse5) v_ArrVal_1002))) |c_~#arr~0.base|) (+ .cse3 |c_~#arr~0.offset| (- 4))) 4294967296)))))) (forall ((v_ArrVal_1002 Int) (v_~top~0_94 Int)) (let ((.cse6 (* v_~top~0_94 4))) (or (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse0 (+ (* |c_t1Thread1of1ForFork1_push_#t~ret34#1| 4) |c_t1Thread1of1ForFork1_push_~stack#1.offset|) v_ArrVal_1002)) |c_~#arr~0.base|) (+ .cse6 |c_~#arr~0.offset| (- 4))) 4294967296))) (< c_~top~0 v_~top~0_94) (< (+ .cse6 |c_~#arr~0.offset|) 4)))) (or (< (+ |c_t2Thread1of1ForFork0_pop_~stack#1.offset| .cse5) 4) (not (= 4294967294 (mod (select (select |c_#memory_int| |c_t2Thread1of1ForFork0_pop_~stack#1.base|) (+ |c_t2Thread1of1ForFork0_pop_~stack#1.offset| (- 4) .cse5)) 4294967296)))) (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse7 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (< (+ .cse7 |c_~#arr~0.offset|) 4) (not (= 4294967294 (mod (select (select (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000))) (store .cse8 |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select .cse8 |c_t1Thread1of1ForFork1_push_~stack#1.base|) .cse1 v_ArrVal_1002))) |c_~#arr~0.base|) (+ .cse7 |c_~#arr~0.offset| (- 4))) 4294967296)))))) (or (not (= (mod (select (select |c_#memory_int| |c_t2Thread1of1ForFork0_pop_#in~stack#1.base|) (+ |c_t2Thread1of1ForFork0_pop_#in~stack#1.offset| (- 4) .cse5)) 4294967296) 4294967294)) (< (+ |c_t2Thread1of1ForFork0_pop_#in~stack#1.offset| .cse5) 4))))) is different from false [2023-08-30 02:25:28,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:25:51,133 INFO L130 PetriNetUnfolder]: 30337/59738 cut-off events. [2023-08-30 02:25:51,133 INFO L131 PetriNetUnfolder]: For 273553/273553 co-relation queries the response was YES. [2023-08-30 02:25:52,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312052 conditions, 59738 events. 30337/59738 cut-off events. For 273553/273553 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 545491 event pairs, 11713 based on Foata normal form. 26/58863 useless extension candidates. Maximal degree in co-relation 311942. Up to 46298 conditions per place. [2023-08-30 02:25:53,037 INFO L137 encePairwiseOnDemand]: 302/327 looper letters, 1993 selfloop transitions, 442 changer transitions 123/2558 dead transitions. [2023-08-30 02:25:53,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 2558 transitions, 40487 flow [2023-08-30 02:25:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-30 02:25:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-30 02:25:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 7361 transitions. [2023-08-30 02:25:53,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28494561220144776 [2023-08-30 02:25:53,049 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 7361 transitions. [2023-08-30 02:25:53,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 7361 transitions. [2023-08-30 02:25:53,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:53,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 7361 transitions. [2023-08-30 02:25:53,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 93.17721518987342) internal successors, (7361), 79 states have internal predecessors, (7361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:53,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 327.0) internal successors, (26160), 80 states have internal predecessors, (26160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:53,074 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 327.0) internal successors, (26160), 80 states have internal predecessors, (26160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:53,074 INFO L175 Difference]: Start difference. First operand has 590 places, 1734 transitions, 26317 flow. Second operand 79 states and 7361 transitions. [2023-08-30 02:25:53,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 2558 transitions, 40487 flow [2023-08-30 02:25:58,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 2558 transitions, 39976 flow, removed 223 selfloop flow, removed 10 redundant places. [2023-08-30 02:25:58,825 INFO L231 Difference]: Finished difference. Result has 690 places, 2008 transitions, 31365 flow [2023-08-30 02:25:58,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=25978, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=31365, PETRI_PLACES=690, PETRI_TRANSITIONS=2008} [2023-08-30 02:25:58,827 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 642 predicate places. [2023-08-30 02:25:58,827 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 2008 transitions, 31365 flow [2023-08-30 02:25:58,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 88.58823529411765) internal successors, (6024), 68 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:58,828 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 02:25:58,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 02:25:59,033 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,SelfDestructingSolverStorable28 [2023-08-30 02:25:59,033 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:25:59,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1892552667, now seen corresponding path program 4 times [2023-08-30 02:25:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:59,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301672073] [2023-08-30 02:25:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:59,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:00,266 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 02:26:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301672073] [2023-08-30 02:26:00,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301672073] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:26:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291143934] [2023-08-30 02:26:00,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 02:26:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:26:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:26:00,268 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 02:26:00,270 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 02:26:00,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 02:26:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:26:00,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-30 02:26:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:26:00,412 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 02:26:00,412 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 02:26:00,703 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 02:26:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:26:01,347 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 62 treesize of output 37 [2023-08-30 02:26:01,669 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 02:26:02,547 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 02:26:02,548 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 02:26:02,633 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 02:26:02,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:26:03,897 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-08-30 02:26:03,898 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 2 case distinctions, treesize of input 54 treesize of output 62 [2023-08-30 02:26:03,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:26:03,905 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 68 treesize of output 71 [2023-08-30 02:26:03,908 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 02:26:04,424 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 02:26:04,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291143934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:26:04,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:26:04,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 70 [2023-08-30 02:26:04,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100097961] [2023-08-30 02:26:04,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:26:04,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-08-30 02:26:04,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:04,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-08-30 02:26:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=4745, Unknown=22, NotChecked=0, Total=5112 [2023-08-30 02:26:05,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 327 [2023-08-30 02:26:05,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 2008 transitions, 31365 flow. Second operand has 72 states, 72 states have (on average 82.5) internal successors, (5940), 72 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:05,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:05,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 327 [2023-08-30 02:26:05,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:46,551 INFO L130 PetriNetUnfolder]: 28202/56029 cut-off events. [2023-08-30 02:26:46,552 INFO L131 PetriNetUnfolder]: For 516024/516024 co-relation queries the response was YES. [2023-08-30 02:26:48,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383204 conditions, 56029 events. 28202/56029 cut-off events. For 516024/516024 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 510952 event pairs, 8543 based on Foata normal form. 475/55759 useless extension candidates. Maximal degree in co-relation 383066. Up to 31532 conditions per place. [2023-08-30 02:26:48,719 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 1237 selfloop transitions, 823 changer transitions 82/2142 dead transitions. [2023-08-30 02:26:48,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 2142 transitions, 36393 flow [2023-08-30 02:26:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 02:26:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 02:26:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5555 transitions. [2023-08-30 02:26:48,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26543386850152906 [2023-08-30 02:26:48,725 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5555 transitions. [2023-08-30 02:26:48,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5555 transitions. [2023-08-30 02:26:48,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:48,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5555 transitions. [2023-08-30 02:26:48,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 86.796875) internal successors, (5555), 64 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:48,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 327.0) internal successors, (21255), 65 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:48,744 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 327.0) internal successors, (21255), 65 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:48,744 INFO L175 Difference]: Start difference. First operand has 690 places, 2008 transitions, 31365 flow. Second operand 64 states and 5555 transitions. [2023-08-30 02:26:48,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 2142 transitions, 36393 flow [2023-08-30 02:26:54,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 2142 transitions, 35662 flow, removed 169 selfloop flow, removed 31 redundant places. [2023-08-30 02:26:54,651 INFO L231 Difference]: Finished difference. Result has 724 places, 1891 transitions, 31921 flow [2023-08-30 02:26:54,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=26968, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=697, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=31921, PETRI_PLACES=724, PETRI_TRANSITIONS=1891} [2023-08-30 02:26:54,652 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 676 predicate places. [2023-08-30 02:26:54,652 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 1891 transitions, 31921 flow [2023-08-30 02:26:54,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 82.5) internal successors, (5940), 72 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:54,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:54,653 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:26:54,660 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 02:26:54,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:26:54,858 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 02:26:54,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:54,859 INFO L85 PathProgramCache]: Analyzing trace with hash -956500555, now seen corresponding path program 2 times [2023-08-30 02:26:54,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:54,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907478553] [2023-08-30 02:26:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:54,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:26:55,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:55,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907478553] [2023-08-30 02:26:55,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907478553] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:26:55,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415028837] [2023-08-30 02:26:55,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:26:55,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:26:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:26:55,026 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 02:26:55,027 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 02:26:55,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:26:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:26:55,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 02:26:55,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:26:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:26:55,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:26:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:26:55,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415028837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:26:55,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:26:55,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-08-30 02:26:55,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644557971] [2023-08-30 02:26:55,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:26:55,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 02:26:55,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 02:26:55,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-30 02:26:55,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-30 02:26:55,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 1891 transitions, 31921 flow. Second operand has 22 states, 22 states have (on average 142.04545454545453) internal successors, (3125), 22 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:55,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:55,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-30 02:26:55,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:27:25,629 INFO L130 PetriNetUnfolder]: 30382/60279 cut-off events. [2023-08-30 02:27:25,630 INFO L131 PetriNetUnfolder]: For 642648/642648 co-relation queries the response was YES. [2023-08-30 02:27:28,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431625 conditions, 60279 events. 30382/60279 cut-off events. For 642648/642648 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 548284 event pairs, 7752 based on Foata normal form. 260/59908 useless extension candidates. Maximal degree in co-relation 431471. Up to 26761 conditions per place. [2023-08-30 02:27:28,270 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 1442 selfloop transitions, 1087 changer transitions 9/2538 dead transitions. [2023-08-30 02:27:28,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 2538 transitions, 46688 flow [2023-08-30 02:27:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 02:27:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 02:27:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3972 transitions. [2023-08-30 02:27:28,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44988107373428476 [2023-08-30 02:27:28,274 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3972 transitions. [2023-08-30 02:27:28,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3972 transitions. [2023-08-30 02:27:28,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:27:28,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3972 transitions. [2023-08-30 02:27:28,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 147.11111111111111) internal successors, (3972), 27 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:28,440 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 02:27:28,441 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 02:27:28,441 INFO L175 Difference]: Start difference. First operand has 724 places, 1891 transitions, 31921 flow. Second operand 27 states and 3972 transitions. [2023-08-30 02:27:28,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 2538 transitions, 46688 flow [2023-08-30 02:27:36,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 2538 transitions, 44849 flow, removed 231 selfloop flow, removed 46 redundant places. [2023-08-30 02:27:36,156 INFO L231 Difference]: Finished difference. Result has 703 places, 1971 transitions, 35528 flow [2023-08-30 02:27:36,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=29089, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=887, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=35528, PETRI_PLACES=703, PETRI_TRANSITIONS=1971} [2023-08-30 02:27:36,158 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 655 predicate places. [2023-08-30 02:27:36,158 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 1971 transitions, 35528 flow [2023-08-30 02:27:36,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 142.04545454545453) internal successors, (3125), 22 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:36,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:27:36,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:27:36,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 02:27:36,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 02:27:36,361 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:27:36,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:27:36,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2073502669, now seen corresponding path program 5 times [2023-08-30 02:27:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:27:36,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024150302] [2023-08-30 02:27:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:27:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:27:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:27:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:27:37,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:27:37,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024150302] [2023-08-30 02:27:37,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024150302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:27:37,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633799337] [2023-08-30 02:27:37,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 02:27:37,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:27:37,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:27:37,602 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 02:27:37,603 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 02:27:37,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 02:27:37,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:27:37,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-30 02:27:37,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:27:37,748 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:27:37,748 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 02:27:38,093 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 02:27:38,172 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:27:38,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 40 treesize of output 40 [2023-08-30 02:27:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:27:38,755 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 61 treesize of output 48 [2023-08-30 02:27:40,048 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 02:27:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:27:40,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:27:44,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:27:44,031 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 02:27:44,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:27:44,041 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 02:27:44,045 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 02:27:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:27:44,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633799337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:27:44,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:27:44,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 77 [2023-08-30 02:27:44,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401052530] [2023-08-30 02:27:44,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:27:44,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-08-30 02:27:44,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:27:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-08-30 02:27:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=5865, Unknown=1, NotChecked=0, Total=6162 [2023-08-30 02:27:48,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:27:52,662 WARN L539 Checker$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 02:27:53,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-30 02:27:53,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 1971 transitions, 35528 flow. Second operand has 79 states, 79 states have (on average 88.63291139240506) internal successors, (7002), 79 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:53,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:27:53,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-30 02:27:53,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:28:03,773 WARN L222 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 139 DAG size of output: 135 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 02:28:14,019 WARN L222 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 117 DAG size of output: 113 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 02:28:17,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 02:29:04,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 02:29:06,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 02:29:09,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 02:29:35,436 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 02:30:15,202 INFO L130 PetriNetUnfolder]: 39837/78777 cut-off events. [2023-08-30 02:30:15,202 INFO L131 PetriNetUnfolder]: For 827211/827211 co-relation queries the response was YES. [2023-08-30 02:30:18,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568658 conditions, 78777 events. 39837/78777 cut-off events. For 827211/827211 co-relation queries the response was YES. Maximal size of possible extension queue 1427. Compared 742961 event pairs, 10320 based on Foata normal form. 144/78167 useless extension candidates. Maximal degree in co-relation 568506. Up to 37078 conditions per place. [2023-08-30 02:30:18,632 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 1980 selfloop transitions, 1269 changer transitions 75/3324 dead transitions. [2023-08-30 02:30:18,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 3324 transitions, 60281 flow [2023-08-30 02:30:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-08-30 02:30:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2023-08-30 02:30:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 13721 transitions. [2023-08-30 02:30:18,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2835151665426895 [2023-08-30 02:30:18,659 INFO L72 ComplementDD]: Start complementDD. Operand 148 states and 13721 transitions. [2023-08-30 02:30:18,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 148 states and 13721 transitions. [2023-08-30 02:30:18,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:30:18,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 148 states and 13721 transitions. [2023-08-30 02:30:18,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 149 states, 148 states have (on average 92.70945945945945) internal successors, (13721), 148 states have internal predecessors, (13721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:18,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 149 states, 149 states have (on average 327.0) internal successors, (48723), 149 states have internal predecessors, (48723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:18,739 INFO L81 ComplementDD]: Finished complementDD. Result has 149 states, 149 states have (on average 327.0) internal successors, (48723), 149 states have internal predecessors, (48723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:18,740 INFO L175 Difference]: Start difference. First operand has 703 places, 1971 transitions, 35528 flow. Second operand 148 states and 13721 transitions. [2023-08-30 02:30:18,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 3324 transitions, 60281 flow [2023-08-30 02:30:34,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 3324 transitions, 58480 flow, removed 361 selfloop flow, removed 12 redundant places. [2023-08-30 02:30:34,598 INFO L231 Difference]: Finished difference. Result has 918 places, 2611 transitions, 50032 flow [2023-08-30 02:30:34,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=34269, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=705, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=148, PETRI_FLOW=50032, PETRI_PLACES=918, PETRI_TRANSITIONS=2611} [2023-08-30 02:30:34,600 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 870 predicate places. [2023-08-30 02:30:34,600 INFO L495 AbstractCegarLoop]: Abstraction has has 918 places, 2611 transitions, 50032 flow [2023-08-30 02:30:34,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 88.63291139240506) internal successors, (7002), 79 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:34,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:30:34,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:30:34,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 02:30:34,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:30:34,808 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 02:30:34,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:30:34,808 INFO L85 PathProgramCache]: Analyzing trace with hash -86159361, now seen corresponding path program 6 times [2023-08-30 02:30:34,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:30:34,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645432197] [2023-08-30 02:30:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:30:34,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:30:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:30:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:30:36,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:30:36,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645432197] [2023-08-30 02:30:36,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645432197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:30:36,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025981111] [2023-08-30 02:30:36,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 02:30:36,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:30:36,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:30:36,336 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 02:30:36,337 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 02:30:36,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 02:30:36,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:30:36,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-30 02:30:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:30:36,586 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 02:30:36,586 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 02:30:36,965 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 02:30:37,433 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 02:30:37,649 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-08-30 02:30:37,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 53 treesize of output 48 [2023-08-30 02:30:38,625 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 02:30:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:30:38,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:30:39,622 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1312 (Array Int Int)) (|t1Thread1of1ForFork1_push_~stack#1.offset| Int) (|t1Thread1of1ForFork1_push_#t~ret34#1| Int)) (not (= (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1312))) (store .cse0 |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select .cse0 |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ |t1Thread1of1ForFork1_push_~stack#1.offset| (* |t1Thread1of1ForFork1_push_#t~ret34#1| 4)) |c_t1Thread1of1ForFork1_push_#in~x#1|))) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-30 02:30:40,051 WARN L839 $PredicateComparison]: unable to prove that (forall ((|aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| Int) (v_ArrVal_1312 (Array Int Int)) (|t1Thread1of1ForFork1_push_~stack#1.offset| Int) (|t1Thread1of1ForFork1_push_#t~ret34#1| Int)) (or (< |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| 0) (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1312) |c_~#arr~0.base|) (+ |t1Thread1of1ForFork1_push_~stack#1.offset| (* |t1Thread1of1ForFork1_push_#t~ret34#1| 4)) (mod |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| 4294967296)) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296))) (<= 400 |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53|))) is different from false [2023-08-30 02:30:40,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:30:40,066 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 38 treesize of output 39 [2023-08-30 02:30:40,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:30:40,076 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 67 treesize of output 71 [2023-08-30 02:30:40,081 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 75 treesize of output 69 [2023-08-30 02:30:40,103 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 10 treesize of output 4 [2023-08-30 02:30:40,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:30:40,113 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 107 treesize of output 111 [2023-08-30 02:30:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 17 refuted. 4 times theorem prover too weak. 1 trivial. 4 not checked. [2023-08-30 02:30:41,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025981111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:30:41,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:30:41,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 20] total 65 [2023-08-30 02:30:41,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623614254] [2023-08-30 02:30:41,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:30:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-08-30 02:30:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:30:41,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-08-30 02:30:41,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3907, Unknown=42, NotChecked=254, Total=4422 [2023-08-30 02:30:42,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-30 02:30:42,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 918 places, 2611 transitions, 50032 flow. Second operand has 67 states, 67 states have (on average 88.92537313432835) internal successors, (5958), 67 states have internal predecessors, (5958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:42,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:30:42,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-30 02:30:42,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:30:52,530 WARN L222 SmtUtils]: Spent 10.26s on a formula simplification. DAG size of input: 93 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 02:31:00,146 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 02:31:33,063 WARN L222 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 132 DAG size of output: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 02:32:24,409 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] Killed by 15