./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.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 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:23:00,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:23:00,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:23:00,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:23:00,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:23:00,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:23:00,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:23:00,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:23:00,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:23:00,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:23:00,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:23:00,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:23:00,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:23:00,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:23:00,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:23:00,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:23:00,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:23:00,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:23:00,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:23:00,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:23:00,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:23:00,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:23:00,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:23:00,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:23:00,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:23:00,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:23:00,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:23:00,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:23:00,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:23:00,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:23:00,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:23:00,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:23:00,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:23:00,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:23:00,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:23:00,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:23:00,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:23:00,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:23:00,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:23:00,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:23:00,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:23:00,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:23:00,656 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:23:00,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:23:00,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:23:00,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:23:00,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:23:00,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:23:00,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:23:00,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:23:00,659 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:23:00,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:23:00,660 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:23:00,660 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:23:00,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:23:00,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:23:00,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:23:00,661 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:23:00,661 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:23:00,661 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:23:00,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:23:00,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:23:00,661 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:23:00,661 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:23:00,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:23:00,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:23:00,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:23:00,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:23:00,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:23:00,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:23:00,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:23:00,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:23:00,663 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:23:00,663 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:23:00,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:23:00,663 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:23:00,663 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:23:00,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:23:00,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:23:00,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:23:00,914 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:23:00,915 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:23:00,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-31 22:23:01,864 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:23:02,067 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:23:02,068 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-31 22:23:02,075 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84a5e7139/d3c0657abb974ff4a740aed11ed6a2d9/FLAG40c1d0e6f [2023-08-31 22:23:02,084 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84a5e7139/d3c0657abb974ff4a740aed11ed6a2d9 [2023-08-31 22:23:02,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:23:02,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:23:02,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:23:02,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:23:02,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:23:02,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e62658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02, skipping insertion in model container [2023-08-31 22:23:02,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:23:02,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:23:02,320 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/triangular-longer-1.i[30961,30974] [2023-08-31 22:23:02,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:23:02,330 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:23:02,366 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/triangular-longer-1.i[30961,30974] [2023-08-31 22:23:02,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:23:02,420 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:23:02,421 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:23:02,425 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:23:02,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02 WrapperNode [2023-08-31 22:23:02,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:23:02,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:23:02,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:23:02,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:23:02,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,451 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-08-31 22:23:02,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:23:02,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:23:02,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:23:02,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:23:02,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,465 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:23:02,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:23:02,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:23:02,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:23:02,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (1/1) ... [2023-08-31 22:23:02,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:23:02,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:02,505 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) [2023-08-31 22:23:02,526 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 [2023-08-31 22:23:02,533 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:23:02,534 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:23:02,534 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:23:02,534 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:23:02,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:23:02,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 22:23:02,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:23:02,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:23:02,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:23:02,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:23:02,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 22:23:02,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:23:02,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:23:02,536 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:23:02,612 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:23:02,613 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:23:02,716 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:23:02,720 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:23:02,720 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:23:02,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:02 BoogieIcfgContainer [2023-08-31 22:23:02,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:23:02,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:23:02,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:23:02,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:23:02,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:23:02" (1/3) ... [2023-08-31 22:23:02,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25859585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:23:02, skipping insertion in model container [2023-08-31 22:23:02,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:02" (2/3) ... [2023-08-31 22:23:02,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25859585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:23:02, skipping insertion in model container [2023-08-31 22:23:02,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:02" (3/3) ... [2023-08-31 22:23:02,727 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2023-08-31 22:23:02,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:23:02,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-31 22:23:02,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:23:02,810 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:23:02,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 74 transitions, 158 flow [2023-08-31 22:23:02,875 INFO L130 PetriNetUnfolder]: 5/72 cut-off events. [2023-08-31 22:23:02,876 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:02,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 72 events. 5/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-08-31 22:23:02,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 74 transitions, 158 flow [2023-08-31 22:23:02,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 150 flow [2023-08-31 22:23:02,888 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:23:02,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 72 transitions, 150 flow [2023-08-31 22:23:02,909 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 72 transitions, 150 flow [2023-08-31 22:23:02,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 72 transitions, 150 flow [2023-08-31 22:23:02,924 INFO L130 PetriNetUnfolder]: 5/72 cut-off events. [2023-08-31 22:23:02,927 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:02,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 72 events. 5/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-08-31 22:23:02,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 1254 [2023-08-31 22:23:04,856 INFO L134 LiptonReduction]: Checked pairs total: 1104 [2023-08-31 22:23:04,856 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-08-31 22:23:04,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:23:04,869 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;@2d7082cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:23:04,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-31 22:23:04,871 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:23:04,871 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:04,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:04,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:23:04,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:04,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:04,875 INFO L85 PathProgramCache]: Analyzing trace with hash 294, now seen corresponding path program 1 times [2023-08-31 22:23:04,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:04,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79904322] [2023-08-31 22:23:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:04,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:04,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:04,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79904322] [2023-08-31 22:23:04,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79904322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:04,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:04,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:23:04,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199043293] [2023-08-31 22:23:04,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:04,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:23:04,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:04,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:23:04,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:23:04,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-08-31 22:23:04,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 46 flow. Second operand has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:04,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:04,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-08-31 22:23:04,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:05,010 INFO L130 PetriNetUnfolder]: 112/179 cut-off events. [2023-08-31 22:23:05,010 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 22:23:05,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 179 events. 112/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 457 event pairs, 72 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 360. Up to 180 conditions per place. [2023-08-31 22:23:05,012 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2023-08-31 22:23:05,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-08-31 22:23:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:23:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:23:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2023-08-31 22:23:05,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-08-31 22:23:05,021 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2023-08-31 22:23:05,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2023-08-31 22:23:05,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:05,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2023-08-31 22:23:05,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,028 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,029 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 46 flow. Second operand 2 states and 156 transitions. [2023-08-31 22:23:05,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-08-31 22:23:05,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:23:05,032 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 36 flow [2023-08-31 22:23:05,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=21, PETRI_TRANSITIONS=16} [2023-08-31 22:23:05,035 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:23:05,036 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 36 flow [2023-08-31 22:23:05,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:05,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:23:05,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:23:05,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:05,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:05,037 INFO L85 PathProgramCache]: Analyzing trace with hash 286821, now seen corresponding path program 1 times [2023-08-31 22:23:05,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:05,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27412160] [2023-08-31 22:23:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:05,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:05,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:05,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27412160] [2023-08-31 22:23:05,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27412160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:05,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:05,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:23:05,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068100113] [2023-08-31 22:23:05,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:05,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:23:05,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:23:05,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:23:05,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 144 [2023-08-31 22:23:05,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:05,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 144 [2023-08-31 22:23:05,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:05,281 INFO L130 PetriNetUnfolder]: 91/146 cut-off events. [2023-08-31 22:23:05,282 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:05,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 146 events. 91/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 348 event pairs, 46 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 300. Up to 119 conditions per place. [2023-08-31 22:23:05,283 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-31 22:23:05,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 88 flow [2023-08-31 22:23:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:23:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:23:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2023-08-31 22:23:05,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2023-08-31 22:23:05,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2023-08-31 22:23:05,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2023-08-31 22:23:05,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:05,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2023-08-31 22:23:05,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,298 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 36 flow. Second operand 3 states and 214 transitions. [2023-08-31 22:23:05,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 88 flow [2023-08-31 22:23:05,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:23:05,299 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 38 flow [2023-08-31 22:23:05,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-31 22:23:05,300 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:23:05,300 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 38 flow [2023-08-31 22:23:05,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:05,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:23:05,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:23:05,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:05,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:05,303 INFO L85 PathProgramCache]: Analyzing trace with hash 286820, now seen corresponding path program 1 times [2023-08-31 22:23:05,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:05,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518076517] [2023-08-31 22:23:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:05,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:05,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:05,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518076517] [2023-08-31 22:23:05,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518076517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:05,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:05,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:23:05,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352814141] [2023-08-31 22:23:05,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:05,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:23:05,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:05,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:23:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:23:05,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:05,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:05,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:05,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:05,418 INFO L130 PetriNetUnfolder]: 88/140 cut-off events. [2023-08-31 22:23:05,419 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:05,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 140 events. 88/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 325 event pairs, 32 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 298. Up to 86 conditions per place. [2023-08-31 22:23:05,421 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-31 22:23:05,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 88 flow [2023-08-31 22:23:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:23:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:23:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-08-31 22:23:05,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-08-31 22:23:05,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-08-31 22:23:05,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-08-31 22:23:05,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:05,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-08-31 22:23:05,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,426 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 38 flow. Second operand 3 states and 204 transitions. [2023-08-31 22:23:05,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 88 flow [2023-08-31 22:23:05,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:23:05,427 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-31 22:23:05,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-31 22:23:05,428 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -4 predicate places. [2023-08-31 22:23:05,430 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-31 22:23:05,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:05,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:23:05,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:23:05,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:05,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash -45115990, now seen corresponding path program 1 times [2023-08-31 22:23:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:05,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059624795] [2023-08-31 22:23:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:05,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:05,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:05,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059624795] [2023-08-31 22:23:05,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059624795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:05,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:05,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:23:05,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826288099] [2023-08-31 22:23:05,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:05,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:23:05,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:05,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:23:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:23:05,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:05,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:05,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:05,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:05,568 INFO L130 PetriNetUnfolder]: 176/281 cut-off events. [2023-08-31 22:23:05,568 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-31 22:23:05,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 281 events. 176/281 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 876 event pairs, 12 based on Foata normal form. 15/223 useless extension candidates. Maximal degree in co-relation 598. Up to 128 conditions per place. [2023-08-31 22:23:05,570 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 31 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-08-31 22:23:05,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 170 flow [2023-08-31 22:23:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:23:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:23:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 351 transitions. [2023-08-31 22:23:05,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-08-31 22:23:05,571 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 351 transitions. [2023-08-31 22:23:05,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 351 transitions. [2023-08-31 22:23:05,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:05,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 351 transitions. [2023-08-31 22:23:05,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,573 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,574 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 5 states and 351 transitions. [2023-08-31 22:23:05,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 170 flow [2023-08-31 22:23:05,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:23:05,575 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 92 flow [2023-08-31 22:23:05,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-08-31 22:23:05,576 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-08-31 22:23:05,576 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 92 flow [2023-08-31 22:23:05,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:05,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:05,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:23:05,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:05,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:05,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1398595235, now seen corresponding path program 1 times [2023-08-31 22:23:05,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:05,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633810055] [2023-08-31 22:23:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:05,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:05,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:05,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633810055] [2023-08-31 22:23:05,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633810055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:05,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:05,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:23:05,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421728234] [2023-08-31 22:23:05,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:05,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:23:05,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:23:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:23:05,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2023-08-31 22:23:05,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:05,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2023-08-31 22:23:05,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:05,743 INFO L130 PetriNetUnfolder]: 130/212 cut-off events. [2023-08-31 22:23:05,743 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2023-08-31 22:23:05,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 212 events. 130/212 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 613 event pairs, 47 based on Foata normal form. 23/235 useless extension candidates. Maximal degree in co-relation 611. Up to 143 conditions per place. [2023-08-31 22:23:05,745 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 17 selfloop transitions, 1 changer transitions 11/29 dead transitions. [2023-08-31 22:23:05,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 184 flow [2023-08-31 22:23:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:23:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:23:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 256 transitions. [2023-08-31 22:23:05,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-31 22:23:05,746 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 256 transitions. [2023-08-31 22:23:05,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 256 transitions. [2023-08-31 22:23:05,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:05,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 256 transitions. [2023-08-31 22:23:05,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,748 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,748 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 92 flow. Second operand 4 states and 256 transitions. [2023-08-31 22:23:05,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 184 flow [2023-08-31 22:23:05,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 184 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:23:05,750 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 82 flow [2023-08-31 22:23:05,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-08-31 22:23:05,751 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 4 predicate places. [2023-08-31 22:23:05,751 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 82 flow [2023-08-31 22:23:05,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:05,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:05,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:23:05,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:05,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1179996120, now seen corresponding path program 1 times [2023-08-31 22:23:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:05,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722292491] [2023-08-31 22:23:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:05,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:05,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722292491] [2023-08-31 22:23:05,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722292491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:05,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:05,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:05,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052558998] [2023-08-31 22:23:05,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:05,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:05,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:05,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:05,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:05,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:05,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 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) [2023-08-31 22:23:05,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:05,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:05,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:05,885 INFO L130 PetriNetUnfolder]: 92/157 cut-off events. [2023-08-31 22:23:05,885 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-31 22:23:05,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 157 events. 92/157 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 433 event pairs, 19 based on Foata normal form. 6/163 useless extension candidates. Maximal degree in co-relation 450. Up to 61 conditions per place. [2023-08-31 22:23:05,886 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 20 selfloop transitions, 8 changer transitions 2/30 dead transitions. [2023-08-31 22:23:05,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 30 transitions, 180 flow [2023-08-31 22:23:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:23:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:23:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2023-08-31 22:23:05,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670138888888889 [2023-08-31 22:23:05,887 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 269 transitions. [2023-08-31 22:23:05,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 269 transitions. [2023-08-31 22:23:05,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:05,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 269 transitions. [2023-08-31 22:23:05,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,889 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:05,889 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 82 flow. Second operand 4 states and 269 transitions. [2023-08-31 22:23:05,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 30 transitions, 180 flow [2023-08-31 22:23:05,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 30 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:23:05,891 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 120 flow [2023-08-31 22:23:05,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-08-31 22:23:05,893 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2023-08-31 22:23:05,893 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 120 flow [2023-08-31 22:23:05,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 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) [2023-08-31 22:23:05,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:05,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:05,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:23:05,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:05,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:05,894 INFO L85 PathProgramCache]: Analyzing trace with hash -407213147, now seen corresponding path program 1 times [2023-08-31 22:23:05,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:05,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810934725] [2023-08-31 22:23:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:05,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:05,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810934725] [2023-08-31 22:23:05,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810934725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:05,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794355442] [2023-08-31 22:23:05,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:05,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:05,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:05,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 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) [2023-08-31 22:23:05,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:05,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:05,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:06,037 INFO L130 PetriNetUnfolder]: 132/229 cut-off events. [2023-08-31 22:23:06,038 INFO L131 PetriNetUnfolder]: For 288/288 co-relation queries the response was YES. [2023-08-31 22:23:06,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 229 events. 132/229 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 720 event pairs, 23 based on Foata normal form. 10/239 useless extension candidates. Maximal degree in co-relation 749. Up to 101 conditions per place. [2023-08-31 22:23:06,039 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 34 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2023-08-31 22:23:06,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 302 flow [2023-08-31 22:23:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:23:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:23:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 404 transitions. [2023-08-31 22:23:06,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2023-08-31 22:23:06,040 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 404 transitions. [2023-08-31 22:23:06,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 404 transitions. [2023-08-31 22:23:06,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:06,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 404 transitions. [2023-08-31 22:23:06,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.33333333333333) internal successors, (404), 6 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,053 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,053 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 120 flow. Second operand 6 states and 404 transitions. [2023-08-31 22:23:06,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 302 flow [2023-08-31 22:23:06,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 45 transitions, 286 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-31 22:23:06,055 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 204 flow [2023-08-31 22:23:06,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-31 22:23:06,055 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 13 predicate places. [2023-08-31 22:23:06,056 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 204 flow [2023-08-31 22:23:06,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 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) [2023-08-31 22:23:06,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:06,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:06,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:23:06,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:06,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash -407195477, now seen corresponding path program 2 times [2023-08-31 22:23:06,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:06,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598275001] [2023-08-31 22:23:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:06,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:06,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598275001] [2023-08-31 22:23:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598275001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:06,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:06,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:06,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037537917] [2023-08-31 22:23:06,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:06,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:06,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:06,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:06,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 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) [2023-08-31 22:23:06,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:06,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:06,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:06,184 INFO L130 PetriNetUnfolder]: 114/199 cut-off events. [2023-08-31 22:23:06,184 INFO L131 PetriNetUnfolder]: For 482/482 co-relation queries the response was YES. [2023-08-31 22:23:06,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 199 events. 114/199 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 617 event pairs, 23 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 762. Up to 84 conditions per place. [2023-08-31 22:23:06,185 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 29 selfloop transitions, 11 changer transitions 4/44 dead transitions. [2023-08-31 22:23:06,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 350 flow [2023-08-31 22:23:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:23:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:23:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2023-08-31 22:23:06,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2023-08-31 22:23:06,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 338 transitions. [2023-08-31 22:23:06,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 338 transitions. [2023-08-31 22:23:06,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:06,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 338 transitions. [2023-08-31 22:23:06,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,188 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 204 flow. Second operand 5 states and 338 transitions. [2023-08-31 22:23:06,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 350 flow [2023-08-31 22:23:06,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 336 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-31 22:23:06,191 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 237 flow [2023-08-31 22:23:06,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2023-08-31 22:23:06,191 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 19 predicate places. [2023-08-31 22:23:06,191 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 237 flow [2023-08-31 22:23:06,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 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) [2023-08-31 22:23:06,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:06,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:06,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:23:06,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:06,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1802518163, now seen corresponding path program 1 times [2023-08-31 22:23:06,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:06,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561436079] [2023-08-31 22:23:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:06,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:06,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:06,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561436079] [2023-08-31 22:23:06,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561436079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:06,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:06,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:06,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598360524] [2023-08-31 22:23:06,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:06,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:06,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:06,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:06,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 29 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:06,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:06,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:06,338 INFO L130 PetriNetUnfolder]: 150/263 cut-off events. [2023-08-31 22:23:06,338 INFO L131 PetriNetUnfolder]: For 1045/1045 co-relation queries the response was YES. [2023-08-31 22:23:06,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 263 events. 150/263 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 858 event pairs, 20 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 1079. Up to 73 conditions per place. [2023-08-31 22:23:06,340 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 35 selfloop transitions, 20 changer transitions 3/58 dead transitions. [2023-08-31 22:23:06,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 497 flow [2023-08-31 22:23:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 22:23:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 22:23:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-08-31 22:23:06,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-08-31 22:23:06,341 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-08-31 22:23:06,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-08-31 22:23:06,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:06,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-08-31 22:23:06,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.75) internal successors, (534), 8 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 144.0) internal successors, (1296), 9 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,344 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 144.0) internal successors, (1296), 9 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,344 INFO L175 Difference]: Start difference. First operand has 43 places, 29 transitions, 237 flow. Second operand 8 states and 534 transitions. [2023-08-31 22:23:06,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 497 flow [2023-08-31 22:23:06,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 458 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-31 22:23:06,347 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 337 flow [2023-08-31 22:23:06,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-31 22:23:06,348 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 26 predicate places. [2023-08-31 22:23:06,348 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 337 flow [2023-08-31 22:23:06,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:06,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:23:06,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:06,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:06,349 INFO L85 PathProgramCache]: Analyzing trace with hash -105307223, now seen corresponding path program 2 times [2023-08-31 22:23:06,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:06,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676617420] [2023-08-31 22:23:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:06,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:06,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:06,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676617420] [2023-08-31 22:23:06,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676617420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:06,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:06,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021289229] [2023-08-31 22:23:06,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:06,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:06,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:06,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:06,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:06,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:06,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:06,511 INFO L130 PetriNetUnfolder]: 138/243 cut-off events. [2023-08-31 22:23:06,512 INFO L131 PetriNetUnfolder]: For 1281/1281 co-relation queries the response was YES. [2023-08-31 22:23:06,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1151 conditions, 243 events. 138/243 cut-off events. For 1281/1281 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 797 event pairs, 20 based on Foata normal form. 8/251 useless extension candidates. Maximal degree in co-relation 1131. Up to 69 conditions per place. [2023-08-31 22:23:06,513 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 27 selfloop transitions, 20 changer transitions 8/55 dead transitions. [2023-08-31 22:23:06,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 553 flow [2023-08-31 22:23:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:23:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:23:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2023-08-31 22:23:06,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632936507936508 [2023-08-31 22:23:06,515 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 467 transitions. [2023-08-31 22:23:06,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 467 transitions. [2023-08-31 22:23:06,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:06,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 467 transitions. [2023-08-31 22:23:06,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.71428571428571) internal successors, (467), 7 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) [2023-08-31 22:23:06,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,517 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,517 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 337 flow. Second operand 7 states and 467 transitions. [2023-08-31 22:23:06,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 553 flow [2023-08-31 22:23:06,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 502 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-31 22:23:06,521 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 361 flow [2023-08-31 22:23:06,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=361, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2023-08-31 22:23:06,521 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 31 predicate places. [2023-08-31 22:23:06,521 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 361 flow [2023-08-31 22:23:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:06,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:06,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:23:06,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:06,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:06,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1802673473, now seen corresponding path program 3 times [2023-08-31 22:23:06,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:06,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214120056] [2023-08-31 22:23:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:06,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:06,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:06,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214120056] [2023-08-31 22:23:06,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214120056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:06,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:06,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192411680] [2023-08-31 22:23:06,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:06,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:06,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:06,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:06,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 361 flow. Second operand has 6 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:06,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:06,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:06,721 INFO L130 PetriNetUnfolder]: 150/263 cut-off events. [2023-08-31 22:23:06,722 INFO L131 PetriNetUnfolder]: For 1539/1539 co-relation queries the response was YES. [2023-08-31 22:23:06,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 263 events. 150/263 cut-off events. For 1539/1539 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 900 event pairs, 33 based on Foata normal form. 4/267 useless extension candidates. Maximal degree in co-relation 1258. Up to 130 conditions per place. [2023-08-31 22:23:06,723 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 38 selfloop transitions, 16 changer transitions 12/66 dead transitions. [2023-08-31 22:23:06,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 647 flow [2023-08-31 22:23:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:23:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:23:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 601 transitions. [2023-08-31 22:23:06,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637345679012346 [2023-08-31 22:23:06,725 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 601 transitions. [2023-08-31 22:23:06,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 601 transitions. [2023-08-31 22:23:06,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:06,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 601 transitions. [2023-08-31 22:23:06,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.77777777777777) internal successors, (601), 9 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) [2023-08-31 22:23:06,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,728 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,728 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 361 flow. Second operand 9 states and 601 transitions. [2023-08-31 22:23:06,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 647 flow [2023-08-31 22:23:06,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 597 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-31 22:23:06,732 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 402 flow [2023-08-31 22:23:06,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=402, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-31 22:23:06,733 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 36 predicate places. [2023-08-31 22:23:06,733 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 402 flow [2023-08-31 22:23:06,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:06,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:23:06,734 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:06,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash -42916511, now seen corresponding path program 4 times [2023-08-31 22:23:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:06,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164265022] [2023-08-31 22:23:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:06,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:06,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:06,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164265022] [2023-08-31 22:23:06,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164265022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:06,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327113065] [2023-08-31 22:23:06,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:23:06,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:06,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:06,791 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) [2023-08-31 22:23:06,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 22:23:06,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:23:06,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:06,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 22:23:06,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:06,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:07,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327113065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:07,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:07,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 22:23:07,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17560431] [2023-08-31 22:23:07,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:07,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:23:07,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:07,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:23:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-08-31 22:23:07,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:07,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 402 flow. Second operand has 13 states, 13 states have (on average 62.84615384615385) internal successors, (817), 13 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:07,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:07,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:07,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:07,264 INFO L130 PetriNetUnfolder]: 198/343 cut-off events. [2023-08-31 22:23:07,265 INFO L131 PetriNetUnfolder]: For 2481/2481 co-relation queries the response was YES. [2023-08-31 22:23:07,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1752 conditions, 343 events. 198/343 cut-off events. For 2481/2481 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1135 event pairs, 18 based on Foata normal form. 16/359 useless extension candidates. Maximal degree in co-relation 1728. Up to 91 conditions per place. [2023-08-31 22:23:07,267 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 34 selfloop transitions, 35 changer transitions 22/91 dead transitions. [2023-08-31 22:23:07,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 988 flow [2023-08-31 22:23:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:23:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:23:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 928 transitions. [2023-08-31 22:23:07,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-08-31 22:23:07,269 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 928 transitions. [2023-08-31 22:23:07,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 928 transitions. [2023-08-31 22:23:07,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:07,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 928 transitions. [2023-08-31 22:23:07,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 66.28571428571429) internal successors, (928), 14 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:07,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 144.0) internal successors, (2160), 15 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:07,273 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 144.0) internal successors, (2160), 15 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:07,273 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 402 flow. Second operand 14 states and 928 transitions. [2023-08-31 22:23:07,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 988 flow [2023-08-31 22:23:07,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 951 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-31 22:23:07,279 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 724 flow [2023-08-31 22:23:07,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=724, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-08-31 22:23:07,279 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 49 predicate places. [2023-08-31 22:23:07,279 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 724 flow [2023-08-31 22:23:07,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.84615384615385) internal successors, (817), 13 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:07,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:07,280 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:07,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 22:23:07,484 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,SelfDestructingSolverStorable11 [2023-08-31 22:23:07,485 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:07,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash 771926841, now seen corresponding path program 5 times [2023-08-31 22:23:07,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:07,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498103520] [2023-08-31 22:23:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:07,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:07,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:07,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498103520] [2023-08-31 22:23:07,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498103520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:07,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670832741] [2023-08-31 22:23:07,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:23:07,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:07,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:07,591 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) [2023-08-31 22:23:07,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 22:23:07,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 22:23:07,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:07,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:23:07,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:07,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:07,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670832741] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:07,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:07,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-31 22:23:07,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543528154] [2023-08-31 22:23:07,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:07,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:23:07,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:07,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:23:07,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:23:07,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:07,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 724 flow. Second operand has 16 states, 16 states have (on average 62.8125) internal successors, (1005), 16 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:07,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:07,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:07,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:08,042 INFO L130 PetriNetUnfolder]: 254/455 cut-off events. [2023-08-31 22:23:08,053 INFO L131 PetriNetUnfolder]: For 5607/5607 co-relation queries the response was YES. [2023-08-31 22:23:08,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2628 conditions, 455 events. 254/455 cut-off events. For 5607/5607 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1585 event pairs, 55 based on Foata normal form. 32/487 useless extension candidates. Maximal degree in co-relation 2599. Up to 249 conditions per place. [2023-08-31 22:23:08,055 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 65 selfloop transitions, 25 changer transitions 27/117 dead transitions. [2023-08-31 22:23:08,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 117 transitions, 1538 flow [2023-08-31 22:23:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:23:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:23:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1059 transitions. [2023-08-31 22:23:08,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596354166666667 [2023-08-31 22:23:08,058 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1059 transitions. [2023-08-31 22:23:08,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1059 transitions. [2023-08-31 22:23:08,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:08,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1059 transitions. [2023-08-31 22:23:08,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 66.1875) internal successors, (1059), 16 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:08,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 144.0) internal successors, (2448), 17 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:08,062 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 144.0) internal successors, (2448), 17 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:08,062 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 724 flow. Second operand 16 states and 1059 transitions. [2023-08-31 22:23:08,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 117 transitions, 1538 flow [2023-08-31 22:23:08,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 1161 flow, removed 175 selfloop flow, removed 5 redundant places. [2023-08-31 22:23:08,072 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 809 flow [2023-08-31 22:23:08,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=809, PETRI_PLACES=93, PETRI_TRANSITIONS=69} [2023-08-31 22:23:08,073 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 69 predicate places. [2023-08-31 22:23:08,073 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 809 flow [2023-08-31 22:23:08,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.8125) internal successors, (1005), 16 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:08,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:08,073 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:08,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:08,277 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,SelfDestructingSolverStorable12 [2023-08-31 22:23:08,278 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:08,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:08,278 INFO L85 PathProgramCache]: Analyzing trace with hash -157115917, now seen corresponding path program 6 times [2023-08-31 22:23:08,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:08,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120634108] [2023-08-31 22:23:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:08,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:08,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:08,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120634108] [2023-08-31 22:23:08,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120634108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:08,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506930954] [2023-08-31 22:23:08,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:23:08,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:08,363 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) [2023-08-31 22:23:08,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 22:23:08,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 22:23:08,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:08,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:23:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:08,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:08,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506930954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:08,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:08,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 22:23:08,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591690043] [2023-08-31 22:23:08,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:08,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 22:23:08,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 22:23:08,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-31 22:23:08,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:08,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 69 transitions, 809 flow. Second operand has 17 states, 17 states have (on average 62.8235294117647) internal successors, (1068), 17 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:08,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:08,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:08,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:08,950 INFO L130 PetriNetUnfolder]: 408/747 cut-off events. [2023-08-31 22:23:08,950 INFO L131 PetriNetUnfolder]: For 15124/15124 co-relation queries the response was YES. [2023-08-31 22:23:08,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4330 conditions, 747 events. 408/747 cut-off events. For 15124/15124 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3263 event pairs, 44 based on Foata normal form. 32/779 useless extension candidates. Maximal degree in co-relation 4292. Up to 233 conditions per place. [2023-08-31 22:23:08,954 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 73 selfloop transitions, 71 changer transitions 37/181 dead transitions. [2023-08-31 22:23:08,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 181 transitions, 2195 flow [2023-08-31 22:23:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 22:23:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 22:23:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1456 transitions. [2023-08-31 22:23:08,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2023-08-31 22:23:08,958 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1456 transitions. [2023-08-31 22:23:08,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1456 transitions. [2023-08-31 22:23:08,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:08,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1456 transitions. [2023-08-31 22:23:08,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.18181818181819) internal successors, (1456), 22 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:08,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 144.0) internal successors, (3312), 23 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:08,965 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 144.0) internal successors, (3312), 23 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:08,965 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 809 flow. Second operand 22 states and 1456 transitions. [2023-08-31 22:23:08,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 181 transitions, 2195 flow [2023-08-31 22:23:09,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 2083 flow, removed 48 selfloop flow, removed 4 redundant places. [2023-08-31 22:23:09,002 INFO L231 Difference]: Finished difference. Result has 124 places, 107 transitions, 1554 flow [2023-08-31 22:23:09,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1554, PETRI_PLACES=124, PETRI_TRANSITIONS=107} [2023-08-31 22:23:09,005 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 100 predicate places. [2023-08-31 22:23:09,005 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 107 transitions, 1554 flow [2023-08-31 22:23:09,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 62.8235294117647) internal successors, (1068), 17 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:09,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:09,006 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:09,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:09,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:09,210 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:09,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash 384037113, now seen corresponding path program 7 times [2023-08-31 22:23:09,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:09,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350835317] [2023-08-31 22:23:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:09,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:09,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:09,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350835317] [2023-08-31 22:23:09,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350835317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:09,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178926007] [2023-08-31 22:23:09,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 22:23:09,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:09,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:09,297 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) [2023-08-31 22:23:09,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 22:23:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:09,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:23:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:09,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:09,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178926007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:09,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:09,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-31 22:23:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94271101] [2023-08-31 22:23:09,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:09,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:23:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:23:09,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:23:09,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:09,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 107 transitions, 1554 flow. Second operand has 16 states, 16 states have (on average 62.8125) internal successors, (1005), 16 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:09,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:09,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:09,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:09,975 INFO L130 PetriNetUnfolder]: 632/1131 cut-off events. [2023-08-31 22:23:09,975 INFO L131 PetriNetUnfolder]: For 41181/41181 co-relation queries the response was YES. [2023-08-31 22:23:09,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8449 conditions, 1131 events. 632/1131 cut-off events. For 41181/41181 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5380 event pairs, 27 based on Foata normal form. 32/1163 useless extension candidates. Maximal degree in co-relation 8396. Up to 369 conditions per place. [2023-08-31 22:23:09,982 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 71 selfloop transitions, 133 changer transitions 46/250 dead transitions. [2023-08-31 22:23:09,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 250 transitions, 3948 flow [2023-08-31 22:23:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 22:23:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 22:23:09,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1721 transitions. [2023-08-31 22:23:09,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596688034188034 [2023-08-31 22:23:09,987 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1721 transitions. [2023-08-31 22:23:09,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1721 transitions. [2023-08-31 22:23:09,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:09,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1721 transitions. [2023-08-31 22:23:09,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.1923076923077) internal successors, (1721), 26 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:09,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 144.0) internal successors, (3888), 27 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:09,997 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 144.0) internal successors, (3888), 27 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:09,997 INFO L175 Difference]: Start difference. First operand has 124 places, 107 transitions, 1554 flow. Second operand 26 states and 1721 transitions. [2023-08-31 22:23:09,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 250 transitions, 3948 flow [2023-08-31 22:23:10,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 250 transitions, 3578 flow, removed 173 selfloop flow, removed 6 redundant places. [2023-08-31 22:23:10,059 INFO L231 Difference]: Finished difference. Result has 157 places, 161 transitions, 2716 flow [2023-08-31 22:23:10,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2716, PETRI_PLACES=157, PETRI_TRANSITIONS=161} [2023-08-31 22:23:10,060 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 133 predicate places. [2023-08-31 22:23:10,060 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 161 transitions, 2716 flow [2023-08-31 22:23:10,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.8125) internal successors, (1005), 16 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:10,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:10,061 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:10,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 22:23:10,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 22:23:10,265 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:10,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1354159795, now seen corresponding path program 8 times [2023-08-31 22:23:10,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:10,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017161139] [2023-08-31 22:23:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:10,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:10,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017161139] [2023-08-31 22:23:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017161139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861457919] [2023-08-31 22:23:10,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:10,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:10,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:10,394 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) [2023-08-31 22:23:10,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 22:23:10,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:10,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 22:23:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:10,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:10,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861457919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:10,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:10,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-31 22:23:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058356431] [2023-08-31 22:23:10,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:10,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 22:23:10,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 22:23:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-08-31 22:23:10,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:10,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 161 transitions, 2716 flow. Second operand has 25 states, 25 states have (on average 62.48) internal successors, (1562), 25 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:10,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:10,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:10,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:11,286 INFO L130 PetriNetUnfolder]: 868/1603 cut-off events. [2023-08-31 22:23:11,286 INFO L131 PetriNetUnfolder]: For 98852/98852 co-relation queries the response was YES. [2023-08-31 22:23:11,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15127 conditions, 1603 events. 868/1603 cut-off events. For 98852/98852 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8678 event pairs, 56 based on Foata normal form. 40/1643 useless extension candidates. Maximal degree in co-relation 15059. Up to 566 conditions per place. [2023-08-31 22:23:11,298 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 82 selfloop transitions, 180 changer transitions 47/309 dead transitions. [2023-08-31 22:23:11,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 309 transitions, 6865 flow [2023-08-31 22:23:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 22:23:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 22:23:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1779 transitions. [2023-08-31 22:23:11,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575617283950617 [2023-08-31 22:23:11,301 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1779 transitions. [2023-08-31 22:23:11,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1779 transitions. [2023-08-31 22:23:11,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:11,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1779 transitions. [2023-08-31 22:23:11,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.88888888888889) internal successors, (1779), 27 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:11,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:11,307 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:11,307 INFO L175 Difference]: Start difference. First operand has 157 places, 161 transitions, 2716 flow. Second operand 27 states and 1779 transitions. [2023-08-31 22:23:11,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 309 transitions, 6865 flow [2023-08-31 22:23:11,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 309 transitions, 4998 flow, removed 912 selfloop flow, removed 9 redundant places. [2023-08-31 22:23:11,473 INFO L231 Difference]: Finished difference. Result has 187 places, 226 transitions, 3907 flow [2023-08-31 22:23:11,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3907, PETRI_PLACES=187, PETRI_TRANSITIONS=226} [2023-08-31 22:23:11,473 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 163 predicate places. [2023-08-31 22:23:11,474 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 226 transitions, 3907 flow [2023-08-31 22:23:11,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.48) internal successors, (1562), 25 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:11,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:11,474 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:11,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:11,676 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,SelfDestructingSolverStorable15 [2023-08-31 22:23:11,677 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:11,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:11,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1665604867, now seen corresponding path program 9 times [2023-08-31 22:23:11,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:11,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428818726] [2023-08-31 22:23:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:11,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:11,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:11,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428818726] [2023-08-31 22:23:11,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428818726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:11,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533597704] [2023-08-31 22:23:11,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:23:11,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:11,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:11,804 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) [2023-08-31 22:23:11,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 22:23:11,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-31 22:23:11,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:11,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 22:23:11,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:11,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:12,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533597704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:12,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:12,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-31 22:23:12,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487586430] [2023-08-31 22:23:12,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:12,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 22:23:12,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:12,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 22:23:12,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-08-31 22:23:12,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:12,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 226 transitions, 3907 flow. Second operand has 25 states, 25 states have (on average 62.44) internal successors, (1561), 25 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:12,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:12,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:12,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:13,067 INFO L130 PetriNetUnfolder]: 1416/2591 cut-off events. [2023-08-31 22:23:13,067 INFO L131 PetriNetUnfolder]: For 172910/172910 co-relation queries the response was YES. [2023-08-31 22:23:13,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25113 conditions, 2591 events. 1416/2591 cut-off events. For 172910/172910 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14671 event pairs, 30 based on Foata normal form. 48/2639 useless extension candidates. Maximal degree in co-relation 25032. Up to 998 conditions per place. [2023-08-31 22:23:13,096 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 89 selfloop transitions, 325 changer transitions 74/488 dead transitions. [2023-08-31 22:23:13,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 488 transitions, 10356 flow [2023-08-31 22:23:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 22:23:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 22:23:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2643 transitions. [2023-08-31 22:23:13,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588541666666667 [2023-08-31 22:23:13,102 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2643 transitions. [2023-08-31 22:23:13,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2643 transitions. [2023-08-31 22:23:13,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:13,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2643 transitions. [2023-08-31 22:23:13,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 66.075) internal successors, (2643), 40 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:13,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 144.0) internal successors, (5904), 41 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:13,112 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 144.0) internal successors, (5904), 41 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:13,112 INFO L175 Difference]: Start difference. First operand has 187 places, 226 transitions, 3907 flow. Second operand 40 states and 2643 transitions. [2023-08-31 22:23:13,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 488 transitions, 10356 flow [2023-08-31 22:23:13,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 488 transitions, 8943 flow, removed 656 selfloop flow, removed 9 redundant places. [2023-08-31 22:23:13,410 INFO L231 Difference]: Finished difference. Result has 236 places, 378 transitions, 7698 flow [2023-08-31 22:23:13,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=7698, PETRI_PLACES=236, PETRI_TRANSITIONS=378} [2023-08-31 22:23:13,410 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 212 predicate places. [2023-08-31 22:23:13,410 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 378 transitions, 7698 flow [2023-08-31 22:23:13,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.44) internal successors, (1561), 25 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:13,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:13,411 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:13,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 22:23:13,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 22:23:13,627 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:13,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:13,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1076313209, now seen corresponding path program 10 times [2023-08-31 22:23:13,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:13,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303312389] [2023-08-31 22:23:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:13,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:13,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:13,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303312389] [2023-08-31 22:23:13,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303312389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:13,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347941223] [2023-08-31 22:23:13,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:23:13,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:13,862 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) [2023-08-31 22:23:13,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 22:23:13,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:23:13,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 22:23:13,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:13,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:14,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347941223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:14,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:14,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 26 [2023-08-31 22:23:14,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916789907] [2023-08-31 22:23:14,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:14,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 22:23:14,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:14,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 22:23:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2023-08-31 22:23:14,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:14,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 378 transitions, 7698 flow. Second operand has 28 states, 28 states have (on average 62.464285714285715) internal successors, (1749), 28 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:14,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:14,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:14,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:15,218 INFO L130 PetriNetUnfolder]: 1488/2735 cut-off events. [2023-08-31 22:23:15,218 INFO L131 PetriNetUnfolder]: For 254803/254803 co-relation queries the response was YES. [2023-08-31 22:23:15,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29542 conditions, 2735 events. 1488/2735 cut-off events. For 254803/254803 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 15592 event pairs, 573 based on Foata normal form. 32/2767 useless extension candidates. Maximal degree in co-relation 29441. Up to 2353 conditions per place. [2023-08-31 22:23:15,244 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 387 selfloop transitions, 47 changer transitions 51/485 dead transitions. [2023-08-31 22:23:15,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 485 transitions, 11076 flow [2023-08-31 22:23:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 22:23:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 22:23:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1839 transitions. [2023-08-31 22:23:15,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45610119047619047 [2023-08-31 22:23:15,246 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1839 transitions. [2023-08-31 22:23:15,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1839 transitions. [2023-08-31 22:23:15,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:15,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1839 transitions. [2023-08-31 22:23:15,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 65.67857142857143) internal successors, (1839), 28 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:15,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:15,252 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:15,252 INFO L175 Difference]: Start difference. First operand has 236 places, 378 transitions, 7698 flow. Second operand 28 states and 1839 transitions. [2023-08-31 22:23:15,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 485 transitions, 11076 flow [2023-08-31 22:23:15,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 485 transitions, 8606 flow, removed 1205 selfloop flow, removed 8 redundant places. [2023-08-31 22:23:15,833 INFO L231 Difference]: Finished difference. Result has 267 places, 396 transitions, 6573 flow [2023-08-31 22:23:15,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6573, PETRI_PLACES=267, PETRI_TRANSITIONS=396} [2023-08-31 22:23:15,834 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 243 predicate places. [2023-08-31 22:23:15,834 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 396 transitions, 6573 flow [2023-08-31 22:23:15,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 62.464285714285715) internal successors, (1749), 28 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:15,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:15,834 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:15,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:16,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:16,042 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:16,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash 763683891, now seen corresponding path program 11 times [2023-08-31 22:23:16,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:16,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642948400] [2023-08-31 22:23:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:16,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:16,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:16,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642948400] [2023-08-31 22:23:16,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642948400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:16,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721100681] [2023-08-31 22:23:16,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:23:16,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:16,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:16,301 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) [2023-08-31 22:23:16,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 22:23:16,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-08-31 22:23:16,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:16,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 22:23:16,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:16,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721100681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:16,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:16,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2023-08-31 22:23:16,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659133925] [2023-08-31 22:23:16,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 22:23:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 22:23:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2023-08-31 22:23:16,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:16,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 396 transitions, 6573 flow. Second operand has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:16,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:16,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:16,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:17,932 INFO L130 PetriNetUnfolder]: 1768/3295 cut-off events. [2023-08-31 22:23:17,932 INFO L131 PetriNetUnfolder]: For 359848/359848 co-relation queries the response was YES. [2023-08-31 22:23:17,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31643 conditions, 3295 events. 1768/3295 cut-off events. For 359848/359848 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 19506 event pairs, 426 based on Foata normal form. 32/3327 useless extension candidates. Maximal degree in co-relation 31529. Up to 1733 conditions per place. [2023-08-31 22:23:17,964 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 343 selfloop transitions, 198 changer transitions 63/604 dead transitions. [2023-08-31 22:23:17,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 604 transitions, 11084 flow [2023-08-31 22:23:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 22:23:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 22:23:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2236 transitions. [2023-08-31 22:23:17,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45669934640522875 [2023-08-31 22:23:17,967 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2236 transitions. [2023-08-31 22:23:17,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2236 transitions. [2023-08-31 22:23:17,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:17,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2236 transitions. [2023-08-31 22:23:17,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 65.76470588235294) internal successors, (2236), 34 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:17,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 144.0) internal successors, (5040), 35 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:17,973 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 144.0) internal successors, (5040), 35 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:17,973 INFO L175 Difference]: Start difference. First operand has 267 places, 396 transitions, 6573 flow. Second operand 34 states and 2236 transitions. [2023-08-31 22:23:17,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 604 transitions, 11084 flow [2023-08-31 22:23:18,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 604 transitions, 10545 flow, removed 241 selfloop flow, removed 15 redundant places. [2023-08-31 22:23:18,627 INFO L231 Difference]: Finished difference. Result has 297 places, 466 transitions, 8193 flow [2023-08-31 22:23:18,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8193, PETRI_PLACES=297, PETRI_TRANSITIONS=466} [2023-08-31 22:23:18,627 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 273 predicate places. [2023-08-31 22:23:18,627 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 466 transitions, 8193 flow [2023-08-31 22:23:18,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:18,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:18,628 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:18,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:18,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:18,828 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:18,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2072400751, now seen corresponding path program 12 times [2023-08-31 22:23:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:18,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340362096] [2023-08-31 22:23:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:19,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:19,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340362096] [2023-08-31 22:23:19,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340362096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:19,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461352662] [2023-08-31 22:23:19,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:23:19,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:19,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:19,099 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) [2023-08-31 22:23:19,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 22:23:19,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-31 22:23:19,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 22:23:19,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:19,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:19,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461352662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:19,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:19,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 30 [2023-08-31 22:23:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344675906] [2023-08-31 22:23:19,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:19,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 22:23:19,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 22:23:19,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2023-08-31 22:23:19,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:19,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 466 transitions, 8193 flow. Second operand has 32 states, 32 states have (on average 62.40625) internal successors, (1997), 32 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:19,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:19,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:19,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:21,130 INFO L130 PetriNetUnfolder]: 2332/4419 cut-off events. [2023-08-31 22:23:21,131 INFO L131 PetriNetUnfolder]: For 553516/553516 co-relation queries the response was YES. [2023-08-31 22:23:21,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45067 conditions, 4419 events. 2332/4419 cut-off events. For 553516/553516 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 28206 event pairs, 135 based on Foata normal form. 32/4451 useless extension candidates. Maximal degree in co-relation 44941. Up to 1230 conditions per place. [2023-08-31 22:23:21,173 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 197 selfloop transitions, 497 changer transitions 73/767 dead transitions. [2023-08-31 22:23:21,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 767 transitions, 15133 flow [2023-08-31 22:23:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 22:23:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 22:23:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2565 transitions. [2023-08-31 22:23:21,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2023-08-31 22:23:21,176 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2565 transitions. [2023-08-31 22:23:21,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2565 transitions. [2023-08-31 22:23:21,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:21,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2565 transitions. [2023-08-31 22:23:21,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 65.76923076923077) internal successors, (2565), 39 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:21,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 144.0) internal successors, (5760), 40 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:21,182 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 144.0) internal successors, (5760), 40 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:21,182 INFO L175 Difference]: Start difference. First operand has 297 places, 466 transitions, 8193 flow. Second operand 39 states and 2565 transitions. [2023-08-31 22:23:21,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 767 transitions, 15133 flow [2023-08-31 22:23:22,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 767 transitions, 14122 flow, removed 424 selfloop flow, removed 19 redundant places. [2023-08-31 22:23:22,456 INFO L231 Difference]: Finished difference. Result has 334 places, 616 transitions, 12066 flow [2023-08-31 22:23:22,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=7412, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=12066, PETRI_PLACES=334, PETRI_TRANSITIONS=616} [2023-08-31 22:23:22,457 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 310 predicate places. [2023-08-31 22:23:22,457 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 616 transitions, 12066 flow [2023-08-31 22:23:22,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 62.40625) internal successors, (1997), 32 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:22,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:22,457 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:22,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:22,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:22,658 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:22,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:22,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1504954729, now seen corresponding path program 13 times [2023-08-31 22:23:22,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:22,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920858168] [2023-08-31 22:23:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:22,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:22,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:22,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920858168] [2023-08-31 22:23:22,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920858168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:22,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081687485] [2023-08-31 22:23:22,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 22:23:22,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:22,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:22,888 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) [2023-08-31 22:23:22,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 22:23:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:22,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 22:23:22,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:23,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:23,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081687485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:23,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:23,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2023-08-31 22:23:23,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248738184] [2023-08-31 22:23:23,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:23,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 22:23:23,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:23,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 22:23:23,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2023-08-31 22:23:23,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:23,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 616 transitions, 12066 flow. Second operand has 35 states, 35 states have (on average 62.457142857142856) internal successors, (2186), 35 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:23,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:23,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:23,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:25,598 INFO L130 PetriNetUnfolder]: 2724/5127 cut-off events. [2023-08-31 22:23:25,598 INFO L131 PetriNetUnfolder]: For 793653/793653 co-relation queries the response was YES. [2023-08-31 22:23:25,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57506 conditions, 5127 events. 2724/5127 cut-off events. For 793653/793653 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 33377 event pairs, 36 based on Foata normal form. 32/5159 useless extension candidates. Maximal degree in co-relation 57361. Up to 1438 conditions per place. [2023-08-31 22:23:25,658 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 144 selfloop transitions, 651 changer transitions 83/878 dead transitions. [2023-08-31 22:23:25,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 878 transitions, 19212 flow [2023-08-31 22:23:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-31 22:23:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-31 22:23:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2962 transitions. [2023-08-31 22:23:25,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45709876543209876 [2023-08-31 22:23:25,661 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2962 transitions. [2023-08-31 22:23:25,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2962 transitions. [2023-08-31 22:23:25,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:25,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2962 transitions. [2023-08-31 22:23:25,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 65.82222222222222) internal successors, (2962), 45 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:25,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 144.0) internal successors, (6624), 46 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:25,669 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 144.0) internal successors, (6624), 46 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:25,669 INFO L175 Difference]: Start difference. First operand has 334 places, 616 transitions, 12066 flow. Second operand 45 states and 2962 transitions. [2023-08-31 22:23:25,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 878 transitions, 19212 flow [2023-08-31 22:23:27,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 878 transitions, 17310 flow, removed 888 selfloop flow, removed 14 redundant places. [2023-08-31 22:23:27,545 INFO L231 Difference]: Finished difference. Result has 381 places, 717 transitions, 14834 flow [2023-08-31 22:23:27,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=10788, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=14834, PETRI_PLACES=381, PETRI_TRANSITIONS=717} [2023-08-31 22:23:27,545 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 357 predicate places. [2023-08-31 22:23:27,545 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 717 transitions, 14834 flow [2023-08-31 22:23:27,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 62.457142857142856) internal successors, (2186), 35 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:27,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:27,546 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:27,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:27,750 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,SelfDestructingSolverStorable20 [2023-08-31 22:23:27,750 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:27,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash -149829581, now seen corresponding path program 14 times [2023-08-31 22:23:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:27,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174803018] [2023-08-31 22:23:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:27,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:27,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:27,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174803018] [2023-08-31 22:23:27,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174803018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:27,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020295581] [2023-08-31 22:23:27,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:27,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:27,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:27,947 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) [2023-08-31 22:23:27,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 22:23:28,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:28,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:28,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 22:23:28,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:28,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:28,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020295581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:28,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:28,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2023-08-31 22:23:28,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960789627] [2023-08-31 22:23:28,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:28,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 22:23:28,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 22:23:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2023-08-31 22:23:28,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:28,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 717 transitions, 14834 flow. Second operand has 29 states, 29 states have (on average 62.44827586206897) internal successors, (1811), 29 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) [2023-08-31 22:23:28,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:28,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:28,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:30,776 INFO L130 PetriNetUnfolder]: 2904/5431 cut-off events. [2023-08-31 22:23:30,776 INFO L131 PetriNetUnfolder]: For 973719/973719 co-relation queries the response was YES. [2023-08-31 22:23:30,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65390 conditions, 5431 events. 2904/5431 cut-off events. For 973719/973719 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 35254 event pairs, 18 based on Foata normal form. 32/5463 useless extension candidates. Maximal degree in co-relation 65229. Up to 1530 conditions per place. [2023-08-31 22:23:30,837 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 141 selfloop transitions, 710 changer transitions 91/942 dead transitions. [2023-08-31 22:23:30,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 942 transitions, 22197 flow [2023-08-31 22:23:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-31 22:23:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-31 22:23:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3425 transitions. [2023-08-31 22:23:30,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45739850427350426 [2023-08-31 22:23:30,840 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3425 transitions. [2023-08-31 22:23:30,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3425 transitions. [2023-08-31 22:23:30,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:30,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3425 transitions. [2023-08-31 22:23:30,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 65.86538461538461) internal successors, (3425), 52 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:30,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 144.0) internal successors, (7632), 53 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:30,852 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 144.0) internal successors, (7632), 53 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:30,852 INFO L175 Difference]: Start difference. First operand has 381 places, 717 transitions, 14834 flow. Second operand 52 states and 3425 transitions. [2023-08-31 22:23:30,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 942 transitions, 22197 flow [2023-08-31 22:23:33,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 942 transitions, 20659 flow, removed 635 selfloop flow, removed 19 redundant places. [2023-08-31 22:23:33,072 INFO L231 Difference]: Finished difference. Result has 429 places, 759 transitions, 16868 flow [2023-08-31 22:23:33,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=13308, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=16868, PETRI_PLACES=429, PETRI_TRANSITIONS=759} [2023-08-31 22:23:33,073 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 405 predicate places. [2023-08-31 22:23:33,073 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 759 transitions, 16868 flow [2023-08-31 22:23:33,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 62.44827586206897) internal successors, (1811), 29 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) [2023-08-31 22:23:33,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:33,073 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:33,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:33,276 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,SelfDestructingSolverStorable21 [2023-08-31 22:23:33,277 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:33,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:33,277 INFO L85 PathProgramCache]: Analyzing trace with hash 588389757, now seen corresponding path program 15 times [2023-08-31 22:23:33,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:33,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779082747] [2023-08-31 22:23:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:33,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:33,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779082747] [2023-08-31 22:23:33,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779082747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:33,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516848128] [2023-08-31 22:23:33,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:23:33,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:33,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:33,501 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) [2023-08-31 22:23:33,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 22:23:33,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-08-31 22:23:33,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 22:23:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:33,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:33,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516848128] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:33,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:33,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-31 22:23:33,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002397356] [2023-08-31 22:23:33,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:33,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 22:23:33,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:33,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 22:23:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2023-08-31 22:23:33,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:33,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 759 transitions, 16868 flow. Second operand has 25 states, 25 states have (on average 62.2) internal successors, (1555), 25 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:33,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:33,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:33,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:36,290 INFO L130 PetriNetUnfolder]: 2996/5603 cut-off events. [2023-08-31 22:23:36,291 INFO L131 PetriNetUnfolder]: For 1293938/1293938 co-relation queries the response was YES. [2023-08-31 22:23:36,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75111 conditions, 5603 events. 2996/5603 cut-off events. For 1293938/1293938 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 36219 event pairs, 78 based on Foata normal form. 8/5611 useless extension candidates. Maximal degree in co-relation 74936. Up to 1594 conditions per place. [2023-08-31 22:23:36,361 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 131 selfloop transitions, 698 changer transitions 80/909 dead transitions. [2023-08-31 22:23:36,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 909 transitions, 23206 flow [2023-08-31 22:23:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-31 22:23:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-31 22:23:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2825 transitions. [2023-08-31 22:23:36,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.456233850129199 [2023-08-31 22:23:36,365 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2825 transitions. [2023-08-31 22:23:36,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2825 transitions. [2023-08-31 22:23:36,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:36,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2825 transitions. [2023-08-31 22:23:36,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 65.69767441860465) internal successors, (2825), 43 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:36,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 144.0) internal successors, (6336), 44 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:36,373 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 144.0) internal successors, (6336), 44 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:36,373 INFO L175 Difference]: Start difference. First operand has 429 places, 759 transitions, 16868 flow. Second operand 43 states and 2825 transitions. [2023-08-31 22:23:36,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 909 transitions, 23206 flow [2023-08-31 22:23:39,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 909 transitions, 20316 flow, removed 991 selfloop flow, removed 34 redundant places. [2023-08-31 22:23:39,817 INFO L231 Difference]: Finished difference. Result has 444 places, 782 transitions, 16752 flow [2023-08-31 22:23:39,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=14650, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=675, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=16752, PETRI_PLACES=444, PETRI_TRANSITIONS=782} [2023-08-31 22:23:39,818 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 420 predicate places. [2023-08-31 22:23:39,818 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 782 transitions, 16752 flow [2023-08-31 22:23:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.2) internal successors, (1555), 25 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:39,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:39,819 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:39,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:40,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 22:23:40,023 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:40,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:40,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1087695521, now seen corresponding path program 16 times [2023-08-31 22:23:40,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:40,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321592569] [2023-08-31 22:23:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:40,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:40,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:40,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321592569] [2023-08-31 22:23:40,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321592569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:40,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724590572] [2023-08-31 22:23:40,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:23:40,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:40,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:40,133 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) [2023-08-31 22:23:40,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 22:23:40,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:23:40,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 22:23:40,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:40,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:40,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724590572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:40,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 22:23:40,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2023-08-31 22:23:40,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048056550] [2023-08-31 22:23:40,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:40,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:23:40,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:40,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:23:40,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:23:40,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 144 [2023-08-31 22:23:40,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 782 transitions, 16752 flow. Second operand has 13 states, 13 states have (on average 66.23076923076923) internal successors, (861), 13 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:40,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:40,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 144 [2023-08-31 22:23:40,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:46,611 INFO L130 PetriNetUnfolder]: 13313/21229 cut-off events. [2023-08-31 22:23:46,611 INFO L131 PetriNetUnfolder]: For 5528072/5528072 co-relation queries the response was YES. [2023-08-31 22:23:46,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264424 conditions, 21229 events. 13313/21229 cut-off events. For 5528072/5528072 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 147193 event pairs, 271 based on Foata normal form. 1224/22453 useless extension candidates. Maximal degree in co-relation 264243. Up to 10646 conditions per place. [2023-08-31 22:23:46,869 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 0 selfloop transitions, 0 changer transitions 3884/3884 dead transitions. [2023-08-31 22:23:46,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 3884 transitions, 88780 flow [2023-08-31 22:23:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 22:23:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 22:23:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 929 transitions. [2023-08-31 22:23:46,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962606837606838 [2023-08-31 22:23:46,870 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 929 transitions. [2023-08-31 22:23:46,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 929 transitions. [2023-08-31 22:23:46,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:46,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 929 transitions. [2023-08-31 22:23:46,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.46153846153847) internal successors, (929), 13 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:46,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 144.0) internal successors, (2016), 14 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:46,873 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 144.0) internal successors, (2016), 14 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:46,873 INFO L175 Difference]: Start difference. First operand has 444 places, 782 transitions, 16752 flow. Second operand 13 states and 929 transitions. [2023-08-31 22:23:46,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 3884 transitions, 88780 flow [2023-08-31 22:23:51,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 3884 transitions, 80854 flow, removed 399 selfloop flow, removed 43 redundant places. [2023-08-31 22:23:51,030 INFO L231 Difference]: Finished difference. Result has 407 places, 0 transitions, 0 flow [2023-08-31 22:23:51,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=14129, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=407, PETRI_TRANSITIONS=0} [2023-08-31 22:23:51,031 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 383 predicate places. [2023-08-31 22:23:51,031 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 0 transitions, 0 flow [2023-08-31 22:23:51,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.23076923076923) internal successors, (861), 13 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:51,033 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2023-08-31 22:23:51,033 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-31 22:23:51,033 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-31 22:23:51,033 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-31 22:23:51,033 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-31 22:23:51,034 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-31 22:23:51,034 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 8 remaining) [2023-08-31 22:23:51,034 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 8 remaining) [2023-08-31 22:23:51,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:51,238 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,SelfDestructingSolverStorable23 [2023-08-31 22:23:51,238 INFO L445 BasicCegarLoop]: Path program histogram: [16, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:51,241 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:23:51,241 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:23:51,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:23:51 BasicIcfg [2023-08-31 22:23:51,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:23:51,243 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:23:51,243 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:23:51,243 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:23:51,243 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:02" (3/4) ... [2023-08-31 22:23:51,245 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-31 22:23:51,249 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2023-08-31 22:23:51,249 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2023-08-31 22:23:51,251 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-31 22:23:51,251 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-08-31 22:23:51,251 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-31 22:23:51,251 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-31 22:23:51,270 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-31 22:23:51,271 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:23:51,271 INFO L158 Benchmark]: Toolchain (without parser) took 49184.82ms. Allocated memory was 75.5MB in the beginning and 5.9GB in the end (delta: 5.8GB). Free memory was 52.4MB in the beginning and 4.3GB in the end (delta: -4.2GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2023-08-31 22:23:51,271 INFO L158 Benchmark]: CDTParser took 3.77ms. Allocated memory is still 58.7MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:23:51,271 INFO L158 Benchmark]: CACSL2BoogieTranslator took 338.61ms. Allocated memory is still 75.5MB. Free memory was 52.3MB in the beginning and 51.5MB in the end (delta: 788.0kB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. [2023-08-31 22:23:51,272 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.34ms. Allocated memory is still 75.5MB. Free memory was 51.5MB in the beginning and 49.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:23:51,272 INFO L158 Benchmark]: Boogie Preprocessor took 15.09ms. Allocated memory is still 75.5MB. Free memory was 49.4MB in the beginning and 48.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:23:51,272 INFO L158 Benchmark]: RCFGBuilder took 254.54ms. Allocated memory is still 75.5MB. Free memory was 48.0MB in the beginning and 35.0MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-31 22:23:51,272 INFO L158 Benchmark]: TraceAbstraction took 48519.52ms. Allocated memory was 75.5MB in the beginning and 5.9GB in the end (delta: 5.8GB). Free memory was 34.2MB in the beginning and 4.3GB in the end (delta: -4.2GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2023-08-31 22:23:51,272 INFO L158 Benchmark]: Witness Printer took 27.97ms. Allocated memory is still 5.9GB. Free memory was 4.3GB in the beginning and 4.3GB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:23:51,273 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.77ms. Allocated memory is still 58.7MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 338.61ms. Allocated memory is still 75.5MB. Free memory was 52.3MB in the beginning and 51.5MB in the end (delta: 788.0kB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.34ms. Allocated memory is still 75.5MB. Free memory was 51.5MB in the beginning and 49.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.09ms. Allocated memory is still 75.5MB. Free memory was 49.4MB in the beginning and 48.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 254.54ms. Allocated memory is still 75.5MB. Free memory was 48.0MB in the beginning and 35.0MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 48519.52ms. Allocated memory was 75.5MB in the beginning and 5.9GB in the end (delta: 5.8GB). Free memory was 34.2MB in the beginning and 4.3GB in the end (delta: -4.2GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. * Witness Printer took 27.97ms. Allocated memory is still 5.9GB. Free memory was 4.3GB in the beginning and 4.3GB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 74 PlacesBefore, 24 PlacesAfterwards, 72 TransitionsBefore, 20 TransitionsAfterwards, 1254 CoEnabledTransitionPairs, 5 FixpointIterations, 27 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 70 TotalNumberOfCompositions, 1104 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 978, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 644, independent: 633, independent conditional: 0, independent unconditional: 633, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 978, independent: 319, independent conditional: 0, independent unconditional: 319, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 644, unknown conditional: 0, unknown unconditional: 644] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 722]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 711]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 92 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 48.4s, OverallIterations: 24, TraceHistogramMax: 11, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 37.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5290 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5054 mSDsluCounter, 901 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 827 mSDsCounter, 461 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6041 IncrementalHoareTripleChecker+Invalid, 6502 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 461 mSolverCounterUnsat, 74 mSDtfsCounter, 6041 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1050 GetRequests, 326 SyntacticMatches, 67 SemanticMatches, 657 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9814 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16868occurred in iteration=22, InterpolantAutomatonStates: 455, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 622 NumberOfCodeBlocks, 619 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 818 ConstructedInterpolants, 0 QuantifiedInterpolants, 3740 SizeOfPredicates, 141 NumberOfNonLiveVariables, 2274 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 49 InterpolantComputations, 12 PerfectInterpolantSequences, 217/1727 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-31 22:23:51,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE