./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longer-2.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-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 --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 22:23:02,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:23:02,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:23:02,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:23:02,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:23:02,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:23:02,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:23:02,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:23:02,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:23:02,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:23:02,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:23:02,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:23:02,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:23:02,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:23:02,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:23:02,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:23:02,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:23:02,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:23:02,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:23:02,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:23:02,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:23:02,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:23:02,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:23:02,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:23:02,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:23:02,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:23:02,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:23:02,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:23:02,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:23:02,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:23:02,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:23:02,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:23:02,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:23:02,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:23:02,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:23:02,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:23:02,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:23:02,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:23:02,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:23:02,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:23:02,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:23:02,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:23:02,216 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:23:02,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:23:02,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:23:02,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:23:02,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:23:02,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:23:02,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:23:02,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:23:02,219 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:23:02,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:23:02,221 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:23:02,221 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:23:02,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:23:02,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:23:02,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:23:02,222 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:23:02,222 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:23:02,222 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:23:02,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:23:02,222 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:23:02,223 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:23:02,223 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:23:02,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:23:02,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:23:02,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:23:02,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:23:02,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:23:02,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:23:02,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:23:02,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:23:02,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:23:02,225 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:23:02,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:23:02,225 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:23:02,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:23:02,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:23:02,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:23:02,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:23:02,546 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:23:02,546 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:23:02,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2023-08-31 22:23:03,749 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:23:04,036 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:23:04,037 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2023-08-31 22:23:04,050 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19aa3c08d/ae42a33529ce417698adbea64215c089/FLAGf6d4ac0bf [2023-08-31 22:23:04,064 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19aa3c08d/ae42a33529ce417698adbea64215c089 [2023-08-31 22:23:04,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:23:04,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:23:04,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:23:04,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:23:04,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:23:04,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd46325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04, skipping insertion in model container [2023-08-31 22:23:04,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:23:04,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:23:04,351 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-2.i[30963,30976] [2023-08-31 22:23:04,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:23:04,363 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:23:04,422 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-2.i[30963,30976] [2023-08-31 22:23:04,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:23:04,474 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:23:04,474 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:23:04,481 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:23:04,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04 WrapperNode [2023-08-31 22:23:04,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:23:04,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:23:04,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:23:04,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:23:04,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,538 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-08-31 22:23:04,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:23:04,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:23:04,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:23:04,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:23:04,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,579 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:23:04,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:23:04,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:23:04,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:23:04,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (1/1) ... [2023-08-31 22:23:04,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:23:04,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:04,622 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 22:23:04,652 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 22:23:04,669 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:23:04,669 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:23:04,669 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:23:04,669 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:23:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:23:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 22:23:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:23:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:23:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:23:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:23:04,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 22:23:04,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:23:04,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:23:04,672 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 22:23:04,820 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:23:04,822 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:23:05,013 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:23:05,018 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:23:05,019 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:23:05,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:05 BoogieIcfgContainer [2023-08-31 22:23:05,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:23:05,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:23:05,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:23:05,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:23:05,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:23:04" (1/3) ... [2023-08-31 22:23:05,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cdae1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:23:05, skipping insertion in model container [2023-08-31 22:23:05,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04" (2/3) ... [2023-08-31 22:23:05,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cdae1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:23:05, skipping insertion in model container [2023-08-31 22:23:05,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:05" (3/3) ... [2023-08-31 22:23:05,029 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2023-08-31 22:23:05,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:23:05,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-31 22:23:05,045 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:23:05,089 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:23:05,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 74 transitions, 158 flow [2023-08-31 22:23:05,153 INFO L130 PetriNetUnfolder]: 5/72 cut-off events. [2023-08-31 22:23:05,153 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:05,158 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 22:23:05,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 74 transitions, 158 flow [2023-08-31 22:23:05,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 150 flow [2023-08-31 22:23:05,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:23:05,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 72 transitions, 150 flow [2023-08-31 22:23:05,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 72 transitions, 150 flow [2023-08-31 22:23:05,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 72 transitions, 150 flow [2023-08-31 22:23:05,210 INFO L130 PetriNetUnfolder]: 5/72 cut-off events. [2023-08-31 22:23:05,211 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:05,211 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 22:23:05,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 1254 [2023-08-31 22:23:07,543 INFO L134 LiptonReduction]: Checked pairs total: 1104 [2023-08-31 22:23:07,543 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-08-31 22:23:07,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:23:07,562 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;@40bb7244, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:23:07,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-31 22:23:07,564 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:23:07,564 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:07,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:07,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:23:07,565 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 22:23:07,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:07,570 INFO L85 PathProgramCache]: Analyzing trace with hash 294, now seen corresponding path program 1 times [2023-08-31 22:23:07,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:07,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652442162] [2023-08-31 22:23:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:07,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:07,679 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 22:23:07,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:07,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652442162] [2023-08-31 22:23:07,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652442162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:07,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:07,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:23:07,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874073586] [2023-08-31 22:23:07,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:07,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:23:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:23:07,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:23:07,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-08-31 22:23:07,723 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 22:23:07,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:07,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-08-31 22:23:07,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:07,805 INFO L130 PetriNetUnfolder]: 112/179 cut-off events. [2023-08-31 22:23:07,806 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 22:23:07,808 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 22:23:07,810 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2023-08-31 22:23:07,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-08-31 22:23:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:23:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:23:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2023-08-31 22:23:07,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-08-31 22:23:07,825 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2023-08-31 22:23:07,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2023-08-31 22:23:07,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:07,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2023-08-31 22:23:07,836 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 22:23:07,840 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 22:23:07,841 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 22:23:07,842 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 46 flow. Second operand 2 states and 156 transitions. [2023-08-31 22:23:07,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-08-31 22:23:07,847 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 22:23:07,848 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 36 flow [2023-08-31 22:23:07,850 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 22:23:07,857 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:23:07,857 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 36 flow [2023-08-31 22:23:07,857 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 22:23:07,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:07,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:23:07,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:23:07,859 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 22:23:07,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:07,861 INFO L85 PathProgramCache]: Analyzing trace with hash 286821, now seen corresponding path program 1 times [2023-08-31 22:23:07,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:07,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437419090] [2023-08-31 22:23:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:07,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:08,107 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 22:23:08,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:08,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437419090] [2023-08-31 22:23:08,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437419090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:08,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:08,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:23:08,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774970135] [2023-08-31 22:23:08,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:08,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:23:08,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:23:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:23:08,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 144 [2023-08-31 22:23:08,132 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 22:23:08,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:08,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 144 [2023-08-31 22:23:08,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:08,181 INFO L130 PetriNetUnfolder]: 91/146 cut-off events. [2023-08-31 22:23:08,181 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:08,182 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 22:23:08,184 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-31 22:23:08,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 88 flow [2023-08-31 22:23:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:23:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:23:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2023-08-31 22:23:08,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2023-08-31 22:23:08,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2023-08-31 22:23:08,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2023-08-31 22:23:08,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:08,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2023-08-31 22:23:08,193 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 22:23:08,195 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 22:23:08,195 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 22:23:08,196 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 36 flow. Second operand 3 states and 214 transitions. [2023-08-31 22:23:08,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 88 flow [2023-08-31 22:23:08,196 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 22:23:08,197 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 38 flow [2023-08-31 22:23:08,198 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 22:23:08,199 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:23:08,199 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 38 flow [2023-08-31 22:23:08,199 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 22:23:08,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:08,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:23:08,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:23:08,200 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 22:23:08,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash 286820, now seen corresponding path program 1 times [2023-08-31 22:23:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:08,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834649583] [2023-08-31 22:23:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:08,261 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 22:23:08,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:08,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834649583] [2023-08-31 22:23:08,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834649583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:08,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:08,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:23:08,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843532760] [2023-08-31 22:23:08,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:08,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:23:08,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:08,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:23:08,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:23:08,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:08,288 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 22:23:08,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:08,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:08,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:08,327 INFO L130 PetriNetUnfolder]: 88/140 cut-off events. [2023-08-31 22:23:08,335 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:08,337 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 22:23:08,338 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-31 22:23:08,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 88 flow [2023-08-31 22:23:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:23:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:23:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-08-31 22:23:08,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-08-31 22:23:08,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-08-31 22:23:08,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-08-31 22:23:08,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:08,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-08-31 22:23:08,342 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 22:23:08,344 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 22:23:08,345 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 22:23:08,345 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 38 flow. Second operand 3 states and 204 transitions. [2023-08-31 22:23:08,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 88 flow [2023-08-31 22:23:08,346 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 22:23:08,347 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-31 22:23:08,347 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 22:23:08,348 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -4 predicate places. [2023-08-31 22:23:08,351 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-31 22:23:08,352 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 22:23:08,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:08,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:23:08,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:23:08,353 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 22:23:08,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:08,354 INFO L85 PathProgramCache]: Analyzing trace with hash -45115990, now seen corresponding path program 1 times [2023-08-31 22:23:08,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:08,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085710539] [2023-08-31 22:23:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:08,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:08,539 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 22:23:08,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085710539] [2023-08-31 22:23:08,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085710539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:08,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:08,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:23:08,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083492730] [2023-08-31 22:23:08,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:08,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:23:08,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:23:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:23:08,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:08,572 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 22:23:08,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:08,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:08,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:08,653 INFO L130 PetriNetUnfolder]: 124/197 cut-off events. [2023-08-31 22:23:08,656 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 22:23:08,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 197 events. 124/197 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 534 event pairs, 11 based on Foata normal form. 9/155 useless extension candidates. Maximal degree in co-relation 418. Up to 97 conditions per place. [2023-08-31 22:23:08,658 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 24 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2023-08-31 22:23:08,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 122 flow [2023-08-31 22:23:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:23:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:23:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 277 transitions. [2023-08-31 22:23:08,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809027777777778 [2023-08-31 22:23:08,660 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 277 transitions. [2023-08-31 22:23:08,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 277 transitions. [2023-08-31 22:23:08,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:08,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 277 transitions. [2023-08-31 22:23:08,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:08,667 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 22:23:08,667 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 22:23:08,667 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 4 states and 277 transitions. [2023-08-31 22:23:08,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 122 flow [2023-08-31 22:23:08,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:23:08,670 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 57 flow [2023-08-31 22:23:08,670 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=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=57, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-31 22:23:08,672 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2023-08-31 22:23:08,672 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 57 flow [2023-08-31 22:23:08,672 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 22:23:08,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:08,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:08,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:23:08,673 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 22:23:08,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:08,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1398595235, now seen corresponding path program 1 times [2023-08-31 22:23:08,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:08,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084387518] [2023-08-31 22:23:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:08,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:08,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:08,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084387518] [2023-08-31 22:23:08,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084387518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:08,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:08,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:23:08,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083523110] [2023-08-31 22:23:08,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:08,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:23:08,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:23:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:23:08,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2023-08-31 22:23:08,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 57 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 22:23:08,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:08,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2023-08-31 22:23:08,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:08,978 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-08-31 22:23:08,978 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-08-31 22:23:08,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 152 events. 94/152 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 382 event pairs, 35 based on Foata normal form. 15/148 useless extension candidates. Maximal degree in co-relation 373. Up to 107 conditions per place. [2023-08-31 22:23:08,979 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 14 selfloop transitions, 1 changer transitions 8/23 dead transitions. [2023-08-31 22:23:08,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 120 flow [2023-08-31 22:23:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:23:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:23:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 256 transitions. [2023-08-31 22:23:08,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-31 22:23:08,981 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 256 transitions. [2023-08-31 22:23:08,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 256 transitions. [2023-08-31 22:23:08,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:08,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 256 transitions. [2023-08-31 22:23:08,983 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 22:23:08,984 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 22:23:08,984 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 22:23:08,984 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 57 flow. Second operand 4 states and 256 transitions. [2023-08-31 22:23:08,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 120 flow [2023-08-31 22:23:08,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:23:08,986 INFO L231 Difference]: Finished difference. Result has 25 places, 15 transitions, 55 flow [2023-08-31 22:23:08,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2023-08-31 22:23:08,987 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-31 22:23:08,987 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 55 flow [2023-08-31 22:23:08,987 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 22:23:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:08,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:08,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:23:08,988 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 22:23:08,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash -407213147, now seen corresponding path program 1 times [2023-08-31 22:23:08,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:08,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007381948] [2023-08-31 22:23:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:08,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:09,057 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 22:23:09,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:09,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007381948] [2023-08-31 22:23:09,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007381948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:09,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:09,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:09,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94186740] [2023-08-31 22:23:09,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:09,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:09,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:09,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:09,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:09,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:09,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 55 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 22:23:09,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:09,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:09,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:09,145 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-08-31 22:23:09,146 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-31 22:23:09,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 217 events. 126/217 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 656 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 543. Up to 89 conditions per place. [2023-08-31 22:23:09,147 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-31 22:23:09,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 217 flow [2023-08-31 22:23:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:23:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:23:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 404 transitions. [2023-08-31 22:23:09,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2023-08-31 22:23:09,150 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 404 transitions. [2023-08-31 22:23:09,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 404 transitions. [2023-08-31 22:23:09,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:09,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 404 transitions. [2023-08-31 22:23:09,151 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 22:23:09,153 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 22:23:09,153 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 22:23:09,154 INFO L175 Difference]: Start difference. First operand has 25 places, 15 transitions, 55 flow. Second operand 6 states and 404 transitions. [2023-08-31 22:23:09,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 217 flow [2023-08-31 22:23:09,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:23:09,155 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 135 flow [2023-08-31 22:23:09,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=135, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-31 22:23:09,156 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2023-08-31 22:23:09,156 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 135 flow [2023-08-31 22:23:09,157 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 22:23:09,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:09,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:09,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:23:09,157 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 22:23:09,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash -407195477, now seen corresponding path program 2 times [2023-08-31 22:23:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:09,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870103268] [2023-08-31 22:23:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:09,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:09,245 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 22:23:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870103268] [2023-08-31 22:23:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870103268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:09,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:09,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:09,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6416202] [2023-08-31 22:23:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:09,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:09,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 135 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 22:23:09,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:09,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:09,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:09,335 INFO L130 PetriNetUnfolder]: 114/199 cut-off events. [2023-08-31 22:23:09,336 INFO L131 PetriNetUnfolder]: For 277/277 co-relation queries the response was YES. [2023-08-31 22:23:09,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 199 events. 114/199 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 617 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 645. Up to 84 conditions per place. [2023-08-31 22:23:09,337 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-31 22:23:09,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 285 flow [2023-08-31 22:23:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:23:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:23:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2023-08-31 22:23:09,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2023-08-31 22:23:09,339 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 338 transitions. [2023-08-31 22:23:09,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 338 transitions. [2023-08-31 22:23:09,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:09,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 338 transitions. [2023-08-31 22:23:09,340 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 22:23:09,341 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 22:23:09,342 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 22:23:09,342 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 135 flow. Second operand 5 states and 338 transitions. [2023-08-31 22:23:09,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 285 flow [2023-08-31 22:23:09,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 283 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 22:23:09,345 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 183 flow [2023-08-31 22:23:09,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-31 22:23:09,346 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 13 predicate places. [2023-08-31 22:23:09,346 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 183 flow [2023-08-31 22:23:09,346 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 22:23:09,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:09,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:09,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:23:09,347 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 22:23:09,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1802673473, now seen corresponding path program 1 times [2023-08-31 22:23:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:09,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985294768] [2023-08-31 22:23:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:09,428 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 22:23:09,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:09,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985294768] [2023-08-31 22:23:09,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985294768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:09,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177416933] [2023-08-31 22:23:09,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:09,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:09,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:09,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:09,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 183 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 22:23:09,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:09,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:09,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:09,552 INFO L130 PetriNetUnfolder]: 136/239 cut-off events. [2023-08-31 22:23:09,553 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2023-08-31 22:23:09,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 239 events. 136/239 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 787 event pairs, 31 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 852. Up to 101 conditions per place. [2023-08-31 22:23:09,554 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 30 selfloop transitions, 16 changer transitions 8/54 dead transitions. [2023-08-31 22:23:09,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 420 flow [2023-08-31 22:23:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:23:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:23:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 468 transitions. [2023-08-31 22:23:09,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-08-31 22:23:09,557 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 468 transitions. [2023-08-31 22:23:09,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 468 transitions. [2023-08-31 22:23:09,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:09,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 468 transitions. [2023-08-31 22:23:09,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:09,562 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 22:23:09,562 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 22:23:09,562 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 183 flow. Second operand 7 states and 468 transitions. [2023-08-31 22:23:09,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 420 flow [2023-08-31 22:23:09,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 380 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-31 22:23:09,568 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 270 flow [2023-08-31 22:23:09,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=270, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-08-31 22:23:09,570 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 18 predicate places. [2023-08-31 22:23:09,571 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 270 flow [2023-08-31 22:23:09,571 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 22:23:09,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:09,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:09,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:23:09,572 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 22:23:09,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1802518163, now seen corresponding path program 2 times [2023-08-31 22:23:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:09,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938649849] [2023-08-31 22:23:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:09,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:09,656 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 22:23:09,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938649849] [2023-08-31 22:23:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938649849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:09,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:09,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:09,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305311161] [2023-08-31 22:23:09,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:09,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:09,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:09,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:09,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:09,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:09,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 270 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 22:23:09,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:09,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:09,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:09,771 INFO L130 PetriNetUnfolder]: 172/303 cut-off events. [2023-08-31 22:23:09,772 INFO L131 PetriNetUnfolder]: For 778/778 co-relation queries the response was YES. [2023-08-31 22:23:09,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 303 events. 172/303 cut-off events. For 778/778 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1052 event pairs, 22 based on Foata normal form. 8/311 useless extension candidates. Maximal degree in co-relation 1137. Up to 79 conditions per place. [2023-08-31 22:23:09,774 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 38 selfloop transitions, 22 changer transitions 3/63 dead transitions. [2023-08-31 22:23:09,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 520 flow [2023-08-31 22:23:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 22:23:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 22:23:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-08-31 22:23:09,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-08-31 22:23:09,776 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-08-31 22:23:09,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-08-31 22:23:09,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:09,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-08-31 22:23:09,778 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 22:23:09,779 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 22:23:09,780 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 22:23:09,780 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 270 flow. Second operand 8 states and 534 transitions. [2023-08-31 22:23:09,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 520 flow [2023-08-31 22:23:09,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 496 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-31 22:23:09,784 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 376 flow [2023-08-31 22:23:09,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=376, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-31 22:23:09,785 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 28 predicate places. [2023-08-31 22:23:09,785 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 376 flow [2023-08-31 22:23:09,786 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 22:23:09,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:09,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:09,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:23:09,786 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 22:23:09,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash -105307223, now seen corresponding path program 3 times [2023-08-31 22:23:09,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:09,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817704669] [2023-08-31 22:23:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:09,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:09,887 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 22:23:09,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:09,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817704669] [2023-08-31 22:23:09,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817704669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:09,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:09,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:09,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10194365] [2023-08-31 22:23:09,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:09,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:09,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:09,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:09,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 376 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 22:23:09,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:09,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:09,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:10,048 INFO L130 PetriNetUnfolder]: 168/295 cut-off events. [2023-08-31 22:23:10,048 INFO L131 PetriNetUnfolder]: For 1372/1372 co-relation queries the response was YES. [2023-08-31 22:23:10,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 295 events. 168/295 cut-off events. For 1372/1372 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1031 event pairs, 18 based on Foata normal form. 8/303 useless extension candidates. Maximal degree in co-relation 1310. Up to 71 conditions per place. [2023-08-31 22:23:10,051 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 28 selfloop transitions, 27 changer transitions 10/65 dead transitions. [2023-08-31 22:23:10,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 652 flow [2023-08-31 22:23:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 22:23:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 22:23:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 533 transitions. [2023-08-31 22:23:10,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626736111111111 [2023-08-31 22:23:10,053 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 533 transitions. [2023-08-31 22:23:10,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 533 transitions. [2023-08-31 22:23:10,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:10,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 533 transitions. [2023-08-31 22:23:10,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 22:23:10,057 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 22:23:10,057 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 22:23:10,057 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 376 flow. Second operand 8 states and 533 transitions. [2023-08-31 22:23:10,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 652 flow [2023-08-31 22:23:10,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 618 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-31 22:23:10,065 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 477 flow [2023-08-31 22:23:10,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-31 22:23:10,065 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 35 predicate places. [2023-08-31 22:23:10,066 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 477 flow [2023-08-31 22:23:10,066 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 22:23:10,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:10,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:10,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:23:10,067 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 22:23:10,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:10,067 INFO L85 PathProgramCache]: Analyzing trace with hash -66003947, now seen corresponding path program 4 times [2023-08-31 22:23:10,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:10,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793312341] [2023-08-31 22:23:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:10,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:10,161 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 22:23:10,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793312341] [2023-08-31 22:23:10,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793312341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775375159] [2023-08-31 22:23:10,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:23:10,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:10,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:10,173 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 22:23:10,197 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 22:23:10,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:23:10,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:10,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 22:23:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:10,319 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 22:23:10,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:10,530 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 22:23:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775375159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:10,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:10,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 22:23:10,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091919905] [2023-08-31 22:23:10,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:10,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:23:10,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:23:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:23:10,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:10,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 477 flow. Second operand has 12 states, 12 states have (on average 62.916666666666664) internal successors, (755), 12 states have internal predecessors, (755), 0 states have call successors, (0), 0 states 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 22:23:10,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:10,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:10,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:10,745 INFO L130 PetriNetUnfolder]: 192/343 cut-off events. [2023-08-31 22:23:10,745 INFO L131 PetriNetUnfolder]: For 2696/2696 co-relation queries the response was YES. [2023-08-31 22:23:10,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 343 events. 192/343 cut-off events. For 2696/2696 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1204 event pairs, 41 based on Foata normal form. 24/367 useless extension candidates. Maximal degree in co-relation 1673. Up to 181 conditions per place. [2023-08-31 22:23:10,748 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 45 selfloop transitions, 19 changer transitions 19/83 dead transitions. [2023-08-31 22:23:10,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 917 flow [2023-08-31 22:23:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 22:23:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 22:23:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 797 transitions. [2023-08-31 22:23:10,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46122685185185186 [2023-08-31 22:23:10,752 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 797 transitions. [2023-08-31 22:23:10,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 797 transitions. [2023-08-31 22:23:10,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:10,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 797 transitions. [2023-08-31 22:23:10,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 66.41666666666667) internal successors, (797), 12 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 22:23:10,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 22:23:10,757 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 22:23:10,757 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 477 flow. Second operand 12 states and 797 transitions. [2023-08-31 22:23:10,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 917 flow [2023-08-31 22:23:10,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 862 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-31 22:23:10,769 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 587 flow [2023-08-31 22:23:10,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=587, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-31 22:23:10,769 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 47 predicate places. [2023-08-31 22:23:10,770 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 587 flow [2023-08-31 22:23:10,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.916666666666664) internal successors, (755), 12 states have internal predecessors, (755), 0 states have call successors, (0), 0 states 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 22:23:10,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:10,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:10,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:10,976 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,SelfDestructingSolverStorable10 [2023-08-31 22:23:10,976 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 22:23:10,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:10,977 INFO L85 PathProgramCache]: Analyzing trace with hash -49023077, now seen corresponding path program 5 times [2023-08-31 22:23:10,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:10,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236875440] [2023-08-31 22:23:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:10,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:11,066 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 22:23:11,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:11,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236875440] [2023-08-31 22:23:11,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236875440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:11,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607125137] [2023-08-31 22:23:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:23:11,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:11,069 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 22:23:11,094 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 22:23:11,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:11,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:11,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 22:23:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:11,202 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 22:23:11,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:11,324 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 22:23:11,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607125137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:11,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:11,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 22:23:11,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901287337] [2023-08-31 22:23:11,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:11,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:23:11,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:23:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-31 22:23:11,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:11,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 587 flow. Second operand has 13 states, 13 states have (on average 62.92307692307692) internal successors, (818), 13 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:11,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:11,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:11,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:11,724 INFO L130 PetriNetUnfolder]: 254/459 cut-off events. [2023-08-31 22:23:11,724 INFO L131 PetriNetUnfolder]: For 6978/6978 co-relation queries the response was YES. [2023-08-31 22:23:11,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 459 events. 254/459 cut-off events. For 6978/6978 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1793 event pairs, 30 based on Foata normal form. 28/487 useless extension candidates. Maximal degree in co-relation 2588. Up to 131 conditions per place. [2023-08-31 22:23:11,728 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 46 selfloop transitions, 44 changer transitions 29/119 dead transitions. [2023-08-31 22:23:11,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 119 transitions, 1454 flow [2023-08-31 22:23:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 22:23:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 22:23:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1195 transitions. [2023-08-31 22:23:11,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46103395061728397 [2023-08-31 22:23:11,732 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1195 transitions. [2023-08-31 22:23:11,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1195 transitions. [2023-08-31 22:23:11,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:11,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1195 transitions. [2023-08-31 22:23:11,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.38888888888889) internal successors, (1195), 18 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states 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 22:23:11,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 22:23:11,740 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 22:23:11,740 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 587 flow. Second operand 18 states and 1195 transitions. [2023-08-31 22:23:11,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 119 transitions, 1454 flow [2023-08-31 22:23:11,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 119 transitions, 1311 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-31 22:23:11,755 INFO L231 Difference]: Finished difference. Result has 93 places, 66 transitions, 945 flow [2023-08-31 22:23:11,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=945, PETRI_PLACES=93, PETRI_TRANSITIONS=66} [2023-08-31 22:23:11,756 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 69 predicate places. [2023-08-31 22:23:11,756 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 66 transitions, 945 flow [2023-08-31 22:23:11,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.92307692307692) internal successors, (818), 13 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:11,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:11,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:11,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 22:23:11,962 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,SelfDestructingSolverStorable11 [2023-08-31 22:23:11,963 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 22:23:11,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:11,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1348112973, now seen corresponding path program 6 times [2023-08-31 22:23:11,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:11,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490072642] [2023-08-31 22:23:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:12,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:12,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490072642] [2023-08-31 22:23:12,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490072642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:12,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676534032] [2023-08-31 22:23:12,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:23:12,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:12,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:12,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:23:12,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 22:23:12,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 22:23:12,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:12,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:23:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:12,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:12,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676534032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:12,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:12,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 22:23:12,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552073274] [2023-08-31 22:23:12,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:12,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:23:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:12,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:23:12,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:23:12,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:12,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 66 transitions, 945 flow. Second operand has 14 states, 14 states have (on average 62.714285714285715) internal successors, (878), 14 states have internal predecessors, (878), 0 states have call successors, (0), 0 states 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 22:23:12,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:12,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:12,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:12,725 INFO L130 PetriNetUnfolder]: 338/619 cut-off events. [2023-08-31 22:23:12,725 INFO L131 PetriNetUnfolder]: For 15458/15458 co-relation queries the response was YES. [2023-08-31 22:23:12,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4528 conditions, 619 events. 338/619 cut-off events. For 15458/15458 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2619 event pairs, 27 based on Foata normal form. 24/643 useless extension candidates. Maximal degree in co-relation 4489. Up to 207 conditions per place. [2023-08-31 22:23:12,731 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 56 selfloop transitions, 60 changer transitions 19/135 dead transitions. [2023-08-31 22:23:12,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 2184 flow [2023-08-31 22:23:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 22:23:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 22:23:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1190 transitions. [2023-08-31 22:23:12,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591049382716049 [2023-08-31 22:23:12,736 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1190 transitions. [2023-08-31 22:23:12,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1190 transitions. [2023-08-31 22:23:12,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:12,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1190 transitions. [2023-08-31 22:23:12,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.11111111111111) internal successors, (1190), 18 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 22:23:12,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 22:23:12,744 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 22:23:12,744 INFO L175 Difference]: Start difference. First operand has 93 places, 66 transitions, 945 flow. Second operand 18 states and 1190 transitions. [2023-08-31 22:23:12,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 2184 flow [2023-08-31 22:23:12,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1904 flow, removed 130 selfloop flow, removed 4 redundant places. [2023-08-31 22:23:12,783 INFO L231 Difference]: Finished difference. Result has 114 places, 82 transitions, 1312 flow [2023-08-31 22:23:12,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1312, PETRI_PLACES=114, PETRI_TRANSITIONS=82} [2023-08-31 22:23:12,784 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 90 predicate places. [2023-08-31 22:23:12,784 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 82 transitions, 1312 flow [2023-08-31 22:23:12,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.714285714285715) internal successors, (878), 14 states have internal predecessors, (878), 0 states have call successors, (0), 0 states 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 22:23:12,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:12,785 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:12,795 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 22:23:12,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:12,991 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 22:23:12,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:12,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1879733603, now seen corresponding path program 7 times [2023-08-31 22:23:12,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:12,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715085317] [2023-08-31 22:23:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:12,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:13,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:13,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715085317] [2023-08-31 22:23:13,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715085317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:13,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340564028] [2023-08-31 22:23:13,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 22:23:13,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:13,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:13,076 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 22:23:13,101 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 22:23:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:13,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:23:13,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:13,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:13,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340564028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:13,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:13,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 22:23:13,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485593888] [2023-08-31 22:23:13,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:13,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:23:13,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:23:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:23:13,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:13,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 82 transitions, 1312 flow. Second operand has 15 states, 15 states have (on average 62.733333333333334) internal successors, (941), 15 states have internal predecessors, (941), 0 states have call successors, (0), 0 states 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 22:23:13,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:13,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:13,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:13,746 INFO L130 PetriNetUnfolder]: 390/711 cut-off events. [2023-08-31 22:23:13,746 INFO L131 PetriNetUnfolder]: For 27719/27719 co-relation queries the response was YES. [2023-08-31 22:23:13,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5904 conditions, 711 events. 390/711 cut-off events. For 27719/27719 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3084 event pairs, 12 based on Foata normal form. 24/735 useless extension candidates. Maximal degree in co-relation 5857. Up to 238 conditions per place. [2023-08-31 22:23:13,754 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 45 selfloop transitions, 84 changer transitions 36/165 dead transitions. [2023-08-31 22:23:13,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 165 transitions, 2974 flow [2023-08-31 22:23:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 22:23:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 22:23:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1392 transitions. [2023-08-31 22:23:13,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-08-31 22:23:13,759 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1392 transitions. [2023-08-31 22:23:13,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1392 transitions. [2023-08-31 22:23:13,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:13,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1392 transitions. [2023-08-31 22:23:13,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.28571428571429) internal successors, (1392), 21 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states 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 22:23:13,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 144.0) internal successors, (3168), 22 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states 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 22:23:13,768 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 144.0) internal successors, (3168), 22 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states 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 22:23:13,768 INFO L175 Difference]: Start difference. First operand has 114 places, 82 transitions, 1312 flow. Second operand 21 states and 1392 transitions. [2023-08-31 22:23:13,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 165 transitions, 2974 flow [2023-08-31 22:23:13,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 165 transitions, 2402 flow, removed 246 selfloop flow, removed 12 redundant places. [2023-08-31 22:23:13,815 INFO L231 Difference]: Finished difference. Result has 132 places, 101 transitions, 1713 flow [2023-08-31 22:23:13,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1713, PETRI_PLACES=132, PETRI_TRANSITIONS=101} [2023-08-31 22:23:13,815 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 108 predicate places. [2023-08-31 22:23:13,816 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 101 transitions, 1713 flow [2023-08-31 22:23:13,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.733333333333334) internal successors, (941), 15 states have internal predecessors, (941), 0 states have call successors, (0), 0 states 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 22:23:13,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:13,816 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:13,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:14,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:14,025 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 22:23:14,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash 556885969, now seen corresponding path program 8 times [2023-08-31 22:23:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:14,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011640072] [2023-08-31 22:23:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:14,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:14,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011640072] [2023-08-31 22:23:14,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011640072] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:14,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882359998] [2023-08-31 22:23:14,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:14,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:14,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:14,208 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 22:23:14,236 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 22:23:14,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:14,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 22:23:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:14,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:14,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882359998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:14,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:14,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-08-31 22:23:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759804865] [2023-08-31 22:23:14,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:14,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 22:23:14,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 22:23:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-31 22:23:14,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:14,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 101 transitions, 1713 flow. Second operand has 22 states, 22 states have (on average 62.5) internal successors, (1375), 22 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states 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 22:23:14,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:14,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:14,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:15,315 INFO L130 PetriNetUnfolder]: 538/959 cut-off events. [2023-08-31 22:23:15,316 INFO L131 PetriNetUnfolder]: For 43225/43225 co-relation queries the response was YES. [2023-08-31 22:23:15,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8739 conditions, 959 events. 538/959 cut-off events. For 43225/43225 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4101 event pairs, 15 based on Foata normal form. 36/995 useless extension candidates. Maximal degree in co-relation 8685. Up to 330 conditions per place. [2023-08-31 22:23:15,327 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 60 selfloop transitions, 121 changer transitions 66/247 dead transitions. [2023-08-31 22:23:15,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 247 transitions, 4925 flow [2023-08-31 22:23:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 22:23:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 22:23:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2378 transitions. [2023-08-31 22:23:15,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45871913580246915 [2023-08-31 22:23:15,332 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2378 transitions. [2023-08-31 22:23:15,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2378 transitions. [2023-08-31 22:23:15,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:15,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2378 transitions. [2023-08-31 22:23:15,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 66.05555555555556) internal successors, (2378), 36 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states 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 22:23:15,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 144.0) internal successors, (5328), 37 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states 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 22:23:15,345 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 144.0) internal successors, (5328), 37 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states 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 22:23:15,346 INFO L175 Difference]: Start difference. First operand has 132 places, 101 transitions, 1713 flow. Second operand 36 states and 2378 transitions. [2023-08-31 22:23:15,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 247 transitions, 4925 flow [2023-08-31 22:23:15,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 247 transitions, 4318 flow, removed 265 selfloop flow, removed 14 redundant places. [2023-08-31 22:23:15,425 INFO L231 Difference]: Finished difference. Result has 171 places, 138 transitions, 2758 flow [2023-08-31 22:23:15,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2758, PETRI_PLACES=171, PETRI_TRANSITIONS=138} [2023-08-31 22:23:15,426 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 147 predicate places. [2023-08-31 22:23:15,426 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 138 transitions, 2758 flow [2023-08-31 22:23:15,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.5) internal successors, (1375), 22 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states 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 22:23:15,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:15,427 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:15,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 22:23:15,639 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,SelfDestructingSolverStorable14 [2023-08-31 22:23:15,640 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 22:23:15,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:15,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1563143313, now seen corresponding path program 9 times [2023-08-31 22:23:15,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:15,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590675558] [2023-08-31 22:23:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:15,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590675558] [2023-08-31 22:23:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590675558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965140964] [2023-08-31 22:23:15,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:23:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:15,956 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 22:23:15,966 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 22:23:16,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-31 22:23:16,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 22:23:16,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:16,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:16,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965140964] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:16,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:16,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-08-31 22:23:16,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399118479] [2023-08-31 22:23:16,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:16,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 22:23:16,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 22:23:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2023-08-31 22:23:16,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:16,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 138 transitions, 2758 flow. Second operand has 34 states, 34 states have (on average 62.3235294117647) internal successors, (2119), 34 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states 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 22:23:16,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:16,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:16,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:17,525 INFO L130 PetriNetUnfolder]: 674/1231 cut-off events. [2023-08-31 22:23:17,525 INFO L131 PetriNetUnfolder]: For 90395/90395 co-relation queries the response was YES. [2023-08-31 22:23:17,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13998 conditions, 1231 events. 674/1231 cut-off events. For 90395/90395 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5570 event pairs, 99 based on Foata normal form. 24/1255 useless extension candidates. Maximal degree in co-relation 13930. Up to 466 conditions per place. [2023-08-31 22:23:17,541 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 113 selfloop transitions, 100 changer transitions 71/284 dead transitions. [2023-08-31 22:23:17,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 284 transitions, 6989 flow [2023-08-31 22:23:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 22:23:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 22:23:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2489 transitions. [2023-08-31 22:23:17,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2023-08-31 22:23:17,545 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2489 transitions. [2023-08-31 22:23:17,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2489 transitions. [2023-08-31 22:23:17,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:17,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2489 transitions. [2023-08-31 22:23:17,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 65.5) internal successors, (2489), 38 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states 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 22:23:17,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states 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 22:23:17,571 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states 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 22:23:17,572 INFO L175 Difference]: Start difference. First operand has 171 places, 138 transitions, 2758 flow. Second operand 38 states and 2489 transitions. [2023-08-31 22:23:17,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 284 transitions, 6989 flow [2023-08-31 22:23:17,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 284 transitions, 5398 flow, removed 763 selfloop flow, removed 13 redundant places. [2023-08-31 22:23:17,859 INFO L231 Difference]: Finished difference. Result has 203 places, 172 transitions, 3028 flow [2023-08-31 22:23:17,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3028, PETRI_PLACES=203, PETRI_TRANSITIONS=172} [2023-08-31 22:23:17,861 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 179 predicate places. [2023-08-31 22:23:17,861 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 172 transitions, 3028 flow [2023-08-31 22:23:17,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 62.3235294117647) internal successors, (2119), 34 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states 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 22:23:17,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:17,863 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:17,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:18,067 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,SelfDestructingSolverStorable15 [2023-08-31 22:23:18,068 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 22:23:18,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1097783361, now seen corresponding path program 10 times [2023-08-31 22:23:18,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:18,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721400280] [2023-08-31 22:23:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:18,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:18,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:18,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721400280] [2023-08-31 22:23:18,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721400280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:18,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440146970] [2023-08-31 22:23:18,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:23:18,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:18,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:18,365 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 22:23:18,393 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 22:23:18,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:23:18,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:18,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 22:23:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:18,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:18,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440146970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:18,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:18,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-08-31 22:23:18,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853188392] [2023-08-31 22:23:18,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:18,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 22:23:18,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:18,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 22:23:18,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2023-08-31 22:23:18,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:18,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 172 transitions, 3028 flow. Second operand has 35 states, 35 states have (on average 62.34285714285714) internal successors, (2182), 35 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states 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 22:23:18,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:18,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:18,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:20,285 INFO L130 PetriNetUnfolder]: 858/1595 cut-off events. [2023-08-31 22:23:20,285 INFO L131 PetriNetUnfolder]: For 148238/148238 co-relation queries the response was YES. [2023-08-31 22:23:20,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17910 conditions, 1595 events. 858/1595 cut-off events. For 148238/148238 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7838 event pairs, 42 based on Foata normal form. 32/1627 useless extension candidates. Maximal degree in co-relation 17838. Up to 646 conditions per place. [2023-08-31 22:23:20,309 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 88 selfloop transitions, 180 changer transitions 83/351 dead transitions. [2023-08-31 22:23:20,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 351 transitions, 7743 flow [2023-08-31 22:23:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 22:23:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 22:23:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2890 transitions. [2023-08-31 22:23:20,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45612373737373735 [2023-08-31 22:23:20,314 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2890 transitions. [2023-08-31 22:23:20,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2890 transitions. [2023-08-31 22:23:20,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:20,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2890 transitions. [2023-08-31 22:23:20,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 65.68181818181819) internal successors, (2890), 44 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states 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 22:23:20,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 144.0) internal successors, (6480), 45 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states 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 22:23:20,329 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 144.0) internal successors, (6480), 45 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states 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 22:23:20,329 INFO L175 Difference]: Start difference. First operand has 203 places, 172 transitions, 3028 flow. Second operand 44 states and 2890 transitions. [2023-08-31 22:23:20,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 351 transitions, 7743 flow [2023-08-31 22:23:20,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 351 transitions, 7094 flow, removed 257 selfloop flow, removed 17 redundant places. [2023-08-31 22:23:20,627 INFO L231 Difference]: Finished difference. Result has 240 places, 221 transitions, 4323 flow [2023-08-31 22:23:20,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4323, PETRI_PLACES=240, PETRI_TRANSITIONS=221} [2023-08-31 22:23:20,628 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 216 predicate places. [2023-08-31 22:23:20,628 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 221 transitions, 4323 flow [2023-08-31 22:23:20,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 62.34285714285714) internal successors, (2182), 35 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states 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 22:23:20,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:20,629 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:20,639 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 22:23:20,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:20,838 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 22:23:20,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:20,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1091144601, now seen corresponding path program 11 times [2023-08-31 22:23:20,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:20,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781153688] [2023-08-31 22:23:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:20,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:21,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:21,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781153688] [2023-08-31 22:23:21,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781153688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:21,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654469053] [2023-08-31 22:23:21,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:23:21,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:21,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:21,077 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 22:23:21,080 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 22:23:21,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-31 22:23:21,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 22:23:21,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:21,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:21,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654469053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:21,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:21,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-08-31 22:23:21,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788804020] [2023-08-31 22:23:21,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:21,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 22:23:21,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 22:23:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2023-08-31 22:23:21,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:21,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 221 transitions, 4323 flow. Second operand has 35 states, 35 states have (on average 62.34285714285714) internal successors, (2182), 35 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states 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 22:23:21,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:21,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:21,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:22,996 INFO L130 PetriNetUnfolder]: 1002/1859 cut-off events. [2023-08-31 22:23:22,997 INFO L131 PetriNetUnfolder]: For 242261/242261 co-relation queries the response was YES. [2023-08-31 22:23:23,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23308 conditions, 1859 events. 1002/1859 cut-off events. For 242261/242261 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 9414 event pairs, 16 based on Foata normal form. 36/1895 useless extension candidates. Maximal degree in co-relation 23224. Up to 766 conditions per place. [2023-08-31 22:23:23,024 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 75 selfloop transitions, 233 changer transitions 81/389 dead transitions. [2023-08-31 22:23:23,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 389 transitions, 9369 flow [2023-08-31 22:23:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 22:23:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 22:23:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2897 transitions. [2023-08-31 22:23:23,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45722853535353536 [2023-08-31 22:23:23,029 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2897 transitions. [2023-08-31 22:23:23,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2897 transitions. [2023-08-31 22:23:23,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:23,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2897 transitions. [2023-08-31 22:23:23,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 65.8409090909091) internal successors, (2897), 44 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states 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 22:23:23,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 144.0) internal successors, (6480), 45 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states 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 22:23:23,042 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 144.0) internal successors, (6480), 45 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states 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 22:23:23,042 INFO L175 Difference]: Start difference. First operand has 240 places, 221 transitions, 4323 flow. Second operand 44 states and 2897 transitions. [2023-08-31 22:23:23,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 389 transitions, 9369 flow [2023-08-31 22:23:23,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 389 transitions, 8453 flow, removed 368 selfloop flow, removed 18 redundant places. [2023-08-31 22:23:23,483 INFO L231 Difference]: Finished difference. Result has 279 places, 259 transitions, 5379 flow [2023-08-31 22:23:23,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=3437, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5379, PETRI_PLACES=279, PETRI_TRANSITIONS=259} [2023-08-31 22:23:23,484 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 255 predicate places. [2023-08-31 22:23:23,484 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 259 transitions, 5379 flow [2023-08-31 22:23:23,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 62.34285714285714) internal successors, (2182), 35 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states 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 22:23:23,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:23,485 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:23,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 22:23:23,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 22:23:23,690 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 22:23:23,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash -860983159, now seen corresponding path program 12 times [2023-08-31 22:23:23,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:23,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515830737] [2023-08-31 22:23:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:23,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515830737] [2023-08-31 22:23:23,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515830737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967969331] [2023-08-31 22:23:23,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:23:23,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:23,993 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 22:23:23,994 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 22:23:24,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-08-31 22:23:24,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:24,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 22:23:24,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:24,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:24,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967969331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:24,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:24,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2023-08-31 22:23:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071780132] [2023-08-31 22:23:24,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 22:23:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 22:23:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-08-31 22:23:24,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:24,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 259 transitions, 5379 flow. Second operand has 38 states, 38 states have (on average 62.28947368421053) internal successors, (2367), 38 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states 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 22:23:24,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:24,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:24,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:25,726 INFO L130 PetriNetUnfolder]: 1050/1943 cut-off events. [2023-08-31 22:23:25,726 INFO L131 PetriNetUnfolder]: For 338236/338236 co-relation queries the response was YES. [2023-08-31 22:23:25,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27280 conditions, 1943 events. 1050/1943 cut-off events. For 338236/338236 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9854 event pairs, 12 based on Foata normal form. 20/1963 useless extension candidates. Maximal degree in co-relation 27181. Up to 790 conditions per place. [2023-08-31 22:23:25,751 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 70 selfloop transitions, 249 changer transitions 78/397 dead transitions. [2023-08-31 22:23:25,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 397 transitions, 10364 flow [2023-08-31 22:23:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-31 22:23:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-31 22:23:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2766 transitions. [2023-08-31 22:23:25,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573412698412698 [2023-08-31 22:23:25,755 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2766 transitions. [2023-08-31 22:23:25,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2766 transitions. [2023-08-31 22:23:25,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:25,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2766 transitions. [2023-08-31 22:23:25,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 65.85714285714286) internal successors, (2766), 42 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states 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 22:23:25,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 144.0) internal successors, (6192), 43 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states 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 22:23:25,766 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 144.0) internal successors, (6192), 43 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states 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 22:23:25,766 INFO L175 Difference]: Start difference. First operand has 279 places, 259 transitions, 5379 flow. Second operand 42 states and 2766 transitions. [2023-08-31 22:23:25,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 397 transitions, 10364 flow [2023-08-31 22:23:26,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 397 transitions, 9124 flow, removed 506 selfloop flow, removed 22 redundant places. [2023-08-31 22:23:26,675 INFO L231 Difference]: Finished difference. Result has 306 places, 271 transitions, 5577 flow [2023-08-31 22:23:26,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=4233, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5577, PETRI_PLACES=306, PETRI_TRANSITIONS=271} [2023-08-31 22:23:26,676 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 282 predicate places. [2023-08-31 22:23:26,676 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 271 transitions, 5577 flow [2023-08-31 22:23:26,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 62.28947368421053) internal successors, (2367), 38 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states 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 22:23:26,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:26,677 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:26,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-31 22:23:26,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:26,885 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 22:23:26,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:26,885 INFO L85 PathProgramCache]: Analyzing trace with hash -125608721, now seen corresponding path program 13 times [2023-08-31 22:23:26,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:26,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127851244] [2023-08-31 22:23:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:26,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:27,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:27,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127851244] [2023-08-31 22:23:27,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127851244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:27,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353832884] [2023-08-31 22:23:27,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 22:23:27,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:27,205 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 22:23:27,230 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 22:23:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-31 22:23:27,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:27,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:27,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353832884] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:27,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:27,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 27 [2023-08-31 22:23:27,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922207365] [2023-08-31 22:23:27,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:27,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 22:23:27,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 22:23:27,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2023-08-31 22:23:27,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:23:27,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 271 transitions, 5577 flow. Second operand has 29 states, 29 states have (on average 62.41379310344828) internal successors, (1810), 29 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states 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 22:23:27,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:27,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:23:27,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:29,081 INFO L130 PetriNetUnfolder]: 1150/2119 cut-off events. [2023-08-31 22:23:29,081 INFO L131 PetriNetUnfolder]: For 422487/422487 co-relation queries the response was YES. [2023-08-31 22:23:29,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31341 conditions, 2119 events. 1150/2119 cut-off events. For 422487/422487 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 10718 event pairs, 15 based on Foata normal form. 20/2139 useless extension candidates. Maximal degree in co-relation 31235. Up to 850 conditions per place. [2023-08-31 22:23:29,111 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 80 selfloop transitions, 274 changer transitions 90/444 dead transitions. [2023-08-31 22:23:29,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 444 transitions, 12140 flow [2023-08-31 22:23:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-31 22:23:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-31 22:23:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3160 transitions. [2023-08-31 22:23:29,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45717592592592593 [2023-08-31 22:23:29,117 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3160 transitions. [2023-08-31 22:23:29,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3160 transitions. [2023-08-31 22:23:29,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:29,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3160 transitions. [2023-08-31 22:23:29,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 65.83333333333333) internal successors, (3160), 48 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states 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 22:23:29,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 144.0) internal successors, (7056), 49 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states 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 22:23:29,130 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 144.0) internal successors, (7056), 49 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states 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 22:23:29,131 INFO L175 Difference]: Start difference. First operand has 306 places, 271 transitions, 5577 flow. Second operand 48 states and 3160 transitions. [2023-08-31 22:23:29,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 444 transitions, 12140 flow [2023-08-31 22:23:29,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 444 transitions, 10425 flow, removed 651 selfloop flow, removed 34 redundant places. [2023-08-31 22:23:29,948 INFO L231 Difference]: Finished difference. Result has 329 places, 296 transitions, 6309 flow [2023-08-31 22:23:29,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6309, PETRI_PLACES=329, PETRI_TRANSITIONS=296} [2023-08-31 22:23:29,948 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 305 predicate places. [2023-08-31 22:23:29,948 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 296 transitions, 6309 flow [2023-08-31 22:23:29,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 62.41379310344828) internal successors, (1810), 29 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states 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 22:23:29,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:29,949 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:29,955 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 22:23:30,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:30,154 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 22:23:30,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:30,154 INFO L85 PathProgramCache]: Analyzing trace with hash -782550557, now seen corresponding path program 14 times [2023-08-31 22:23:30,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:30,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646231752] [2023-08-31 22:23:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:30,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:23:30,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:23:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:23:30,234 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:23:30,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:23:30,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (7 of 8 remaining) [2023-08-31 22:23:30,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-31 22:23:30,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-31 22:23:30,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-31 22:23:30,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-08-31 22:23:30,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-31 22:23:30,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 8 remaining) [2023-08-31 22:23:30,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 8 remaining) [2023-08-31 22:23:30,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 22:23:30,243 INFO L445 BasicCegarLoop]: Path program histogram: [14, 2, 1, 1, 1, 1, 1] [2023-08-31 22:23:30,247 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:23:30,247 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:23:30,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:23:30 BasicIcfg [2023-08-31 22:23:30,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:23:30,328 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:23:30,328 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:23:30,328 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:23:30,329 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:05" (3/4) ... [2023-08-31 22:23:30,331 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:23:30,331 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:23:30,332 INFO L158 Benchmark]: Toolchain (without parser) took 26263.91ms. Allocated memory was 86.0MB in the beginning and 482.3MB in the end (delta: 396.4MB). Free memory was 62.9MB in the beginning and 298.3MB in the end (delta: -235.4MB). Peak memory consumption was 163.3MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,332 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:23:30,332 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.24ms. Allocated memory is still 86.0MB. Free memory was 62.7MB in the beginning and 63.6MB in the end (delta: -956.1kB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,332 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.32ms. Allocated memory is still 86.0MB. Free memory was 63.6MB in the beginning and 61.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,333 INFO L158 Benchmark]: Boogie Preprocessor took 50.04ms. Allocated memory is still 86.0MB. Free memory was 61.5MB in the beginning and 59.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,333 INFO L158 Benchmark]: RCFGBuilder took 431.64ms. Allocated memory is still 86.0MB. Free memory was 59.9MB in the beginning and 46.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,333 INFO L158 Benchmark]: TraceAbstraction took 25304.80ms. Allocated memory was 86.0MB in the beginning and 482.3MB in the end (delta: 396.4MB). Free memory was 46.1MB in the beginning and 298.3MB in the end (delta: -252.2MB). Peak memory consumption was 273.8MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,333 INFO L158 Benchmark]: Witness Printer took 3.25ms. Allocated memory is still 482.3MB. Free memory is still 298.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:23:30,335 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 411.24ms. Allocated memory is still 86.0MB. Free memory was 62.7MB in the beginning and 63.6MB in the end (delta: -956.1kB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.32ms. Allocated memory is still 86.0MB. Free memory was 63.6MB in the beginning and 61.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.04ms. Allocated memory is still 86.0MB. Free memory was 61.5MB in the beginning and 59.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 431.64ms. Allocated memory is still 86.0MB. Free memory was 59.9MB in the beginning and 46.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 25304.80ms. Allocated memory was 86.0MB in the beginning and 482.3MB in the end (delta: 396.4MB). Free memory was 46.1MB in the beginning and 298.3MB in the end (delta: -252.2MB). Peak memory consumption was 273.8MB. Max. memory is 16.1GB. * Witness Printer took 3.25ms. Allocated memory is still 482.3MB. Free memory is still 298.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 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 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 722. Possible FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={3:0}, id2={5:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={3:0}, id2={5:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*10 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=7, id1={3:0}, id2={5:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L719] 0 int condJ = j >= (2*10 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={3:0}, id2={5:0}, j=26, k=10, k=10] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 711]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - 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: 25.1s, OverallIterations: 21, TraceHistogramMax: 10, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 13.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4763 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4582 mSDsluCounter, 818 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 763 mSDsCounter, 487 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4729 IncrementalHoareTripleChecker+Invalid, 5216 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 487 mSolverCounterUnsat, 55 mSDtfsCounter, 4729 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 770 GetRequests, 213 SyntacticMatches, 14 SemanticMatches, 543 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8880 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6309occurred in iteration=20, InterpolantAutomatonStates: 371, 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, 5.6s InterpolantComputationTime, 450 NumberOfCodeBlocks, 450 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 560 ConstructedInterpolants, 0 QuantifiedInterpolants, 2452 SizeOfPredicates, 98 NumberOfNonLiveVariables, 1640 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 40 InterpolantComputations, 10 PerfectInterpolantSequences, 0/816 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-31 22:23:30,361 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 --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 22:23:32,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:23:32,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:23:32,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:23:32,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:23:32,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:23:32,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:23:32,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:23:32,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:23:32,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:23:32,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:23:32,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:23:32,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:23:32,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:23:32,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:23:32,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:23:32,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:23:32,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:23:32,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:23:32,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:23:32,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:23:32,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:23:32,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:23:32,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:23:32,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:23:32,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:23:32,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:23:32,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:23:32,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:23:32,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:23:32,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:23:32,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:23:32,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:23:32,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:23:32,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:23:32,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:23:32,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:23:32,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:23:32,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:23:32,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:23:32,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:23:32,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-31 22:23:32,470 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:23:32,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:23:32,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:23:32,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:23:32,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:23:32,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:23:32,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:23:32,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:23:32,474 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:23:32,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:23:32,475 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:23:32,475 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:23:32,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:23:32,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:23:32,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:23:32,476 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:23:32,476 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:23:32,476 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:23:32,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:23:32,476 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:23:32,477 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-31 22:23:32,477 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-31 22:23:32,477 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:23:32,477 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:23:32,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:23:32,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:23:32,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:23:32,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:23:32,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:23:32,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:23:32,478 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-31 22:23:32,479 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-31 22:23:32,479 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:23:32,479 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:23:32,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:23:32,479 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-31 22:23:32,480 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:23:32,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:23:32,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:23:32,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:23:32,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:23:32,800 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:23:32,800 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:23:32,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2023-08-31 22:23:34,051 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:23:34,335 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:23:34,335 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2023-08-31 22:23:34,346 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17e3e41e1/260a738988c840abb1d6cc29212ee5e6/FLAGb34d94b49 [2023-08-31 22:23:34,358 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17e3e41e1/260a738988c840abb1d6cc29212ee5e6 [2023-08-31 22:23:34,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:23:34,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:23:34,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:23:34,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:23:34,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:23:34,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ed1248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34, skipping insertion in model container [2023-08-31 22:23:34,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:23:34,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:23:34,710 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-2.i[30963,30976] [2023-08-31 22:23:34,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:23:34,730 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:23:34,791 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-2.i[30963,30976] [2023-08-31 22:23:34,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:23:34,834 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:23:34,835 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:23:34,841 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:23:34,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34 WrapperNode [2023-08-31 22:23:34,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:23:34,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:23:34,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:23:34,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:23:34,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,903 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2023-08-31 22:23:34,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:23:34,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:23:34,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:23:34,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:23:34,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:23:34,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:23:34,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:23:34,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:23:34,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (1/1) ... [2023-08-31 22:23:34,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:23:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:34,993 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 22:23:35,019 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 22:23:35,037 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:23:35,038 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:23:35,038 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:23:35,038 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:23:35,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 22:23:35,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:23:35,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:23:35,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:23:35,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-31 22:23:35,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-31 22:23:35,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 22:23:35,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:23:35,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:23:35,041 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 22:23:35,241 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:23:35,243 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:23:35,462 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:23:35,468 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:23:35,468 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:23:35,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:35 BoogieIcfgContainer [2023-08-31 22:23:35,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:23:35,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:23:35,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:23:35,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:23:35,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:23:34" (1/3) ... [2023-08-31 22:23:35,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72274a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:23:35, skipping insertion in model container [2023-08-31 22:23:35,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:34" (2/3) ... [2023-08-31 22:23:35,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72274a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:23:35, skipping insertion in model container [2023-08-31 22:23:35,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:35" (3/3) ... [2023-08-31 22:23:35,479 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2023-08-31 22:23:35,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:23:35,496 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-31 22:23:35,496 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:23:35,583 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:23:35,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 75 transitions, 160 flow [2023-08-31 22:23:35,670 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-08-31 22:23:35,670 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:35,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 73 events. 5/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-08-31 22:23:35,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 75 transitions, 160 flow [2023-08-31 22:23:35,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 73 transitions, 152 flow [2023-08-31 22:23:35,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:23:35,691 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 73 transitions, 152 flow [2023-08-31 22:23:35,694 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 73 transitions, 152 flow [2023-08-31 22:23:35,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 152 flow [2023-08-31 22:23:35,710 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-08-31 22:23:35,711 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:35,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 73 events. 5/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-08-31 22:23:35,713 INFO L119 LiptonReduction]: Number of co-enabled transitions 1254 [2023-08-31 22:23:39,428 INFO L134 LiptonReduction]: Checked pairs total: 1134 [2023-08-31 22:23:39,429 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-31 22:23:39,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:23:39,449 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;@47ade693, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:23:39,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-31 22:23:39,451 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:23:39,451 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:39,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:39,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:23:39,452 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 22:23:39,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash 295, now seen corresponding path program 1 times [2023-08-31 22:23:39,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:39,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198567957] [2023-08-31 22:23:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:39,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:39,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:39,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:39,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-31 22:23:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-31 22:23:39,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:39,541 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 22:23:39,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:39,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:39,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198567957] [2023-08-31 22:23:39,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198567957] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:39,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:39,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:23:39,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232718665] [2023-08-31 22:23:39,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:39,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:23:39,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:23:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:23:39,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2023-08-31 22:23:39,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 46 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 22:23:39,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:39,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2023-08-31 22:23:39,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:39,696 INFO L130 PetriNetUnfolder]: 112/179 cut-off events. [2023-08-31 22:23:39,696 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:23:39,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 179 events. 112/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 464 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 22:23:39,699 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2023-08-31 22:23:39,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-08-31 22:23:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:23:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:23:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2023-08-31 22:23:39,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2023-08-31 22:23:39,745 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2023-08-31 22:23:39,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2023-08-31 22:23:39,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:39,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2023-08-31 22:23:39,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 22:23:39,755 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 22:23:39,756 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 22:23:39,757 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 46 flow. Second operand 2 states and 158 transitions. [2023-08-31 22:23:39,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-08-31 22:23:39,760 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 22:23:39,771 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 36 flow [2023-08-31 22:23:39,773 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 22:23:39,776 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:23:39,776 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 36 flow [2023-08-31 22:23:39,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 22:23:39,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:39,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:23:39,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:39,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:39,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:39,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:39,995 INFO L85 PathProgramCache]: Analyzing trace with hash 288861, now seen corresponding path program 1 times [2023-08-31 22:23:39,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:39,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873752225] [2023-08-31 22:23:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:39,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:39,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:40,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:40,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-31 22:23:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:40,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:23:40,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:40,129 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-31 22:23:40,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2023-08-31 22:23:40,145 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 22:23:40,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:40,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:40,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873752225] [2023-08-31 22:23:40,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873752225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:40,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:40,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:23:40,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151530879] [2023-08-31 22:23:40,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:40,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:23:40,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:40,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:23:40,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:23:40,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:40,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 22:23:40,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:40,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:40,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:40,299 INFO L130 PetriNetUnfolder]: 91/146 cut-off events. [2023-08-31 22:23:40,300 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:40,301 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 349 event pairs, 34 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 300. Up to 92 conditions per place. [2023-08-31 22:23:40,302 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-31 22:23:40,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 88 flow [2023-08-31 22:23:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:23:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:23:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-31 22:23:40,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-31 22:23:40,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-31 22:23:40,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-31 22:23:40,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:40,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-31 22:23:40,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 22:23:40,309 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 22:23:40,310 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 22:23:40,310 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 36 flow. Second operand 3 states and 208 transitions. [2023-08-31 22:23:40,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 88 flow [2023-08-31 22:23:40,310 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 22:23:40,311 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 38 flow [2023-08-31 22:23:40,311 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 22:23:40,312 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:23:40,312 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 38 flow [2023-08-31 22:23:40,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 22:23:40,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:40,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:23:40,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:40,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:40,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:23:40,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash 288862, now seen corresponding path program 1 times [2023-08-31 22:23:40,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:40,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288486886] [2023-08-31 22:23:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:40,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:40,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:40,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:40,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-31 22:23:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:23:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:40,621 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:23:40,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-31 22:23:40,647 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 22:23:40,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:40,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:40,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288486886] [2023-08-31 22:23:40,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288486886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:40,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:40,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:23:40,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457004900] [2023-08-31 22:23:40,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:40,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:23:40,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:23:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:23:40,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 144 [2023-08-31 22:23:40,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 22:23:40,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:40,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 144 [2023-08-31 22:23:40,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:40,768 INFO L130 PetriNetUnfolder]: 88/140 cut-off events. [2023-08-31 22:23:40,768 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:23:40,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 140 events. 88/140 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 326 event pairs, 44 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 298. Up to 113 conditions per place. [2023-08-31 22:23:40,773 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-31 22:23:40,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 88 flow [2023-08-31 22:23:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:23:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:23:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-08-31 22:23:40,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-31 22:23:40,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-08-31 22:23:40,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-08-31 22:23:40,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:40,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-08-31 22:23:40,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 22:23:40,785 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 22:23:40,785 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 22:23:40,786 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 38 flow. Second operand 3 states and 216 transitions. [2023-08-31 22:23:40,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 88 flow [2023-08-31 22:23:40,787 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 22:23:40,787 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-31 22:23:40,788 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 22:23:40,789 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -4 predicate places. [2023-08-31 22:23:40,789 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-31 22:23:40,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 22:23:40,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:40,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:23:40,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:40,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:40,999 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 22:23:41,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash 15687470, now seen corresponding path program 1 times [2023-08-31 22:23:41,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:41,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373959589] [2023-08-31 22:23:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:41,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:41,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:41,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-31 22:23:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:41,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:23:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:41,124 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 22:23:41,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:41,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:41,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373959589] [2023-08-31 22:23:41,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373959589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:41,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:41,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:23:41,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382808606] [2023-08-31 22:23:41,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:41,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:23:41,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:41,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:23:41,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:23:41,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 144 [2023-08-31 22:23:41,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 22:23:41,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:41,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 144 [2023-08-31 22:23:41,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:41,280 INFO L130 PetriNetUnfolder]: 176/281 cut-off events. [2023-08-31 22:23:41,281 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-31 22:23:41,281 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 878 event pairs, 14 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 598. Up to 144 conditions per place. [2023-08-31 22:23:41,284 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 31 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2023-08-31 22:23:41,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 166 flow [2023-08-31 22:23:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:23:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:23:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 355 transitions. [2023-08-31 22:23:41,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2023-08-31 22:23:41,286 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 355 transitions. [2023-08-31 22:23:41,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 355 transitions. [2023-08-31 22:23:41,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:41,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 355 transitions. [2023-08-31 22:23:41,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 22:23:41,290 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 22:23:41,290 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 22:23:41,291 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 5 states and 355 transitions. [2023-08-31 22:23:41,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 166 flow [2023-08-31 22:23:41,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:23:41,294 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 79 flow [2023-08-31 22:23:41,294 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=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=79, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-08-31 22:23:41,295 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-31 22:23:41,295 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 79 flow [2023-08-31 22:23:41,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 22:23:41,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:41,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:41,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:41,505 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 22:23:41,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 486312123, now seen corresponding path program 1 times [2023-08-31 22:23:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:41,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730334614] [2023-08-31 22:23:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:41,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:41,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:41,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-31 22:23:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:41,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:23:41,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:41,717 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 22:23:41,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:41,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:41,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730334614] [2023-08-31 22:23:41,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730334614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:41,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:41,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:23:41,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029345788] [2023-08-31 22:23:41,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:41,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:23:41,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:41,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:23:41,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:23:43,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 22:23:45,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 22:23:45,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 144 [2023-08-31 22:23:45,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:45,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:45,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 144 [2023-08-31 22:23:45,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:46,075 INFO L130 PetriNetUnfolder]: 130/212 cut-off events. [2023-08-31 22:23:46,076 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2023-08-31 22:23:46,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 212 events. 130/212 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 629 event pairs, 47 based on Foata normal form. 23/235 useless extension candidates. Maximal degree in co-relation 579. Up to 143 conditions per place. [2023-08-31 22:23:46,077 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 17 selfloop transitions, 1 changer transitions 10/28 dead transitions. [2023-08-31 22:23:46,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 167 flow [2023-08-31 22:23:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:23:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:23:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 248 transitions. [2023-08-31 22:23:46,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-08-31 22:23:46,079 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 248 transitions. [2023-08-31 22:23:46,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 248 transitions. [2023-08-31 22:23:46,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:46,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 248 transitions. [2023-08-31 22:23:46,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 22:23:46,081 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 22:23:46,082 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 22:23:46,082 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 79 flow. Second operand 4 states and 248 transitions. [2023-08-31 22:23:46,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 167 flow [2023-08-31 22:23:46,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:23:46,084 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 77 flow [2023-08-31 22:23:46,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-08-31 22:23:46,085 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-08-31 22:23:46,085 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 77 flow [2023-08-31 22:23:46,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:46,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:46,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:46,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:46,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:46,295 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 22:23:46,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2080325179, now seen corresponding path program 1 times [2023-08-31 22:23:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:46,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688990544] [2023-08-31 22:23:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:46,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:46,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:46,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:46,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-31 22:23:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:23:46,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:46,404 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 22:23:46,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:46,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:46,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688990544] [2023-08-31 22:23:46,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688990544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:46,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:46,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:46,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726834105] [2023-08-31 22:23:46,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:46,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:46,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:46,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 22:23:46,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:46,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:46,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:46,540 INFO L130 PetriNetUnfolder]: 92/157 cut-off events. [2023-08-31 22:23:46,540 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-31 22:23:46,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 157 events. 92/157 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 443 event pairs, 23 based on Foata normal form. 6/163 useless extension candidates. Maximal degree in co-relation 449. Up to 61 conditions per place. [2023-08-31 22:23:46,541 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 22 selfloop transitions, 9 changer transitions 3/34 dead transitions. [2023-08-31 22:23:46,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 193 flow [2023-08-31 22:23:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:23:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:23:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2023-08-31 22:23:46,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-08-31 22:23:46,544 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2023-08-31 22:23:46,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2023-08-31 22:23:46,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:46,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2023-08-31 22:23:46,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.4) internal successors, (342), 5 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 22:23:46,547 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 22:23:46,547 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 22:23:46,547 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 77 flow. Second operand 5 states and 342 transitions. [2023-08-31 22:23:46,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 193 flow [2023-08-31 22:23:46,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:23:46,549 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 119 flow [2023-08-31 22:23:46,549 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=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-08-31 22:23:46,550 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2023-08-31 22:23:46,550 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 119 flow [2023-08-31 22:23:46,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 22:23:46,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:46,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:46,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:46,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:46,760 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 22:23:46,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2104567520, now seen corresponding path program 1 times [2023-08-31 22:23:46,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:46,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755148826] [2023-08-31 22:23:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:46,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:46,762 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:46,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-31 22:23:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:46,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:23:46,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:46,866 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 22:23:46,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:46,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:46,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755148826] [2023-08-31 22:23:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755148826] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:46,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:46,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:46,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996061983] [2023-08-31 22:23:46,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:46,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:46,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:46,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:46,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:46,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:46,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 22:23:46,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:46,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:46,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:47,016 INFO L130 PetriNetUnfolder]: 132/229 cut-off events. [2023-08-31 22:23:47,017 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2023-08-31 22:23:47,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 229 events. 132/229 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 716 event pairs, 23 based on Foata normal form. 10/239 useless extension candidates. Maximal degree in co-relation 733. Up to 101 conditions per place. [2023-08-31 22:23:47,018 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 34 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2023-08-31 22:23:47,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 301 flow [2023-08-31 22:23:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:23:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:23:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 410 transitions. [2023-08-31 22:23:47,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2023-08-31 22:23:47,021 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 410 transitions. [2023-08-31 22:23:47,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 410 transitions. [2023-08-31 22:23:47,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:47,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 410 transitions. [2023-08-31 22:23:47,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.33333333333333) internal successors, (410), 6 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 22:23:47,024 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 22:23:47,025 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 22:23:47,025 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 119 flow. Second operand 6 states and 410 transitions. [2023-08-31 22:23:47,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 301 flow [2023-08-31 22:23:47,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 284 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 22:23:47,031 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 200 flow [2023-08-31 22:23:47,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, 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=200, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-31 22:23:47,032 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2023-08-31 22:23:47,032 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 200 flow [2023-08-31 22:23:47,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 22:23:47,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:47,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:47,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-31 22:23:47,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:47,242 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 22:23:47,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:47,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2104543340, now seen corresponding path program 2 times [2023-08-31 22:23:47,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:47,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475799256] [2023-08-31 22:23:47,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:47,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:47,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:47,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:47,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-31 22:23:47,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 22:23:47,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:47,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:23:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:47,363 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 22:23:47,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:47,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:47,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475799256] [2023-08-31 22:23:47,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475799256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:47,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:47,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:47,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892375890] [2023-08-31 22:23:47,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:47,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:47,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:47,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:47,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:47,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:47,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 22:23:47,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:47,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:47,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:47,501 INFO L130 PetriNetUnfolder]: 124/219 cut-off events. [2023-08-31 22:23:47,501 INFO L131 PetriNetUnfolder]: For 496/496 co-relation queries the response was YES. [2023-08-31 22:23:47,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 219 events. 124/219 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 705 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 818. Up to 107 conditions per place. [2023-08-31 22:23:47,503 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 30 selfloop transitions, 12 changer transitions 6/48 dead transitions. [2023-08-31 22:23:47,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 381 flow [2023-08-31 22:23:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:23:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:23:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 409 transitions. [2023-08-31 22:23:47,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47337962962962965 [2023-08-31 22:23:47,505 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 409 transitions. [2023-08-31 22:23:47,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 409 transitions. [2023-08-31 22:23:47,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:47,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 409 transitions. [2023-08-31 22:23:47,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.16666666666667) internal successors, (409), 6 states have internal predecessors, (409), 0 states have call successors, (0), 0 states 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 22:23:47,508 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 22:23:47,509 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 22:23:47,509 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 200 flow. Second operand 6 states and 409 transitions. [2023-08-31 22:23:47,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 381 flow [2023-08-31 22:23:47,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 355 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-31 22:23:47,512 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 242 flow [2023-08-31 22:23:47,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-31 22:23:47,513 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 21 predicate places. [2023-08-31 22:23:47,513 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 242 flow [2023-08-31 22:23:47,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 22:23:47,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:47,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:47,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:47,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:47,723 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 22:23:47,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2065235665, now seen corresponding path program 1 times [2023-08-31 22:23:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:47,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838166762] [2023-08-31 22:23:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:47,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:47,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:47,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:47,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-31 22:23:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:47,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:23:47,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:47,835 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 22:23:47,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:47,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:47,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838166762] [2023-08-31 22:23:47,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838166762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:47,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:47,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195155215] [2023-08-31 22:23:47,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:47,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:47,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:47,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:47,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 242 flow. Second operand has 6 states, 6 states have (on average 63.666666666666664) internal successors, (382), 6 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:23:47,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:47,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:47,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:48,040 INFO L130 PetriNetUnfolder]: 172/303 cut-off events. [2023-08-31 22:23:48,040 INFO L131 PetriNetUnfolder]: For 1057/1057 co-relation queries the response was YES. [2023-08-31 22:23:48,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 303 events. 172/303 cut-off events. For 1057/1057 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1066 event pairs, 41 based on Foata normal form. 8/311 useless extension candidates. Maximal degree in co-relation 1216. Up to 131 conditions per place. [2023-08-31 22:23:48,042 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 43 selfloop transitions, 15 changer transitions 5/63 dead transitions. [2023-08-31 22:23:48,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 536 flow [2023-08-31 22:23:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:23:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:23:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 610 transitions. [2023-08-31 22:23:48,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470679012345679 [2023-08-31 22:23:48,045 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 610 transitions. [2023-08-31 22:23:48,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 610 transitions. [2023-08-31 22:23:48,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:48,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 610 transitions. [2023-08-31 22:23:48,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 67.77777777777777) internal successors, (610), 9 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 22:23:48,049 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 22:23:48,050 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 22:23:48,050 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 242 flow. Second operand 9 states and 610 transitions. [2023-08-31 22:23:48,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 536 flow [2023-08-31 22:23:48,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 514 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-31 22:23:48,054 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 330 flow [2023-08-31 22:23:48,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2023-08-31 22:23:48,055 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 31 predicate places. [2023-08-31 22:23:48,055 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 330 flow [2023-08-31 22:23:48,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.666666666666664) internal successors, (382), 6 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:23:48,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:48,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:48,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:48,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:48,265 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 22:23:48,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2065211485, now seen corresponding path program 2 times [2023-08-31 22:23:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:48,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132908110] [2023-08-31 22:23:48,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:48,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:48,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:48,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:48,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-31 22:23:48,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 22:23:48,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:48,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:23:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:48,380 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 22:23:48,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:48,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:48,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132908110] [2023-08-31 22:23:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132908110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:48,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:48,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:48,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194507627] [2023-08-31 22:23:48,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:48,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:48,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:48,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:48,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 63.666666666666664) internal successors, (382), 6 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:23:48,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:48,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:48,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:48,555 INFO L130 PetriNetUnfolder]: 168/299 cut-off events. [2023-08-31 22:23:48,555 INFO L131 PetriNetUnfolder]: For 1657/1657 co-relation queries the response was YES. [2023-08-31 22:23:48,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1391 conditions, 299 events. 168/299 cut-off events. For 1657/1657 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1074 event pairs, 45 based on Foata normal form. 8/307 useless extension candidates. Maximal degree in co-relation 1369. Up to 137 conditions per place. [2023-08-31 22:23:48,557 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 38 selfloop transitions, 15 changer transitions 6/59 dead transitions. [2023-08-31 22:23:48,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 59 transitions, 593 flow [2023-08-31 22:23:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:23:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:23:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2023-08-31 22:23:48,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-08-31 22:23:48,560 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2023-08-31 22:23:48,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2023-08-31 22:23:48,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:48,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2023-08-31 22:23:48,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 22:23:48,563 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 22:23:48,564 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 22:23:48,564 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 330 flow. Second operand 7 states and 476 transitions. [2023-08-31 22:23:48,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 59 transitions, 593 flow [2023-08-31 22:23:48,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 522 flow, removed 26 selfloop flow, removed 4 redundant places. [2023-08-31 22:23:48,571 INFO L231 Difference]: Finished difference. Result has 59 places, 40 transitions, 343 flow [2023-08-31 22:23:48,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=59, PETRI_TRANSITIONS=40} [2023-08-31 22:23:48,572 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 35 predicate places. [2023-08-31 22:23:48,572 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 40 transitions, 343 flow [2023-08-31 22:23:48,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.666666666666664) internal successors, (382), 6 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:23:48,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:48,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:48,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:48,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:48,782 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 22:23:48,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:48,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2065927585, now seen corresponding path program 3 times [2023-08-31 22:23:48,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:48,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247575855] [2023-08-31 22:23:48,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:23:48,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:48,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:48,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:48,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-31 22:23:48,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 22:23:48,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:48,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:48,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:48,928 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 22:23:48,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:48,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:48,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247575855] [2023-08-31 22:23:48,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247575855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:48,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:48,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231414910] [2023-08-31 22:23:48,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:48,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:48,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:48,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:48,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 40 transitions, 343 flow. Second operand has 6 states, 6 states have (on average 63.666666666666664) internal successors, (382), 6 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:23:48,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:48,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:48,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:49,126 INFO L130 PetriNetUnfolder]: 164/295 cut-off events. [2023-08-31 22:23:49,126 INFO L131 PetriNetUnfolder]: For 1808/1808 co-relation queries the response was YES. [2023-08-31 22:23:49,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1340 conditions, 295 events. 164/295 cut-off events. For 1808/1808 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1103 event pairs, 46 based on Foata normal form. 8/303 useless extension candidates. Maximal degree in co-relation 1316. Up to 222 conditions per place. [2023-08-31 22:23:49,128 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 44 selfloop transitions, 9 changer transitions 9/62 dead transitions. [2023-08-31 22:23:49,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 571 flow [2023-08-31 22:23:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:23:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:23:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2023-08-31 22:23:49,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-08-31 22:23:49,131 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2023-08-31 22:23:49,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2023-08-31 22:23:49,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:49,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2023-08-31 22:23:49,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 22:23:49,134 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 22:23:49,134 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 22:23:49,134 INFO L175 Difference]: Start difference. First operand has 59 places, 40 transitions, 343 flow. Second operand 7 states and 476 transitions. [2023-08-31 22:23:49,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 571 flow [2023-08-31 22:23:49,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 541 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-31 22:23:49,144 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 367 flow [2023-08-31 22:23:49,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=367, PETRI_PLACES=64, PETRI_TRANSITIONS=42} [2023-08-31 22:23:49,145 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 40 predicate places. [2023-08-31 22:23:49,145 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 367 flow [2023-08-31 22:23:49,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.666666666666664) internal successors, (382), 6 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:23:49,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:49,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:49,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:49,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:49,360 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 22:23:49,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2065153825, now seen corresponding path program 4 times [2023-08-31 22:23:49,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:49,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33854570] [2023-08-31 22:23:49,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:23:49,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:49,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:49,363 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:49,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-31 22:23:49,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:23:49,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:49,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:23:49,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:49,477 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 22:23:49,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:49,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:49,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33854570] [2023-08-31 22:23:49,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33854570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:49,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:49,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:49,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388500675] [2023-08-31 22:23:49,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:49,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:49,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:49,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:49,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:49,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:49,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 42 transitions, 367 flow. Second operand has 6 states, 6 states have (on average 63.666666666666664) internal successors, (382), 6 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:23:49,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:49,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:49,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:49,638 INFO L130 PetriNetUnfolder]: 176/315 cut-off events. [2023-08-31 22:23:49,638 INFO L131 PetriNetUnfolder]: For 2117/2117 co-relation queries the response was YES. [2023-08-31 22:23:49,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 315 events. 176/315 cut-off events. For 2117/2117 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1176 event pairs, 53 based on Foata normal form. 4/319 useless extension candidates. Maximal degree in co-relation 1458. Up to 177 conditions per place. [2023-08-31 22:23:49,640 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 41 selfloop transitions, 16 changer transitions 8/65 dead transitions. [2023-08-31 22:23:49,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 643 flow [2023-08-31 22:23:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:23:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:23:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 475 transitions. [2023-08-31 22:23:49,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4712301587301587 [2023-08-31 22:23:49,643 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 475 transitions. [2023-08-31 22:23:49,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 475 transitions. [2023-08-31 22:23:49,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:49,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 475 transitions. [2023-08-31 22:23:49,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.85714285714286) internal successors, (475), 7 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:49,646 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 22:23:49,646 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 22:23:49,646 INFO L175 Difference]: Start difference. First operand has 64 places, 42 transitions, 367 flow. Second operand 7 states and 475 transitions. [2023-08-31 22:23:49,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 643 flow [2023-08-31 22:23:49,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 617 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-31 22:23:49,654 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 438 flow [2023-08-31 22:23:49,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-31 22:23:49,654 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 44 predicate places. [2023-08-31 22:23:49,655 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 438 flow [2023-08-31 22:23:49,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.666666666666664) internal successors, (382), 6 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:23:49,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:49,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:49,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:49,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:49,864 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 22:23:49,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 402976459, now seen corresponding path program 5 times [2023-08-31 22:23:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:49,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795640684] [2023-08-31 22:23:49,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:23:49,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:49,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:49,865 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:49,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-31 22:23:49,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:49,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:49,982 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 22:23:49,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:50,166 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 22:23:50,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:50,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795640684] [2023-08-31 22:23:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795640684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:50,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:50,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:23:50,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687188025] [2023-08-31 22:23:50,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:50,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:23:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:23:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:23:50,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:50,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 438 flow. Second operand has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 12 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 22:23:50,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:50,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:50,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:50,881 INFO L130 PetriNetUnfolder]: 224/395 cut-off events. [2023-08-31 22:23:50,882 INFO L131 PetriNetUnfolder]: For 4433/4433 co-relation queries the response was YES. [2023-08-31 22:23:50,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2055 conditions, 395 events. 224/395 cut-off events. For 4433/4433 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1510 event pairs, 12 based on Foata normal form. 16/411 useless extension candidates. Maximal degree in co-relation 2027. Up to 99 conditions per place. [2023-08-31 22:23:50,884 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 36 selfloop transitions, 43 changer transitions 26/105 dead transitions. [2023-08-31 22:23:50,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 105 transitions, 1130 flow [2023-08-31 22:23:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:23:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:23:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2023-08-31 22:23:50,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4683159722222222 [2023-08-31 22:23:50,888 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2023-08-31 22:23:50,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2023-08-31 22:23:50,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:50,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2023-08-31 22:23:50,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.4375) internal successors, (1079), 16 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states 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 22:23:50,895 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 22:23:50,896 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 22:23:50,896 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 438 flow. Second operand 16 states and 1079 transitions. [2023-08-31 22:23:50,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 105 transitions, 1130 flow [2023-08-31 22:23:50,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 1081 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-31 22:23:50,909 INFO L231 Difference]: Finished difference. Result has 84 places, 61 transitions, 837 flow [2023-08-31 22:23:50,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=837, PETRI_PLACES=84, PETRI_TRANSITIONS=61} [2023-08-31 22:23:50,911 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 60 predicate places. [2023-08-31 22:23:50,911 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 61 transitions, 837 flow [2023-08-31 22:23:50,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 12 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 22:23:50,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:50,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:50,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:51,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:51,117 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 22:23:51,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:51,117 INFO L85 PathProgramCache]: Analyzing trace with hash 380812761, now seen corresponding path program 6 times [2023-08-31 22:23:51,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:51,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133359697] [2023-08-31 22:23:51,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:23:51,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:51,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:51,119 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:51,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-31 22:23:51,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 22:23:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:51,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:51,244 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 22:23:51,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:51,404 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 22:23:51,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:51,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133359697] [2023-08-31 22:23:51,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133359697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:51,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:51,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:23:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574367579] [2023-08-31 22:23:51,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:51,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:23:51,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:23:51,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:23:51,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:51,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 61 transitions, 837 flow. Second operand has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 12 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 22:23:51,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:51,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:51,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:51,907 INFO L130 PetriNetUnfolder]: 248/443 cut-off events. [2023-08-31 22:23:51,907 INFO L131 PetriNetUnfolder]: For 7883/7883 co-relation queries the response was YES. [2023-08-31 22:23:51,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2616 conditions, 443 events. 248/443 cut-off events. For 7883/7883 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1711 event pairs, 63 based on Foata normal form. 24/467 useless extension candidates. Maximal degree in co-relation 2583. Up to 281 conditions per place. [2023-08-31 22:23:51,911 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 63 selfloop transitions, 19 changer transitions 19/101 dead transitions. [2023-08-31 22:23:51,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 101 transitions, 1393 flow [2023-08-31 22:23:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 22:23:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 22:23:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 809 transitions. [2023-08-31 22:23:51,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681712962962963 [2023-08-31 22:23:51,915 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 809 transitions. [2023-08-31 22:23:51,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 809 transitions. [2023-08-31 22:23:51,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:51,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 809 transitions. [2023-08-31 22:23:51,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 67.41666666666667) internal successors, (809), 12 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 22:23:51,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 22:23:51,921 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 22:23:51,921 INFO L175 Difference]: Start difference. First operand has 84 places, 61 transitions, 837 flow. Second operand 12 states and 809 transitions. [2023-08-31 22:23:51,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 101 transitions, 1393 flow [2023-08-31 22:23:51,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 101 transitions, 1033 flow, removed 161 selfloop flow, removed 9 redundant places. [2023-08-31 22:23:51,939 INFO L231 Difference]: Finished difference. Result has 92 places, 67 transitions, 738 flow [2023-08-31 22:23:51,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=738, PETRI_PLACES=92, PETRI_TRANSITIONS=67} [2023-08-31 22:23:51,940 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 68 predicate places. [2023-08-31 22:23:51,940 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 67 transitions, 738 flow [2023-08-31 22:23:51,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 12 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 22:23:51,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:51,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:51,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:52,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:52,151 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 22:23:52,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash 404049741, now seen corresponding path program 7 times [2023-08-31 22:23:52,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:52,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491110476] [2023-08-31 22:23:52,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 22:23:52,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:52,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:52,154 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:52,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-31 22:23:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:52,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:52,281 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 22:23:52,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:52,441 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 22:23:52,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:52,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491110476] [2023-08-31 22:23:52,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491110476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:52,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:52,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:23:52,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317282155] [2023-08-31 22:23:52,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:52,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:23:52,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:52,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:23:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:23:52,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:52,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 67 transitions, 738 flow. Second operand has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 12 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 22:23:52,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:52,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:52,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:53,202 INFO L130 PetriNetUnfolder]: 336/603 cut-off events. [2023-08-31 22:23:53,203 INFO L131 PetriNetUnfolder]: For 12794/12794 co-relation queries the response was YES. [2023-08-31 22:23:53,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 603 events. 336/603 cut-off events. For 12794/12794 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2591 event pairs, 62 based on Foata normal form. 24/627 useless extension candidates. Maximal degree in co-relation 3588. Up to 248 conditions per place. [2023-08-31 22:23:53,208 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 81 selfloop transitions, 37 changer transitions 14/132 dead transitions. [2023-08-31 22:23:53,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1675 flow [2023-08-31 22:23:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:23:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:23:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2023-08-31 22:23:53,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4683159722222222 [2023-08-31 22:23:53,215 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2023-08-31 22:23:53,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2023-08-31 22:23:53,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:53,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2023-08-31 22:23:53,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.4375) internal successors, (1079), 16 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states 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 22:23:53,223 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 22:23:53,224 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 22:23:53,224 INFO L175 Difference]: Start difference. First operand has 92 places, 67 transitions, 738 flow. Second operand 16 states and 1079 transitions. [2023-08-31 22:23:53,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1675 flow [2023-08-31 22:23:53,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 132 transitions, 1572 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-08-31 22:23:53,246 INFO L231 Difference]: Finished difference. Result has 111 places, 81 transitions, 1071 flow [2023-08-31 22:23:53,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1071, PETRI_PLACES=111, PETRI_TRANSITIONS=81} [2023-08-31 22:23:53,247 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 87 predicate places. [2023-08-31 22:23:53,247 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 81 transitions, 1071 flow [2023-08-31 22:23:53,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 12 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 22:23:53,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:53,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:53,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:53,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:53,458 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 22:23:53,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:53,459 INFO L85 PathProgramCache]: Analyzing trace with hash 404765841, now seen corresponding path program 8 times [2023-08-31 22:23:53,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:53,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053842600] [2023-08-31 22:23:53,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:53,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:53,461 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:53,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-31 22:23:53,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:53,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:53,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:53,589 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 22:23:53,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:53,767 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 22:23:53,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:53,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053842600] [2023-08-31 22:23:53,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053842600] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:53,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:53,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:23:53,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411465354] [2023-08-31 22:23:53,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:53,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:23:53,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:23:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:23:53,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:53,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 81 transitions, 1071 flow. Second operand has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 12 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 22:23:53,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:53,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:53,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:54,592 INFO L130 PetriNetUnfolder]: 384/691 cut-off events. [2023-08-31 22:23:54,592 INFO L131 PetriNetUnfolder]: For 24504/24504 co-relation queries the response was YES. [2023-08-31 22:23:54,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4872 conditions, 691 events. 384/691 cut-off events. For 24504/24504 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3071 event pairs, 33 based on Foata normal form. 32/723 useless extension candidates. Maximal degree in co-relation 4827. Up to 216 conditions per place. [2023-08-31 22:23:54,597 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 57 selfloop transitions, 70 changer transitions 30/157 dead transitions. [2023-08-31 22:23:54,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 157 transitions, 2462 flow [2023-08-31 22:23:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 22:23:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 22:23:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1213 transitions. [2023-08-31 22:23:54,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679783950617284 [2023-08-31 22:23:54,601 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1213 transitions. [2023-08-31 22:23:54,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1213 transitions. [2023-08-31 22:23:54,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:54,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1213 transitions. [2023-08-31 22:23:54,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.38888888888889) internal successors, (1213), 18 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states 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 22:23:54,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 22:23:54,609 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 22:23:54,609 INFO L175 Difference]: Start difference. First operand has 111 places, 81 transitions, 1071 flow. Second operand 18 states and 1213 transitions. [2023-08-31 22:23:54,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 157 transitions, 2462 flow [2023-08-31 22:23:54,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 157 transitions, 2111 flow, removed 161 selfloop flow, removed 7 redundant places. [2023-08-31 22:23:54,660 INFO L231 Difference]: Finished difference. Result has 131 places, 103 transitions, 1585 flow [2023-08-31 22:23:54,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1585, PETRI_PLACES=131, PETRI_TRANSITIONS=103} [2023-08-31 22:23:54,661 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 107 predicate places. [2023-08-31 22:23:54,661 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 103 transitions, 1585 flow [2023-08-31 22:23:54,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 12 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 22:23:54,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:54,662 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:54,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:54,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:54,871 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 22:23:54,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1570592883, now seen corresponding path program 9 times [2023-08-31 22:23:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:54,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271530700] [2023-08-31 22:23:54,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:23:54,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:54,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:54,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:54,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-31 22:23:54,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 22:23:54,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:54,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:23:54,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:55,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:55,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:55,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271530700] [2023-08-31 22:23:55,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271530700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:55,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:55,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-31 22:23:55,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676456589] [2023-08-31 22:23:55,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:55,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:23:55,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:55,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:23:55,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:23:55,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:55,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 103 transitions, 1585 flow. Second operand has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 22:23:55,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:55,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:55,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:56,777 INFO L130 PetriNetUnfolder]: 488/891 cut-off events. [2023-08-31 22:23:56,778 INFO L131 PetriNetUnfolder]: For 43601/43601 co-relation queries the response was YES. [2023-08-31 22:23:56,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7103 conditions, 891 events. 488/891 cut-off events. For 43601/43601 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4317 event pairs, 88 based on Foata normal form. 32/923 useless extension candidates. Maximal degree in co-relation 7049. Up to 401 conditions per place. [2023-08-31 22:23:56,797 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 99 selfloop transitions, 63 changer transitions 43/205 dead transitions. [2023-08-31 22:23:56,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 205 transitions, 3412 flow [2023-08-31 22:23:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 22:23:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 22:23:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1610 transitions. [2023-08-31 22:23:56,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46585648148148145 [2023-08-31 22:23:56,802 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1610 transitions. [2023-08-31 22:23:56,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1610 transitions. [2023-08-31 22:23:56,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:56,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1610 transitions. [2023-08-31 22:23:56,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.08333333333333) internal successors, (1610), 24 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 22:23:56,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states 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 22:23:56,814 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states 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 22:23:56,815 INFO L175 Difference]: Start difference. First operand has 131 places, 103 transitions, 1585 flow. Second operand 24 states and 1610 transitions. [2023-08-31 22:23:56,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 205 transitions, 3412 flow [2023-08-31 22:23:56,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 205 transitions, 2935 flow, removed 222 selfloop flow, removed 8 redundant places. [2023-08-31 22:23:56,893 INFO L231 Difference]: Finished difference. Result has 158 places, 130 transitions, 2082 flow [2023-08-31 22:23:56,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2082, PETRI_PLACES=158, PETRI_TRANSITIONS=130} [2023-08-31 22:23:56,894 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 134 predicate places. [2023-08-31 22:23:56,894 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 130 transitions, 2082 flow [2023-08-31 22:23:56,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 22:23:56,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:56,895 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:56,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:57,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:57,104 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 22:23:57,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:57,105 INFO L85 PathProgramCache]: Analyzing trace with hash -925720759, now seen corresponding path program 10 times [2023-08-31 22:23:57,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:57,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888688505] [2023-08-31 22:23:57,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:23:57,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:23:57,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:57,106 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:23:57,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-31 22:23:57,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:23:57,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:23:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:57,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:23:57,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:57,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888688505] [2023-08-31 22:23:57,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888688505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:57,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:57,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-31 22:23:57,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444663024] [2023-08-31 22:23:57,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:57,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:23:57,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:57,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:23:57,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:23:57,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:57,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 130 transitions, 2082 flow. Second operand has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 22:23:57,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:57,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:57,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:00,026 INFO L130 PetriNetUnfolder]: 692/1267 cut-off events. [2023-08-31 22:24:00,026 INFO L131 PetriNetUnfolder]: For 76869/76869 co-relation queries the response was YES. [2023-08-31 22:24:00,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12235 conditions, 1267 events. 692/1267 cut-off events. For 76869/76869 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6365 event pairs, 38 based on Foata normal form. 32/1299 useless extension candidates. Maximal degree in co-relation 12171. Up to 444 conditions per place. [2023-08-31 22:24:00,037 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 110 selfloop transitions, 147 changer transitions 27/284 dead transitions. [2023-08-31 22:24:00,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 284 transitions, 5875 flow [2023-08-31 22:24:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 22:24:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 22:24:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2344 transitions. [2023-08-31 22:24:00,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650793650793651 [2023-08-31 22:24:00,042 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2344 transitions. [2023-08-31 22:24:00,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2344 transitions. [2023-08-31 22:24:00,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:24:00,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2344 transitions. [2023-08-31 22:24:00,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.97142857142858) internal successors, (2344), 35 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states 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 22:24:00,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 144.0) internal successors, (5184), 36 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states 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 22:24:00,053 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 144.0) internal successors, (5184), 36 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states 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 22:24:00,053 INFO L175 Difference]: Start difference. First operand has 158 places, 130 transitions, 2082 flow. Second operand 35 states and 2344 transitions. [2023-08-31 22:24:00,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 284 transitions, 5875 flow [2023-08-31 22:24:00,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 284 transitions, 5148 flow, removed 341 selfloop flow, removed 10 redundant places. [2023-08-31 22:24:00,155 INFO L231 Difference]: Finished difference. Result has 196 places, 191 transitions, 4139 flow [2023-08-31 22:24:00,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4139, PETRI_PLACES=196, PETRI_TRANSITIONS=191} [2023-08-31 22:24:00,156 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 172 predicate places. [2023-08-31 22:24:00,156 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 191 transitions, 4139 flow [2023-08-31 22:24:00,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 22:24:00,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:24:00,157 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:24:00,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-31 22:24:00,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:00,363 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 22:24:00,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:24:00,363 INFO L85 PathProgramCache]: Analyzing trace with hash -925004659, now seen corresponding path program 11 times [2023-08-31 22:24:00,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:24:00,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314594551] [2023-08-31 22:24:00,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:24:00,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:00,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:24:00,365 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:24:00,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-31 22:24:00,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 22:24:00,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:24:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:24:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:24:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:24:00,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:24:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:24:00,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:24:00,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314594551] [2023-08-31 22:24:00,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314594551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:24:00,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:24:00,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-31 22:24:00,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242678957] [2023-08-31 22:24:00,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:24:00,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:24:00,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:24:00,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:24:00,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:24:01,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:24:01,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 191 transitions, 4139 flow. Second operand has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 22:24:01,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:24:01,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:24:01,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:02,862 INFO L130 PetriNetUnfolder]: 756/1383 cut-off events. [2023-08-31 22:24:02,862 INFO L131 PetriNetUnfolder]: For 116743/116743 co-relation queries the response was YES. [2023-08-31 22:24:02,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14555 conditions, 1383 events. 756/1383 cut-off events. For 116743/116743 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7128 event pairs, 30 based on Foata normal form. 40/1423 useless extension candidates. Maximal degree in co-relation 14476. Up to 492 conditions per place. [2023-08-31 22:24:02,877 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 84 selfloop transitions, 162 changer transitions 54/300 dead transitions. [2023-08-31 22:24:02,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 300 transitions, 6668 flow [2023-08-31 22:24:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 22:24:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 22:24:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2014 transitions. [2023-08-31 22:24:02,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46620370370370373 [2023-08-31 22:24:02,881 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2014 transitions. [2023-08-31 22:24:02,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2014 transitions. [2023-08-31 22:24:02,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:24:02,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2014 transitions. [2023-08-31 22:24:02,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 67.13333333333334) internal successors, (2014), 30 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states 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 22:24:02,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 144.0) internal successors, (4464), 31 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states 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 22:24:02,915 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 144.0) internal successors, (4464), 31 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states 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 22:24:02,915 INFO L175 Difference]: Start difference. First operand has 196 places, 191 transitions, 4139 flow. Second operand 30 states and 2014 transitions. [2023-08-31 22:24:02,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 300 transitions, 6668 flow [2023-08-31 22:24:03,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 300 transitions, 4781 flow, removed 891 selfloop flow, removed 17 redundant places. [2023-08-31 22:24:03,235 INFO L231 Difference]: Finished difference. Result has 212 places, 209 transitions, 3497 flow [2023-08-31 22:24:03,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3497, PETRI_PLACES=212, PETRI_TRANSITIONS=209} [2023-08-31 22:24:03,235 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 188 predicate places. [2023-08-31 22:24:03,236 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 209 transitions, 3497 flow [2023-08-31 22:24:03,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 22:24:03,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:24:03,236 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:24:03,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-31 22:24:03,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:03,440 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 22:24:03,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:24:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2014607281, now seen corresponding path program 12 times [2023-08-31 22:24:03,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:24:03,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176121700] [2023-08-31 22:24:03,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:24:03,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:03,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:24:03,442 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:24:03,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-31 22:24:03,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 22:24:03,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:24:03,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:24:03,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:24:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:24:03,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:24:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:24:03,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:24:03,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176121700] [2023-08-31 22:24:03,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176121700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:24:03,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:24:03,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-31 22:24:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923434249] [2023-08-31 22:24:03,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:24:03,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:24:03,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:24:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:24:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:24:03,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:24:03,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 209 transitions, 3497 flow. Second operand has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 22:24:03,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:24:03,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:24:03,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:05,429 INFO L130 PetriNetUnfolder]: 840/1523 cut-off events. [2023-08-31 22:24:05,429 INFO L131 PetriNetUnfolder]: For 112483/112483 co-relation queries the response was YES. [2023-08-31 22:24:05,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14600 conditions, 1523 events. 840/1523 cut-off events. For 112483/112483 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7801 event pairs, 54 based on Foata normal form. 28/1551 useless extension candidates. Maximal degree in co-relation 14519. Up to 424 conditions per place. [2023-08-31 22:24:05,439 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 96 selfloop transitions, 176 changer transitions 50/322 dead transitions. [2023-08-31 22:24:05,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 322 transitions, 6365 flow [2023-08-31 22:24:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 22:24:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 22:24:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1880 transitions. [2023-08-31 22:24:05,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662698412698413 [2023-08-31 22:24:05,442 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1880 transitions. [2023-08-31 22:24:05,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1880 transitions. [2023-08-31 22:24:05,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:24:05,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1880 transitions. [2023-08-31 22:24:05,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 67.14285714285714) internal successors, (1880), 28 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states 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 22:24:05,449 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 22:24:05,449 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 22:24:05,449 INFO L175 Difference]: Start difference. First operand has 212 places, 209 transitions, 3497 flow. Second operand 28 states and 1880 transitions. [2023-08-31 22:24:05,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 322 transitions, 6365 flow [2023-08-31 22:24:05,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 322 transitions, 5818 flow, removed 215 selfloop flow, removed 19 redundant places. [2023-08-31 22:24:05,662 INFO L231 Difference]: Finished difference. Result has 236 places, 232 transitions, 4493 flow [2023-08-31 22:24:05,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4493, PETRI_PLACES=236, PETRI_TRANSITIONS=232} [2023-08-31 22:24:05,662 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 212 predicate places. [2023-08-31 22:24:05,662 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 232 transitions, 4493 flow [2023-08-31 22:24:05,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 22:24:05,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:24:05,663 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:24:05,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-31 22:24:05,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:05,869 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 22:24:05,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:24:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 790771329, now seen corresponding path program 13 times [2023-08-31 22:24:05,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:24:05,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246796833] [2023-08-31 22:24:05,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 22:24:05,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:05,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:24:05,871 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:24:05,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-31 22:24:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:24:05,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 22:24:05,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:24:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:06,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:24:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:06,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:24:06,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246796833] [2023-08-31 22:24:06,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246796833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:24:06,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:24:06,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2023-08-31 22:24:06,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483120607] [2023-08-31 22:24:06,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:24:06,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 22:24:06,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:24:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 22:24:06,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2023-08-31 22:24:07,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:24:07,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 232 transitions, 4493 flow. Second operand has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:07,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:24:07,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:24:07,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:12,816 INFO L130 PetriNetUnfolder]: 924/1663 cut-off events. [2023-08-31 22:24:12,816 INFO L131 PetriNetUnfolder]: For 171852/171852 co-relation queries the response was YES. [2023-08-31 22:24:12,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18483 conditions, 1663 events. 924/1663 cut-off events. For 171852/171852 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8305 event pairs, 12 based on Foata normal form. 28/1691 useless extension candidates. Maximal degree in co-relation 18391. Up to 480 conditions per place. [2023-08-31 22:24:12,829 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 95 selfloop transitions, 217 changer transitions 102/414 dead transitions. [2023-08-31 22:24:12,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 414 transitions, 9487 flow [2023-08-31 22:24:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-31 22:24:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-31 22:24:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3609 transitions. [2023-08-31 22:24:12,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46412037037037035 [2023-08-31 22:24:12,832 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3609 transitions. [2023-08-31 22:24:12,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3609 transitions. [2023-08-31 22:24:12,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:24:12,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3609 transitions. [2023-08-31 22:24:12,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 66.83333333333333) internal successors, (3609), 54 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states 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 22:24:12,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 144.0) internal successors, (7920), 55 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states 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 22:24:12,845 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 144.0) internal successors, (7920), 55 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states 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 22:24:12,845 INFO L175 Difference]: Start difference. First operand has 236 places, 232 transitions, 4493 flow. Second operand 54 states and 3609 transitions. [2023-08-31 22:24:12,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 414 transitions, 9487 flow [2023-08-31 22:24:13,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 414 transitions, 8807 flow, removed 313 selfloop flow, removed 9 redundant places. [2023-08-31 22:24:13,194 INFO L231 Difference]: Finished difference. Result has 294 places, 253 transitions, 5443 flow [2023-08-31 22:24:13,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=5443, PETRI_PLACES=294, PETRI_TRANSITIONS=253} [2023-08-31 22:24:13,195 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 270 predicate places. [2023-08-31 22:24:13,195 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 253 transitions, 5443 flow [2023-08-31 22:24:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:13,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:24:13,195 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:24:13,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-31 22:24:13,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:13,396 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 22:24:13,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:24:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1030732913, now seen corresponding path program 14 times [2023-08-31 22:24:13,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:24:13,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934522724] [2023-08-31 22:24:13,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:24:13,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:13,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:24:13,398 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:24:13,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-31 22:24:13,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:24:13,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:24:13,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 22:24:13,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:24:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:13,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:24:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:14,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:24:14,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934522724] [2023-08-31 22:24:14,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934522724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:24:14,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:24:14,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2023-08-31 22:24:14,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35797870] [2023-08-31 22:24:14,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:24:14,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 22:24:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:24:14,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 22:24:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2023-08-31 22:24:14,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:24:14,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 253 transitions, 5443 flow. Second operand has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:14,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:24:14,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:24:14,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:16,317 INFO L130 PetriNetUnfolder]: 980/1775 cut-off events. [2023-08-31 22:24:16,317 INFO L131 PetriNetUnfolder]: For 253184/253184 co-relation queries the response was YES. [2023-08-31 22:24:16,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22231 conditions, 1775 events. 980/1775 cut-off events. For 253184/253184 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8885 event pairs, 367 based on Foata normal form. 40/1815 useless extension candidates. Maximal degree in co-relation 22125. Up to 1501 conditions per place. [2023-08-31 22:24:16,338 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 263 selfloop transitions, 33 changer transitions 47/343 dead transitions. [2023-08-31 22:24:16,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 343 transitions, 8675 flow [2023-08-31 22:24:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 22:24:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 22:24:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1737 transitions. [2023-08-31 22:24:16,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2023-08-31 22:24:16,342 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1737 transitions. [2023-08-31 22:24:16,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1737 transitions. [2023-08-31 22:24:16,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:24:16,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1737 transitions. [2023-08-31 22:24:16,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.8076923076923) internal successors, (1737), 26 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states 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 22:24:16,348 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 22:24:16,349 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 22:24:16,349 INFO L175 Difference]: Start difference. First operand has 294 places, 253 transitions, 5443 flow. Second operand 26 states and 1737 transitions. [2023-08-31 22:24:16,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 343 transitions, 8675 flow [2023-08-31 22:24:16,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 343 transitions, 6940 flow, removed 617 selfloop flow, removed 43 redundant places. [2023-08-31 22:24:16,859 INFO L231 Difference]: Finished difference. Result has 290 places, 267 transitions, 4832 flow [2023-08-31 22:24:16,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4832, PETRI_PLACES=290, PETRI_TRANSITIONS=267} [2023-08-31 22:24:16,860 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 266 predicate places. [2023-08-31 22:24:16,860 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 267 transitions, 4832 flow [2023-08-31 22:24:16,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:16,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:24:16,862 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:24:16,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-31 22:24:17,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:17,071 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 22:24:17,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:24:17,072 INFO L85 PathProgramCache]: Analyzing trace with hash -229469181, now seen corresponding path program 15 times [2023-08-31 22:24:17,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:24:17,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365969709] [2023-08-31 22:24:17,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:24:17,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:17,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:24:17,073 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:24:17,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-31 22:24:17,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-31 22:24:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:24:17,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 22:24:17,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:24:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:17,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:24:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:17,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:24:17,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365969709] [2023-08-31 22:24:17,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365969709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:24:17,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:24:17,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2023-08-31 22:24:17,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767349338] [2023-08-31 22:24:17,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:24:17,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 22:24:17,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:24:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 22:24:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2023-08-31 22:24:18,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:24:18,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 267 transitions, 4832 flow. Second operand has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:18,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:24:18,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:24:18,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:22,830 INFO L130 PetriNetUnfolder]: 1264/2335 cut-off events. [2023-08-31 22:24:22,831 INFO L131 PetriNetUnfolder]: For 409335/409335 co-relation queries the response was YES. [2023-08-31 22:24:22,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31137 conditions, 2335 events. 1264/2335 cut-off events. For 409335/409335 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12467 event pairs, 335 based on Foata normal form. 40/2375 useless extension candidates. Maximal degree in co-relation 31021. Up to 1316 conditions per place. [2023-08-31 22:24:22,858 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 305 selfloop transitions, 122 changer transitions 59/486 dead transitions. [2023-08-31 22:24:22,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 486 transitions, 12007 flow [2023-08-31 22:24:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 22:24:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 22:24:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3261 transitions. [2023-08-31 22:24:22,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46215986394557823 [2023-08-31 22:24:22,868 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3261 transitions. [2023-08-31 22:24:22,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3261 transitions. [2023-08-31 22:24:22,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:24:22,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3261 transitions. [2023-08-31 22:24:22,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 66.55102040816327) internal successors, (3261), 49 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states 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 22:24:22,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 144.0) internal successors, (7200), 50 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states 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 22:24:22,880 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 144.0) internal successors, (7200), 50 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states 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 22:24:22,881 INFO L175 Difference]: Start difference. First operand has 290 places, 267 transitions, 4832 flow. Second operand 49 states and 3261 transitions. [2023-08-31 22:24:22,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 486 transitions, 12007 flow [2023-08-31 22:24:23,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 486 transitions, 11247 flow, removed 361 selfloop flow, removed 11 redundant places. [2023-08-31 22:24:23,655 INFO L231 Difference]: Finished difference. Result has 352 places, 330 transitions, 7249 flow [2023-08-31 22:24:23,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7249, PETRI_PLACES=352, PETRI_TRANSITIONS=330} [2023-08-31 22:24:23,656 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 328 predicate places. [2023-08-31 22:24:23,656 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 330 transitions, 7249 flow [2023-08-31 22:24:23,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:23,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:24:23,656 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:24:23,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-08-31 22:24:23,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:23,857 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 22:24:23,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:24:23,857 INFO L85 PathProgramCache]: Analyzing trace with hash -912191537, now seen corresponding path program 16 times [2023-08-31 22:24:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:24:23,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919351952] [2023-08-31 22:24:23,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:24:23,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:23,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:24:23,859 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:24:23,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-31 22:24:23,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:24:23,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:24:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 22:24:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:24:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:24,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:24:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:24,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:24:24,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919351952] [2023-08-31 22:24:24,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919351952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:24:24,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:24:24,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2023-08-31 22:24:24,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998013799] [2023-08-31 22:24:24,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:24:24,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 22:24:24,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:24:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 22:24:24,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2023-08-31 22:24:25,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:24:25,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 330 transitions, 7249 flow. Second operand has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:25,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:24:25,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:24:25,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:33,526 INFO L130 PetriNetUnfolder]: 1872/3451 cut-off events. [2023-08-31 22:24:33,527 INFO L131 PetriNetUnfolder]: For 926017/926017 co-relation queries the response was YES. [2023-08-31 22:24:33,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57384 conditions, 3451 events. 1872/3451 cut-off events. For 926017/926017 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 19912 event pairs, 65 based on Foata normal form. 56/3507 useless extension candidates. Maximal degree in co-relation 57243. Up to 1244 conditions per place. [2023-08-31 22:24:33,572 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 217 selfloop transitions, 423 changer transitions 63/703 dead transitions. [2023-08-31 22:24:33,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 703 transitions, 22061 flow [2023-08-31 22:24:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-31 22:24:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-31 22:24:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4667 transitions. [2023-08-31 22:24:33,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46299603174603177 [2023-08-31 22:24:33,579 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4667 transitions. [2023-08-31 22:24:33,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4667 transitions. [2023-08-31 22:24:33,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:24:33,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4667 transitions. [2023-08-31 22:24:33,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 66.67142857142858) internal successors, (4667), 70 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states 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 22:24:33,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 144.0) internal successors, (10224), 71 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states 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 22:24:33,596 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 144.0) internal successors, (10224), 71 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states 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 22:24:33,596 INFO L175 Difference]: Start difference. First operand has 352 places, 330 transitions, 7249 flow. Second operand 70 states and 4667 transitions. [2023-08-31 22:24:33,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 703 transitions, 22061 flow [2023-08-31 22:24:35,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 703 transitions, 19579 flow, removed 1195 selfloop flow, removed 21 redundant places. [2023-08-31 22:24:35,329 INFO L231 Difference]: Finished difference. Result has 424 places, 513 transitions, 15746 flow [2023-08-31 22:24:35,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5167, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=15746, PETRI_PLACES=424, PETRI_TRANSITIONS=513} [2023-08-31 22:24:35,331 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 400 predicate places. [2023-08-31 22:24:35,331 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 513 transitions, 15746 flow [2023-08-31 22:24:35,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:35,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:24:35,331 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:24:35,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-31 22:24:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:35,534 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:24:35,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:24:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash -314878821, now seen corresponding path program 17 times [2023-08-31 22:24:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:24:35,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966544532] [2023-08-31 22:24:35,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:24:35,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:35,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:24:35,536 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:24:35,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-31 22:24:35,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-31 22:24:35,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:24:35,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 22:24:35,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:24:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:35,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:24:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:24:36,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:24:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966544532] [2023-08-31 22:24:36,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966544532] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:24:36,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:24:36,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2023-08-31 22:24:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273704795] [2023-08-31 22:24:36,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:24:36,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 22:24:36,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:24:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 22:24:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2023-08-31 22:24:36,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:24:36,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 513 transitions, 15746 flow. Second operand has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:36,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:24:36,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:24:36,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:41,399 INFO L130 PetriNetUnfolder]: 1892/3487 cut-off events. [2023-08-31 22:24:41,399 INFO L131 PetriNetUnfolder]: For 1406781/1406781 co-relation queries the response was YES. [2023-08-31 22:24:41,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63734 conditions, 3487 events. 1892/3487 cut-off events. For 1406781/1406781 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 20098 event pairs, 27 based on Foata normal form. 96/3583 useless extension candidates. Maximal degree in co-relation 63572. Up to 1260 conditions per place. [2023-08-31 22:24:41,440 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 133 selfloop transitions, 456 changer transitions 90/679 dead transitions. [2023-08-31 22:24:41,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 679 transitions, 23596 flow [2023-08-31 22:24:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-31 22:24:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-31 22:24:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3213 transitions. [2023-08-31 22:24:41,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46484375 [2023-08-31 22:24:41,445 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3213 transitions. [2023-08-31 22:24:41,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3213 transitions. [2023-08-31 22:24:41,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:24:41,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3213 transitions. [2023-08-31 22:24:41,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 66.9375) internal successors, (3213), 48 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states 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 22:24:41,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 144.0) internal successors, (7056), 49 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states 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 22:24:41,455 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 144.0) internal successors, (7056), 49 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states 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 22:24:41,455 INFO L175 Difference]: Start difference. First operand has 424 places, 513 transitions, 15746 flow. Second operand 48 states and 3213 transitions. [2023-08-31 22:24:41,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 679 transitions, 23596 flow [2023-08-31 22:24:44,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 679 transitions, 14594 flow, removed 4368 selfloop flow, removed 26 redundant places. [2023-08-31 22:24:44,766 INFO L231 Difference]: Finished difference. Result has 450 places, 525 transitions, 10644 flow [2023-08-31 22:24:44,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=7468, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=10644, PETRI_PLACES=450, PETRI_TRANSITIONS=525} [2023-08-31 22:24:44,768 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 426 predicate places. [2023-08-31 22:24:44,768 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 525 transitions, 10644 flow [2023-08-31 22:24:44,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.3125) internal successors, (2026), 32 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states 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 22:24:44,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:24:44,769 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:24:44,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-08-31 22:24:44,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:44,969 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-31 22:24:44,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:24:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash -888381091, now seen corresponding path program 18 times [2023-08-31 22:24:44,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:24:44,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980102085] [2023-08-31 22:24:44,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:24:44,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:24:44,971 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:24:44,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-31 22:24:45,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-31 22:24:45,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-08-31 22:24:45,094 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:24:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:24:45,197 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-31 22:24:45,198 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:24:45,198 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (7 of 8 remaining) [2023-08-31 22:24:45,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-31 22:24:45,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-31 22:24:45,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-31 22:24:45,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-08-31 22:24:45,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-31 22:24:45,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 8 remaining) [2023-08-31 22:24:45,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 8 remaining) [2023-08-31 22:24:45,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-31 22:24:45,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:24:45,412 INFO L445 BasicCegarLoop]: Path program histogram: [18, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 22:24:45,415 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:24:45,415 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:24:45,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:24:45 BasicIcfg [2023-08-31 22:24:45,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:24:45,469 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:24:45,469 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:24:45,470 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:24:45,470 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:35" (3/4) ... [2023-08-31 22:24:45,481 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:24:45,481 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:24:45,482 INFO L158 Benchmark]: Toolchain (without parser) took 71120.59ms. Allocated memory was 67.1MB in the beginning and 882.9MB in the end (delta: 815.8MB). Free memory was 43.7MB in the beginning and 452.4MB in the end (delta: -408.8MB). Peak memory consumption was 407.0MB. Max. memory is 16.1GB. [2023-08-31 22:24:45,482 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 67.1MB. Free memory was 44.2MB in the beginning and 44.2MB in the end (delta: 53.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:24:45,482 INFO L158 Benchmark]: CACSL2BoogieTranslator took 480.19ms. Allocated memory was 67.1MB in the beginning and 100.7MB in the end (delta: 33.6MB). Free memory was 43.5MB in the beginning and 73.4MB in the end (delta: -29.9MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2023-08-31 22:24:45,482 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.14ms. Allocated memory is still 100.7MB. Free memory was 73.4MB in the beginning and 71.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:24:45,483 INFO L158 Benchmark]: Boogie Preprocessor took 54.49ms. Allocated memory is still 100.7MB. Free memory was 71.3MB in the beginning and 69.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:24:45,483 INFO L158 Benchmark]: RCFGBuilder took 509.99ms. Allocated memory is still 100.7MB. Free memory was 69.7MB in the beginning and 55.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-08-31 22:24:45,483 INFO L158 Benchmark]: TraceAbstraction took 69997.04ms. Allocated memory was 100.7MB in the beginning and 882.9MB in the end (delta: 782.2MB). Free memory was 54.1MB in the beginning and 453.5MB in the end (delta: -399.4MB). Peak memory consumption was 381.7MB. Max. memory is 16.1GB. [2023-08-31 22:24:45,483 INFO L158 Benchmark]: Witness Printer took 11.66ms. Allocated memory is still 882.9MB. Free memory was 453.5MB in the beginning and 452.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:24:45,485 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 67.1MB. Free memory was 44.2MB in the beginning and 44.2MB in the end (delta: 53.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 480.19ms. Allocated memory was 67.1MB in the beginning and 100.7MB in the end (delta: 33.6MB). Free memory was 43.5MB in the beginning and 73.4MB in the end (delta: -29.9MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.14ms. Allocated memory is still 100.7MB. Free memory was 73.4MB in the beginning and 71.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.49ms. Allocated memory is still 100.7MB. Free memory was 71.3MB in the beginning and 69.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 509.99ms. Allocated memory is still 100.7MB. Free memory was 69.7MB in the beginning and 55.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 69997.04ms. Allocated memory was 100.7MB in the beginning and 882.9MB in the end (delta: 782.2MB). Free memory was 54.1MB in the beginning and 453.5MB in the end (delta: -399.4MB). Peak memory consumption was 381.7MB. Max. memory is 16.1GB. * Witness Printer took 11.66ms. Allocated memory is still 882.9MB. Free memory was 453.5MB in the beginning and 452.4MB in the end (delta: 1.1MB). 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: 3.7s, 75 PlacesBefore, 24 PlacesAfterwards, 73 TransitionsBefore, 20 TransitionsAfterwards, 1254 CoEnabledTransitionPairs, 5 FixpointIterations, 26 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 69 TotalNumberOfCompositions, 1134 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 994, independent: 967, independent conditional: 0, independent unconditional: 967, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 657, independent: 645, independent conditional: 0, independent unconditional: 645, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 994, independent: 322, independent conditional: 0, independent unconditional: 322, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 657, unknown conditional: 0, unknown unconditional: 657] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, 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 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 722. Possible FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=27, arg={0:0}, argc=27, argv={29:28}, argv={29:28}, i=3, id1={7:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-1] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=27, arg={0:0}, arg={0:0}, arg={0:0}, argc=27, argv={29:28}, argv={29:28}, i=3, id1={7:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*10 +6); VAL [\old(argc)=27, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=27, argv={29:28}, argv={29:28}, condI=0, i=7, id1={7:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L719] 0 int condJ = j >= (2*10 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=27, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=27, argv={29:28}, argv={29:28}, condI=0, condJ=1, i=25, id1={7:0}, id2={3:0}, j=26, k=10, k=10] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 711]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 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: 69.8s, OverallIterations: 26, TraceHistogramMax: 10, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 51.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 5717 SdHoareTripleChecker+Valid, 15.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5500 mSDsluCounter, 1863 SdHoareTripleChecker+Invalid, 14.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1801 mSDsCounter, 480 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16419 IncrementalHoareTripleChecker+Invalid, 16906 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 480 mSolverCounterUnsat, 62 mSDtfsCounter, 16419 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 854 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 675 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8858 ImplicationChecksByTransitivity, 26.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15746occurred in iteration=24, InterpolantAutomatonStates: 490, 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: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 464 ConstructedInterpolants, 6 QuantifiedInterpolants, 3576 SizeOfPredicates, 116 NumberOfNonLiveVariables, 1907 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 38 InterpolantComputations, 12 PerfectInterpolantSequences, 8/440 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-31 22:24:45,505 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: UNKNOWN: Overapproximated counterexample