./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/triangular-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-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 9ca4ad6de5ce46f9737c47ccc55c2628eaef135acf1b94c234f6d96d13f1ccb1 --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 22:22:45,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:22:45,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:22:45,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:22:45,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:22:45,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:22:45,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:22:45,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:22:45,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:22:45,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:22:45,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:22:45,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:22:45,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:22:45,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:22:45,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:22:45,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:22:45,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:22:45,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:22:45,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:22:45,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:22:45,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:22:45,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:22:45,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:22:45,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:22:45,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:22:45,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:22:45,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:22:45,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:22:45,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:22:45,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:22:45,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:22:45,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:22:45,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:22:45,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:22:45,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:22:45,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:22:45,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:22:45,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:22:45,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:22:45,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:22:45,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:22:45,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:22:45,869 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:22:45,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:22:45,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:22:45,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:22:45,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:22:45,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:22:45,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:22:45,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:22:45,872 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:22:45,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:22:45,873 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:22:45,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:22:45,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:22:45,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:22:45,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:22:45,874 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:22:45,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:22:45,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:22:45,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:22:45,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:22:45,875 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:22:45,876 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:22:45,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:22:45,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:22:45,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:22:45,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:22:45,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:22:45,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:22:45,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:22:45,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:22:45,877 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:22:45,878 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:22:45,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:22:45,878 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:22:45,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ca4ad6de5ce46f9737c47ccc55c2628eaef135acf1b94c234f6d96d13f1ccb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:22:46,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:22:46,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:22:46,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:22:46,239 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:22:46,239 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:22:46,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2023-08-31 22:22:47,496 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:22:47,767 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:22:47,767 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2023-08-31 22:22:47,780 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a87bbd842/b0d131844f824f6f82c50556db33a642/FLAG62fd1faf8 [2023-08-31 22:22:47,794 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a87bbd842/b0d131844f824f6f82c50556db33a642 [2023-08-31 22:22:47,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:22:47,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:22:47,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:22:47,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:22:47,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:22:47,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:22:47" (1/1) ... [2023-08-31 22:22:47,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@560e66d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:47, skipping insertion in model container [2023-08-31 22:22:47,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:22:47" (1/1) ... [2023-08-31 22:22:47,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:22:47,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:22:48,113 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-2.i[30952,30965] [2023-08-31 22:22:48,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:22:48,129 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:22:48,189 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-2.i[30952,30965] [2023-08-31 22:22:48,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:22:48,225 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:22:48,225 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:22:48,230 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:22:48,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48 WrapperNode [2023-08-31 22:22:48,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:22:48,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:22:48,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:22:48,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:22:48,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,290 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-08-31 22:22:48,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:22:48,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:22:48,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:22:48,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:22:48,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,329 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:22:48,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:22:48,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:22:48,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:22:48,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (1/1) ... [2023-08-31 22:22:48,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:22:48,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:48,370 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 22:22:48,383 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 22:22:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:22:48,404 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:22:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:22:48,404 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:22:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:22:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 22:22:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:22:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:22:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:22:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:22:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 22:22:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:22:48,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:22:48,410 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 22:22:48,508 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:22:48,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:22:48,696 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:22:48,705 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:22:48,708 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:22:48,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:22:48 BoogieIcfgContainer [2023-08-31 22:22:48,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:22:48,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:22:48,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:22:48,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:22:48,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:22:47" (1/3) ... [2023-08-31 22:22:48,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49954e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:22:48, skipping insertion in model container [2023-08-31 22:22:48,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:48" (2/3) ... [2023-08-31 22:22:48,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49954e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:22:48, skipping insertion in model container [2023-08-31 22:22:48,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:22:48" (3/3) ... [2023-08-31 22:22:48,719 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2023-08-31 22:22:48,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:22:48,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-31 22:22:48,734 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:22:48,797 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:22:48,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 74 transitions, 158 flow [2023-08-31 22:22:48,881 INFO L130 PetriNetUnfolder]: 5/72 cut-off events. [2023-08-31 22:22:48,881 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:22:48,886 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 22:22:48,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 74 transitions, 158 flow [2023-08-31 22:22:48,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 150 flow [2023-08-31 22:22:48,893 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:22:48,901 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 72 transitions, 150 flow [2023-08-31 22:22:48,904 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 72 transitions, 150 flow [2023-08-31 22:22:48,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 72 transitions, 150 flow [2023-08-31 22:22:48,931 INFO L130 PetriNetUnfolder]: 5/72 cut-off events. [2023-08-31 22:22:48,934 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:22:48,936 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 22:22:48,938 INFO L119 LiptonReduction]: Number of co-enabled transitions 1254 [2023-08-31 22:22:51,166 INFO L134 LiptonReduction]: Checked pairs total: 1104 [2023-08-31 22:22:51,167 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-08-31 22:22:51,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:22:51,184 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;@715bc513, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:22:51,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-31 22:22:51,185 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:22:51,185 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:22:51,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:51,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:22:51,187 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 22:22:51,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:51,191 INFO L85 PathProgramCache]: Analyzing trace with hash 294, now seen corresponding path program 1 times [2023-08-31 22:22:51,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:51,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733157288] [2023-08-31 22:22:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:51,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:51,293 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 22:22:51,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:51,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733157288] [2023-08-31 22:22:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733157288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:51,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:51,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:22:51,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055333160] [2023-08-31 22:22:51,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:51,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:22:51,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:22:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:22:51,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-08-31 22:22:51,331 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 22:22:51,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:51,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-08-31 22:22:51,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:51,385 INFO L130 PetriNetUnfolder]: 112/179 cut-off events. [2023-08-31 22:22:51,385 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 22:22:51,386 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 22:22:51,388 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2023-08-31 22:22:51,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-08-31 22:22:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:22:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:22:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2023-08-31 22:22:51,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-08-31 22:22:51,401 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2023-08-31 22:22:51,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2023-08-31 22:22:51,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:51,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2023-08-31 22:22:51,406 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 22:22:51,410 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 22:22:51,411 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 22:22:51,412 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 46 flow. Second operand 2 states and 156 transitions. [2023-08-31 22:22:51,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-08-31 22:22:51,421 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 22:22:51,423 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 36 flow [2023-08-31 22:22:51,425 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 22:22:51,431 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:22:51,432 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 36 flow [2023-08-31 22:22:51,432 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 22:22:51,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:51,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:22:51,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:22:51,434 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 22:22:51,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash 286821, now seen corresponding path program 1 times [2023-08-31 22:22:51,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:51,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831292452] [2023-08-31 22:22:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:51,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:51,709 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 22:22:51,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:51,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831292452] [2023-08-31 22:22:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831292452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:51,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:51,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:22:51,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031952419] [2023-08-31 22:22:51,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:51,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:51,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:51,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 144 [2023-08-31 22:22:51,743 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 22:22:51,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:51,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 144 [2023-08-31 22:22:51,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:51,810 INFO L130 PetriNetUnfolder]: 91/146 cut-off events. [2023-08-31 22:22:51,811 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:22:51,812 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 22:22:51,814 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-31 22:22:51,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 88 flow [2023-08-31 22:22:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2023-08-31 22:22:51,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2023-08-31 22:22:51,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2023-08-31 22:22:51,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2023-08-31 22:22:51,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:51,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2023-08-31 22:22:51,829 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 22:22:51,831 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 22:22:51,831 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 22:22:51,831 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 36 flow. Second operand 3 states and 214 transitions. [2023-08-31 22:22:51,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 88 flow [2023-08-31 22:22:51,832 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 22:22:51,833 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 38 flow [2023-08-31 22:22:51,833 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 22:22:51,835 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:22:51,835 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 38 flow [2023-08-31 22:22:51,835 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 22:22:51,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:51,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:22:51,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:22:51,836 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 22:22:51,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash 286820, now seen corresponding path program 1 times [2023-08-31 22:22:51,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:51,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471611963] [2023-08-31 22:22:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:51,902 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 22:22:51,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471611963] [2023-08-31 22:22:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471611963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:51,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:51,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:22:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759165041] [2023-08-31 22:22:51,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:51,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:51,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:51,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:51,940 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 22:22:51,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:51,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:51,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:51,977 INFO L130 PetriNetUnfolder]: 88/140 cut-off events. [2023-08-31 22:22:51,977 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:22:51,978 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 22:22:51,979 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-31 22:22:51,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 88 flow [2023-08-31 22:22:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-08-31 22:22:51,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-08-31 22:22:51,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-08-31 22:22:51,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-08-31 22:22:51,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:51,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-08-31 22:22:51,982 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 22:22:51,983 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 22:22:51,983 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 22:22:51,983 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 38 flow. Second operand 3 states and 204 transitions. [2023-08-31 22:22:51,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 88 flow [2023-08-31 22:22:51,984 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 22:22:51,985 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-31 22:22:51,985 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 22:22:51,986 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -4 predicate places. [2023-08-31 22:22:51,986 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-31 22:22:51,986 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 22:22:51,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:51,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:22:51,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:22:51,987 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 22:22:51,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash -45115990, now seen corresponding path program 1 times [2023-08-31 22:22:51,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:51,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173293457] [2023-08-31 22:22:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:51,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:52,087 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 22:22:52,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:52,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173293457] [2023-08-31 22:22:52,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173293457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:52,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:52,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:22:52,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696031876] [2023-08-31 22:22:52,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:52,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:22:52,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:22:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:22:52,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:22:52,115 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 22:22:52,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:52,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:22:52,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:52,187 INFO L130 PetriNetUnfolder]: 124/197 cut-off events. [2023-08-31 22:22:52,187 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 22:22:52,188 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 22:22:52,189 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 24 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2023-08-31 22:22:52,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 122 flow [2023-08-31 22:22:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:22:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:22:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 277 transitions. [2023-08-31 22:22:52,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809027777777778 [2023-08-31 22:22:52,191 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 277 transitions. [2023-08-31 22:22:52,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 277 transitions. [2023-08-31 22:22:52,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:52,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 277 transitions. [2023-08-31 22:22:52,192 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 22:22:52,193 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 22:22:52,194 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 22:22:52,194 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 4 states and 277 transitions. [2023-08-31 22:22:52,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 122 flow [2023-08-31 22:22:52,195 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 22:22:52,196 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 57 flow [2023-08-31 22:22:52,196 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 22:22:52,196 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2023-08-31 22:22:52,197 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 57 flow [2023-08-31 22:22:52,197 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 22:22:52,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:52,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:52,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:22:52,198 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 22:22:52,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:52,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1398595235, now seen corresponding path program 1 times [2023-08-31 22:22:52,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:52,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248359099] [2023-08-31 22:22:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:52,334 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 22:22:52,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:52,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248359099] [2023-08-31 22:22:52,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248359099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:52,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:52,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:22:52,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81942537] [2023-08-31 22:22:52,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:52,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:22:52,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:52,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:22:52,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:22:52,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2023-08-31 22:22:52,384 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 22:22:52,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:52,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2023-08-31 22:22:52,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:52,434 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-08-31 22:22:52,434 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-08-31 22:22:52,437 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 22:22:52,438 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 14 selfloop transitions, 1 changer transitions 8/23 dead transitions. [2023-08-31 22:22:52,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 120 flow [2023-08-31 22:22:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:22:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:22:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 256 transitions. [2023-08-31 22:22:52,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-31 22:22:52,440 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 256 transitions. [2023-08-31 22:22:52,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 256 transitions. [2023-08-31 22:22:52,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:52,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 256 transitions. [2023-08-31 22:22:52,441 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 22:22:52,442 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 22:22:52,443 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 22:22:52,443 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 57 flow. Second operand 4 states and 256 transitions. [2023-08-31 22:22:52,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 120 flow [2023-08-31 22:22:52,445 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 22:22:52,446 INFO L231 Difference]: Finished difference. Result has 25 places, 15 transitions, 55 flow [2023-08-31 22:22:52,446 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 22:22:52,448 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-31 22:22:52,448 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 55 flow [2023-08-31 22:22:52,448 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 22:22:52,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:52,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:52,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:22:52,449 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 22:22:52,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash -407213147, now seen corresponding path program 1 times [2023-08-31 22:22:52,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:52,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134569440] [2023-08-31 22:22:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:52,581 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 22:22:52,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:52,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134569440] [2023-08-31 22:22:52,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134569440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:52,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:52,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:22:52,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69351252] [2023-08-31 22:22:52,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:52,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:22:52,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:22:52,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:22:52,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:52,607 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 22:22:52,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:52,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:52,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:52,679 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-08-31 22:22:52,679 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-31 22:22:52,680 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 22:22:52,682 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-31 22:22:52,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 217 flow [2023-08-31 22:22:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:22:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:22:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 404 transitions. [2023-08-31 22:22:52,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2023-08-31 22:22:52,685 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 404 transitions. [2023-08-31 22:22:52,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 404 transitions. [2023-08-31 22:22:52,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:52,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 404 transitions. [2023-08-31 22:22:52,687 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 22:22:52,689 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 22:22:52,689 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 22:22:52,690 INFO L175 Difference]: Start difference. First operand has 25 places, 15 transitions, 55 flow. Second operand 6 states and 404 transitions. [2023-08-31 22:22:52,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 217 flow [2023-08-31 22:22:52,691 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 22:22:52,692 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 135 flow [2023-08-31 22:22:52,692 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 22:22:52,695 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2023-08-31 22:22:52,695 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 135 flow [2023-08-31 22:22:52,695 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 22:22:52,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:52,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:52,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:22:52,699 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 22:22:52,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:52,699 INFO L85 PathProgramCache]: Analyzing trace with hash -407195477, now seen corresponding path program 2 times [2023-08-31 22:22:52,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:52,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784289387] [2023-08-31 22:22:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:52,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:52,810 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 22:22:52,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:52,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784289387] [2023-08-31 22:22:52,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784289387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:52,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:52,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:22:52,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683363791] [2023-08-31 22:22:52,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:22:52,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:22:52,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:22:52,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:52,836 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 22:22:52,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:52,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:52,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:52,915 INFO L130 PetriNetUnfolder]: 114/199 cut-off events. [2023-08-31 22:22:52,916 INFO L131 PetriNetUnfolder]: For 277/277 co-relation queries the response was YES. [2023-08-31 22:22:52,916 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 22:22:52,917 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-31 22:22:52,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 285 flow [2023-08-31 22:22:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:22:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:22:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2023-08-31 22:22:52,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2023-08-31 22:22:52,919 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 338 transitions. [2023-08-31 22:22:52,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 338 transitions. [2023-08-31 22:22:52,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:52,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 338 transitions. [2023-08-31 22:22:52,920 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 22:22:52,921 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 22:22:52,922 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 22:22:52,922 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 135 flow. Second operand 5 states and 338 transitions. [2023-08-31 22:22:52,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 285 flow [2023-08-31 22:22:52,926 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 22:22:52,927 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 183 flow [2023-08-31 22:22:52,927 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 22:22:52,928 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 13 predicate places. [2023-08-31 22:22:52,928 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 183 flow [2023-08-31 22:22:52,928 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 22:22:52,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:52,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:52,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:22:52,929 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 22:22:52,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:52,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1802673473, now seen corresponding path program 1 times [2023-08-31 22:22:52,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:52,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744465096] [2023-08-31 22:22:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:52,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:53,036 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 22:22:53,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:53,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744465096] [2023-08-31 22:22:53,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744465096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:53,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:53,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:22:53,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445711245] [2023-08-31 22:22:53,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:53,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:22:53,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:53,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:22:53,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:22:53,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:53,060 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 22:22:53,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:53,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:53,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:53,218 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2023-08-31 22:22:53,219 INFO L131 PetriNetUnfolder]: For 529/529 co-relation queries the response was YES. [2023-08-31 22:22:53,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 219 events. 126/219 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 690 event pairs, 19 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 782. Up to 86 conditions per place. [2023-08-31 22:22:53,220 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 32 selfloop transitions, 16 changer transitions 11/59 dead transitions. [2023-08-31 22:22:53,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 426 flow [2023-08-31 22:22:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:22:53,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:22:53,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 601 transitions. [2023-08-31 22:22:53,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637345679012346 [2023-08-31 22:22:53,223 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 601 transitions. [2023-08-31 22:22:53,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 601 transitions. [2023-08-31 22:22:53,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:53,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 601 transitions. [2023-08-31 22:22:53,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.77777777777777) internal successors, (601), 9 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:53,227 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 22:22:53,227 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 22:22:53,228 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 183 flow. Second operand 9 states and 601 transitions. [2023-08-31 22:22:53,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 426 flow [2023-08-31 22:22:53,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 59 transitions, 389 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-31 22:22:53,231 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 252 flow [2023-08-31 22:22:53,232 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2023-08-31 22:22:53,232 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 20 predicate places. [2023-08-31 22:22:53,232 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 252 flow [2023-08-31 22:22:53,233 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 22:22:53,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:53,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:53,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:22:53,233 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 22:22:53,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:53,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1802518163, now seen corresponding path program 2 times [2023-08-31 22:22:53,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:53,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551753674] [2023-08-31 22:22:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:53,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:53,308 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 22:22:53,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:53,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551753674] [2023-08-31 22:22:53,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551753674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:53,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:53,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:22:53,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821596892] [2023-08-31 22:22:53,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:53,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:22:53,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:53,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:22:53,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:22:53,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:53,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 252 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 22:22:53,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:53,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:53,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:53,434 INFO L130 PetriNetUnfolder]: 162/283 cut-off events. [2023-08-31 22:22:53,434 INFO L131 PetriNetUnfolder]: For 823/823 co-relation queries the response was YES. [2023-08-31 22:22:53,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 283 events. 162/283 cut-off events. For 823/823 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 946 event pairs, 18 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1076. Up to 77 conditions per place. [2023-08-31 22:22:53,436 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 38 selfloop transitions, 20 changer transitions 3/61 dead transitions. [2023-08-31 22:22:53,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 498 flow [2023-08-31 22:22:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 22:22:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 22:22:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-08-31 22:22:53,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-08-31 22:22:53,439 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-08-31 22:22:53,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-08-31 22:22:53,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:53,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-08-31 22:22:53,441 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 22:22:53,442 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 22:22:53,443 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 22:22:53,443 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 252 flow. Second operand 8 states and 534 transitions. [2023-08-31 22:22:53,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 498 flow [2023-08-31 22:22:53,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 468 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-31 22:22:53,448 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 345 flow [2023-08-31 22:22:53,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=345, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-08-31 22:22:53,449 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 29 predicate places. [2023-08-31 22:22:53,449 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 345 flow [2023-08-31 22:22:53,449 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 22:22:53,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:53,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:53,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:22:53,450 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 22:22:53,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash -105307223, now seen corresponding path program 3 times [2023-08-31 22:22:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:53,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457572145] [2023-08-31 22:22:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:53,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:53,560 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 22:22:53,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:53,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457572145] [2023-08-31 22:22:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457572145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:53,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:53,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:22:53,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254511375] [2023-08-31 22:22:53,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:53,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:22:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:53,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:22:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:22:53,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:53,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 345 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 22:22:53,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:53,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:53,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:53,686 INFO L130 PetriNetUnfolder]: 150/263 cut-off events. [2023-08-31 22:22:53,686 INFO L131 PetriNetUnfolder]: For 1219/1219 co-relation queries the response was YES. [2023-08-31 22:22:53,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 263 events. 150/263 cut-off events. For 1219/1219 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 879 event pairs, 22 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 1173. Up to 65 conditions per place. [2023-08-31 22:22:53,689 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 30 selfloop transitions, 20 changer transitions 8/58 dead transitions. [2023-08-31 22:22:53,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 567 flow [2023-08-31 22:22:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:22:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:22:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2023-08-31 22:22:53,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632936507936508 [2023-08-31 22:22:53,691 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 467 transitions. [2023-08-31 22:22:53,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 467 transitions. [2023-08-31 22:22:53,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:53,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 467 transitions. [2023-08-31 22:22:53,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.71428571428571) internal successors, (467), 7 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:53,694 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 22:22:53,695 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 22:22:53,695 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 345 flow. Second operand 7 states and 467 transitions. [2023-08-31 22:22:53,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 567 flow [2023-08-31 22:22:53,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 532 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-31 22:22:53,700 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 389 flow [2023-08-31 22:22:53,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=389, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2023-08-31 22:22:53,701 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 34 predicate places. [2023-08-31 22:22:53,701 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 389 flow [2023-08-31 22:22:53,702 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 22:22:53,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:53,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:53,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:22:53,703 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 22:22:53,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1030467307, now seen corresponding path program 4 times [2023-08-31 22:22:53,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:53,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255748100] [2023-08-31 22:22:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:53,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:53,800 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 22:22:53,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:53,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255748100] [2023-08-31 22:22:53,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255748100] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979569266] [2023-08-31 22:22:53,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:22:53,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:53,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:53,809 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 22:22:53,824 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 22:22:53,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:22:53,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:53,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 22:22:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:53,996 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 22:22:53,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:54,096 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 22:22:54,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979569266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:54,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:54,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 22:22:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447591015] [2023-08-31 22:22:54,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:54,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:22:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:22:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:22:54,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:54,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 389 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 22:22:54,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:54,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:54,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:54,391 INFO L130 PetriNetUnfolder]: 198/343 cut-off events. [2023-08-31 22:22:54,392 INFO L131 PetriNetUnfolder]: For 2134/2134 co-relation queries the response was YES. [2023-08-31 22:22:54,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 343 events. 198/343 cut-off events. For 2134/2134 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1137 event pairs, 18 based on Foata normal form. 16/359 useless extension candidates. Maximal degree in co-relation 1638. Up to 87 conditions per place. [2023-08-31 22:22:54,394 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 34 selfloop transitions, 35 changer transitions 22/91 dead transitions. [2023-08-31 22:22:54,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 947 flow [2023-08-31 22:22:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:22:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:22:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 928 transitions. [2023-08-31 22:22:54,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-08-31 22:22:54,398 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 928 transitions. [2023-08-31 22:22:54,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 928 transitions. [2023-08-31 22:22:54,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:54,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 928 transitions. [2023-08-31 22:22:54,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 66.28571428571429) internal successors, (928), 14 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:54,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 144.0) internal successors, (2160), 15 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:54,404 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 144.0) internal successors, (2160), 15 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:54,404 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 389 flow. Second operand 14 states and 928 transitions. [2023-08-31 22:22:54,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 947 flow [2023-08-31 22:22:54,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 885 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-31 22:22:54,411 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 690 flow [2023-08-31 22:22:54,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=690, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2023-08-31 22:22:54,412 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 47 predicate places. [2023-08-31 22:22:54,412 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 690 flow [2023-08-31 22:22:54,413 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 22:22:54,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:54,413 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:54,421 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 22:22:54,618 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 22:22:54,619 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 22:22:54,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash 771926841, now seen corresponding path program 5 times [2023-08-31 22:22:54,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:54,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964241739] [2023-08-31 22:22:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:54,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:54,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:54,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964241739] [2023-08-31 22:22:54,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964241739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:54,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122899213] [2023-08-31 22:22:54,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:22:54,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:54,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:54,782 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 22:22:54,812 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 22:22:54,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 22:22:54,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:54,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:22:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:54,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:55,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122899213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:55,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:55,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-31 22:22:55,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9573018] [2023-08-31 22:22:55,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:55,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:22:55,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:55,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:22:55,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:22:55,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:55,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 690 flow. Second operand has 16 states, 16 states have (on average 62.75) internal successors, (1004), 16 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:55,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:55,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:55,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:55,465 INFO L130 PetriNetUnfolder]: 254/455 cut-off events. [2023-08-31 22:22:55,465 INFO L131 PetriNetUnfolder]: For 4616/4616 co-relation queries the response was YES. [2023-08-31 22:22:55,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 455 events. 254/455 cut-off events. For 4616/4616 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1587 event pairs, 55 based on Foata normal form. 32/487 useless extension candidates. Maximal degree in co-relation 2410. Up to 249 conditions per place. [2023-08-31 22:22:55,468 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 65 selfloop transitions, 25 changer transitions 27/117 dead transitions. [2023-08-31 22:22:55,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1456 flow [2023-08-31 22:22:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:22:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:22:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1059 transitions. [2023-08-31 22:22:55,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596354166666667 [2023-08-31 22:22:55,471 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1059 transitions. [2023-08-31 22:22:55,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1059 transitions. [2023-08-31 22:22:55,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:55,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1059 transitions. [2023-08-31 22:22:55,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 66.1875) internal successors, (1059), 16 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:55,478 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 22:22:55,478 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 22:22:55,479 INFO L175 Difference]: Start difference. First operand has 71 places, 55 transitions, 690 flow. Second operand 16 states and 1059 transitions. [2023-08-31 22:22:55,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1456 flow [2023-08-31 22:22:55,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 117 transitions, 1095 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-08-31 22:22:55,494 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 763 flow [2023-08-31 22:22:55,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=763, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2023-08-31 22:22:55,495 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 67 predicate places. [2023-08-31 22:22:55,495 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 763 flow [2023-08-31 22:22:55,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.75) internal successors, (1004), 16 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:55,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:55,496 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:55,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:55,701 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 22:22:55,701 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 22:22:55,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:55,702 INFO L85 PathProgramCache]: Analyzing trace with hash -157115917, now seen corresponding path program 6 times [2023-08-31 22:22:55,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:55,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016420280] [2023-08-31 22:22:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:55,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:55,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:55,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016420280] [2023-08-31 22:22:55,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016420280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:55,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729349427] [2023-08-31 22:22:55,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:22:55,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:55,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:55,821 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 22:22:55,849 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 22:22:55,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 22:22:55,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:22:55,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:55,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:56,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729349427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:56,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:56,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 22:22:56,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20668010] [2023-08-31 22:22:56,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:56,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 22:22:56,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 22:22:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-31 22:22:56,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:56,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 763 flow. Second operand has 17 states, 17 states have (on average 62.8235294117647) internal successors, (1068), 17 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:56,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:56,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:56,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:56,620 INFO L130 PetriNetUnfolder]: 408/747 cut-off events. [2023-08-31 22:22:56,620 INFO L131 PetriNetUnfolder]: For 12734/12734 co-relation queries the response was YES. [2023-08-31 22:22:56,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4033 conditions, 747 events. 408/747 cut-off events. For 12734/12734 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3260 event pairs, 44 based on Foata normal form. 32/779 useless extension candidates. Maximal degree in co-relation 3997. Up to 227 conditions per place. [2023-08-31 22:22:56,626 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 73 selfloop transitions, 71 changer transitions 37/181 dead transitions. [2023-08-31 22:22:56,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 2079 flow [2023-08-31 22:22:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 22:22:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 22:22:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1456 transitions. [2023-08-31 22:22:56,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2023-08-31 22:22:56,632 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1456 transitions. [2023-08-31 22:22:56,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1456 transitions. [2023-08-31 22:22:56,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:56,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1456 transitions. [2023-08-31 22:22:56,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.18181818181819) internal successors, (1456), 22 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:56,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 144.0) internal successors, (3312), 23 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:56,643 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 144.0) internal successors, (3312), 23 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:56,643 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 763 flow. Second operand 22 states and 1456 transitions. [2023-08-31 22:22:56,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 2079 flow [2023-08-31 22:22:56,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 181 transitions, 1987 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-08-31 22:22:56,672 INFO L231 Difference]: Finished difference. Result has 122 places, 107 transitions, 1490 flow [2023-08-31 22:22:56,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1490, PETRI_PLACES=122, PETRI_TRANSITIONS=107} [2023-08-31 22:22:56,673 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 98 predicate places. [2023-08-31 22:22:56,673 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 107 transitions, 1490 flow [2023-08-31 22:22:56,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 62.8235294117647) internal successors, (1068), 17 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:56,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:56,674 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:56,683 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 22:22:56,879 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 22:22:56,879 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 22:22:56,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:56,880 INFO L85 PathProgramCache]: Analyzing trace with hash 384037113, now seen corresponding path program 7 times [2023-08-31 22:22:56,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:56,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8433194] [2023-08-31 22:22:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:56,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:56,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8433194] [2023-08-31 22:22:56,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8433194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865146194] [2023-08-31 22:22:56,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 22:22:56,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:56,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:56,999 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 22:22:57,022 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 22:22:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:22:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:57,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:57,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865146194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:57,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:57,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 22:22:57,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876948704] [2023-08-31 22:22:57,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:57,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 22:22:57,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:57,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 22:22:57,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-08-31 22:22:57,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:57,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 107 transitions, 1490 flow. Second operand has 17 states, 17 states have (on average 62.76470588235294) internal successors, (1067), 17 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:57,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:57,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:57,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:58,003 INFO L130 PetriNetUnfolder]: 572/1027 cut-off events. [2023-08-31 22:22:58,003 INFO L131 PetriNetUnfolder]: For 34527/34527 co-relation queries the response was YES. [2023-08-31 22:22:58,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7292 conditions, 1027 events. 572/1027 cut-off events. For 34527/34527 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4755 event pairs, 20 based on Foata normal form. 32/1059 useless extension candidates. Maximal degree in co-relation 7241. Up to 327 conditions per place. [2023-08-31 22:22:58,012 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 61 selfloop transitions, 127 changer transitions 48/236 dead transitions. [2023-08-31 22:22:58,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 236 transitions, 3638 flow [2023-08-31 22:22:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 22:22:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 22:22:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1787 transitions. [2023-08-31 22:22:58,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45961934156378603 [2023-08-31 22:22:58,020 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1787 transitions. [2023-08-31 22:22:58,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1787 transitions. [2023-08-31 22:22:58,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:58,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1787 transitions. [2023-08-31 22:22:58,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 66.18518518518519) internal successors, (1787), 27 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:58,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:58,030 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:58,031 INFO L175 Difference]: Start difference. First operand has 122 places, 107 transitions, 1490 flow. Second operand 27 states and 1787 transitions. [2023-08-31 22:22:58,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 236 transitions, 3638 flow [2023-08-31 22:22:58,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 236 transitions, 3314 flow, removed 148 selfloop flow, removed 7 redundant places. [2023-08-31 22:22:58,109 INFO L231 Difference]: Finished difference. Result has 156 places, 149 transitions, 2481 flow [2023-08-31 22:22:58,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2481, PETRI_PLACES=156, PETRI_TRANSITIONS=149} [2023-08-31 22:22:58,110 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 132 predicate places. [2023-08-31 22:22:58,110 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 149 transitions, 2481 flow [2023-08-31 22:22:58,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 62.76470588235294) internal successors, (1067), 17 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:58,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:58,111 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:58,119 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 22:22:58,316 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 22:22:58,317 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 22:22:58,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:58,317 INFO L85 PathProgramCache]: Analyzing trace with hash 107817203, now seen corresponding path program 8 times [2023-08-31 22:22:58,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:58,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016033070] [2023-08-31 22:22:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:58,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:58,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016033070] [2023-08-31 22:22:58,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016033070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:58,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777528816] [2023-08-31 22:22:58,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:22:58,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:58,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:58,462 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 22:22:58,464 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 22:22:58,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:22:58,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:58,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 22:22:58,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:58,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777528816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:58,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:58,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-08-31 22:22:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252643355] [2023-08-31 22:22:58,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:58,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:22:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:22:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:22:58,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2023-08-31 22:22:58,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 149 transitions, 2481 flow. Second operand has 15 states, 15 states have (on average 62.333333333333336) internal successors, (935), 15 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:58,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:58,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2023-08-31 22:22:58,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:59,274 INFO L130 PetriNetUnfolder]: 624/1115 cut-off events. [2023-08-31 22:22:59,274 INFO L131 PetriNetUnfolder]: For 50063/50063 co-relation queries the response was YES. [2023-08-31 22:22:59,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9637 conditions, 1115 events. 624/1115 cut-off events. For 50063/50063 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5139 event pairs, 40 based on Foata normal form. 4/1119 useless extension candidates. Maximal degree in co-relation 9571. Up to 350 conditions per place. [2023-08-31 22:22:59,285 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 65 selfloop transitions, 123 changer transitions 34/222 dead transitions. [2023-08-31 22:22:59,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 222 transitions, 4243 flow [2023-08-31 22:22:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 22:22:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 22:22:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1318 transitions. [2023-08-31 22:22:59,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576388888888889 [2023-08-31 22:22:59,289 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1318 transitions. [2023-08-31 22:22:59,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1318 transitions. [2023-08-31 22:22:59,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:59,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1318 transitions. [2023-08-31 22:22:59,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.9) internal successors, (1318), 20 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:59,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 144.0) internal successors, (3024), 21 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:59,298 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 144.0) internal successors, (3024), 21 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:59,298 INFO L175 Difference]: Start difference. First operand has 156 places, 149 transitions, 2481 flow. Second operand 20 states and 1318 transitions. [2023-08-31 22:22:59,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 222 transitions, 4243 flow [2023-08-31 22:22:59,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 222 transitions, 3259 flow, removed 469 selfloop flow, removed 10 redundant places. [2023-08-31 22:22:59,414 INFO L231 Difference]: Finished difference. Result has 173 places, 165 transitions, 2517 flow [2023-08-31 22:22:59,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2517, PETRI_PLACES=173, PETRI_TRANSITIONS=165} [2023-08-31 22:22:59,415 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 149 predicate places. [2023-08-31 22:22:59,415 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 165 transitions, 2517 flow [2023-08-31 22:22:59,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.333333333333336) internal successors, (935), 15 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:59,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:59,416 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:59,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:59,618 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 22:22:59,618 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 22:22:59,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1904189627, now seen corresponding path program 9 times [2023-08-31 22:22:59,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:59,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943075063] [2023-08-31 22:22:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:59,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:22:59,648 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:22:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:22:59,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:22:59,685 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:22:59,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (7 of 8 remaining) [2023-08-31 22:22:59,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-31 22:22:59,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-31 22:22:59,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-31 22:22:59,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-08-31 22:22:59,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-31 22:22:59,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 8 remaining) [2023-08-31 22:22:59,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 8 remaining) [2023-08-31 22:22:59,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:22:59,691 INFO L445 BasicCegarLoop]: Path program histogram: [9, 2, 1, 1, 1, 1, 1] [2023-08-31 22:22:59,695 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:22:59,696 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:22:59,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:22:59 BasicIcfg [2023-08-31 22:22:59,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:22:59,744 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:22:59,744 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:22:59,744 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:22:59,745 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:22:48" (3/4) ... [2023-08-31 22:22:59,747 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:22:59,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:22:59,747 INFO L158 Benchmark]: Toolchain (without parser) took 11950.57ms. Allocated memory was 67.1MB in the beginning and 201.3MB in the end (delta: 134.2MB). Free memory was 43.6MB in the beginning and 98.2MB in the end (delta: -54.6MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. [2023-08-31 22:22:59,748 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory is still 32.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:22:59,748 INFO L158 Benchmark]: CACSL2BoogieTranslator took 433.55ms. Allocated memory is still 67.1MB. Free memory was 43.4MB in the beginning and 39.1MB in the end (delta: 4.3MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2023-08-31 22:22:59,748 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.02ms. Allocated memory is still 67.1MB. Free memory was 39.1MB in the beginning and 37.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:22:59,748 INFO L158 Benchmark]: Boogie Preprocessor took 47.52ms. Allocated memory is still 67.1MB. Free memory was 37.1MB in the beginning and 35.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:22:59,749 INFO L158 Benchmark]: RCFGBuilder took 371.28ms. Allocated memory is still 67.1MB. Free memory was 35.7MB in the beginning and 40.7MB in the end (delta: -5.0MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2023-08-31 22:22:59,749 INFO L158 Benchmark]: TraceAbstraction took 11031.08ms. Allocated memory was 67.1MB in the beginning and 201.3MB in the end (delta: 134.2MB). Free memory was 40.2MB in the beginning and 98.2MB in the end (delta: -58.0MB). Peak memory consumption was 77.2MB. Max. memory is 16.1GB. [2023-08-31 22:22:59,749 INFO L158 Benchmark]: Witness Printer took 3.03ms. Allocated memory is still 201.3MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:22:59,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory is still 32.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 433.55ms. Allocated memory is still 67.1MB. Free memory was 43.4MB in the beginning and 39.1MB in the end (delta: 4.3MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.02ms. Allocated memory is still 67.1MB. Free memory was 39.1MB in the beginning and 37.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.52ms. Allocated memory is still 67.1MB. Free memory was 37.1MB in the beginning and 35.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 371.28ms. Allocated memory is still 67.1MB. Free memory was 35.7MB in the beginning and 40.7MB in the end (delta: -5.0MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * TraceAbstraction took 11031.08ms. Allocated memory was 67.1MB in the beginning and 201.3MB in the end (delta: 134.2MB). Free memory was 40.2MB in the beginning and 98.2MB in the end (delta: -58.0MB). Peak memory consumption was 77.2MB. Max. memory is 16.1GB. * Witness Printer took 3.03ms. Allocated memory is still 201.3MB. Free memory is still 98.2MB. 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: 2.3s, 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] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [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=7, id1={3:0}, id2={5:0}, j=6, k=1, 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=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*5 +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 < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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] [L719] 0 int condJ = j >= (2*5 +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=15, id1={3:0}, id2={5:0}, j=16, k=5, k=5] - 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: 10.9s, OverallIterations: 16, TraceHistogramMax: 5, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1452 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1308 mSDsluCounter, 291 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 266 mSDsCounter, 187 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2021 IncrementalHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 187 mSolverCounterUnsat, 25 mSDtfsCounter, 2021 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2517occurred in iteration=15, InterpolantAutomatonStates: 150, 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, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 224 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 251 ConstructedInterpolants, 0 QuantifiedInterpolants, 1135 SizeOfPredicates, 27 NumberOfNonLiveVariables, 725 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 25 InterpolantComputations, 10 PerfectInterpolantSequences, 9/114 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 22:22:59,768 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-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 9ca4ad6de5ce46f9737c47ccc55c2628eaef135acf1b94c234f6d96d13f1ccb1 --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 22:23:01,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:23:01,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:23:01,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:23:01,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:23:01,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:23:01,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:23:01,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:23:01,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:23:01,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:23:01,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:23:01,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:23:01,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:23:01,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:23:01,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:23:01,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:23:01,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:23:01,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:23:01,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:23:01,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:23:01,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:23:01,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:23:01,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:23:01,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:23:01,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:23:01,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:23:01,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:23:01,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:23:01,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:23:01,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:23:01,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:23:01,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:23:01,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:23:01,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:23:01,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:23:01,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:23:01,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:23:01,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:23:01,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:23:01,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:23:01,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:23:01,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-31 22:23:01,726 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:23:01,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:23:01,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:23:01,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:23:01,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:23:01,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:23:01,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:23:01,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:23:01,731 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:23:01,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:23:01,732 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:23:01,732 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:23:01,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:23:01,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:23:01,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:23:01,733 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:23:01,733 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:23:01,733 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:23:01,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:23:01,733 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:23:01,733 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-31 22:23:01,734 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-31 22:23:01,734 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:23:01,734 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:23:01,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:23:01,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:23:01,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:23:01,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:23:01,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:23:01,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:23:01,735 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-31 22:23:01,736 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-31 22:23:01,736 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:23:01,736 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:23:01,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:23:01,736 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-31 22:23:01,737 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:23:01,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ca4ad6de5ce46f9737c47ccc55c2628eaef135acf1b94c234f6d96d13f1ccb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:23:02,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:23:02,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:23:02,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:23:02,107 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:23:02,108 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:23:02,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2023-08-31 22:23:03,356 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:23:03,609 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:23:03,609 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2023-08-31 22:23:03,620 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcd5bc67b/cacb1951f1bc4d8089133e66548cdc5b/FLAGbebce51ff [2023-08-31 22:23:03,632 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcd5bc67b/cacb1951f1bc4d8089133e66548cdc5b [2023-08-31 22:23:03,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:23:03,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:23:03,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:23:03,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:23:03,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:23:03,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:23:03" (1/1) ... [2023-08-31 22:23:03,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47c55dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:03, skipping insertion in model container [2023-08-31 22:23:03,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:23:03" (1/1) ... [2023-08-31 22:23:03,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:23:03,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:23:03,960 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-2.i[30952,30965] [2023-08-31 22:23:03,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:23:03,977 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:23:04,039 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-2.i[30952,30965] [2023-08-31 22:23:04,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:23:04,091 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:23:04,091 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:23:04,097 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:23:04,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:23:04 WrapperNode [2023-08-31 22:23:04,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:23:04,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:23:04,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:23:04,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:23:04,105 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 22:23:04,138 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 22:23:04,158 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2023-08-31 22:23:04,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:23:04,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:23:04,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:23:04,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:23:04,167 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 22:23:04,167 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 22:23:04,178 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 22:23:04,178 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 22:23:04,189 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 22:23:04,197 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 22:23:04,199 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 22:23:04,204 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 22:23:04,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:23:04,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:23:04,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:23:04,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:23:04,208 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 22:23:04,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:23:04,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:04,250 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 22:23:04,274 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 22:23:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:23:04,283 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:23:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:23:04,284 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:23:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 22:23:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:23:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:23:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:23:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-31 22:23:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-31 22:23:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 22:23:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:23:04,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:23:04,287 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 22:23:04,465 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:23:04,466 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:23:04,719 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:23:04,724 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:23:04,726 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:23:04,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:04 BoogieIcfgContainer [2023-08-31 22:23:04,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:23:04,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:23:04,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:23:04,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:23:04,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:23:03" (1/3) ... [2023-08-31 22:23:04,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3482639f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:23:04, skipping insertion in model container [2023-08-31 22:23:04,734 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 22:23:04,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3482639f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:23:04, skipping insertion in model container [2023-08-31 22:23:04,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:04" (3/3) ... [2023-08-31 22:23:04,736 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2023-08-31 22:23:04,768 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:23:04,768 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-31 22:23:04,768 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:23:04,845 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:23:04,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 75 transitions, 160 flow [2023-08-31 22:23:04,926 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-08-31 22:23:04,926 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:04,931 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 22:23:04,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 75 transitions, 160 flow [2023-08-31 22:23:04,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 73 transitions, 152 flow [2023-08-31 22:23:04,942 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:23:04,961 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 73 transitions, 152 flow [2023-08-31 22:23:04,970 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 73 transitions, 152 flow [2023-08-31 22:23:04,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 152 flow [2023-08-31 22:23:04,997 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-08-31 22:23:04,997 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:04,999 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 22:23:05,000 INFO L119 LiptonReduction]: Number of co-enabled transitions 1254 [2023-08-31 22:23:08,897 INFO L134 LiptonReduction]: Checked pairs total: 1134 [2023-08-31 22:23:08,897 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-31 22:23:08,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:23:08,916 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;@18e96cad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:23:08,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-31 22:23:08,917 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:23:08,918 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:08,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:08,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:23:08,919 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 22:23:08,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash 295, now seen corresponding path program 1 times [2023-08-31 22:23:08,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:08,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170073607] [2023-08-31 22:23:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:08,935 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 22:23:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:08,941 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 22:23:08,952 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 22:23:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:08,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-31 22:23:09,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:09,005 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 22:23:09,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:09,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:09,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170073607] [2023-08-31 22:23:09,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170073607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:09,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:09,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:23:09,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873500149] [2023-08-31 22:23:09,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:09,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:23:09,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:09,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:23:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:23:09,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2023-08-31 22:23:09,041 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 22:23:09,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:09,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2023-08-31 22:23:09,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:09,138 INFO L130 PetriNetUnfolder]: 112/179 cut-off events. [2023-08-31 22:23:09,144 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:23:09,145 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 22:23:09,148 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2023-08-31 22:23:09,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-08-31 22:23:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:23:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:23:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2023-08-31 22:23:09,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2023-08-31 22:23:09,179 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2023-08-31 22:23:09,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2023-08-31 22:23:09,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:09,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2023-08-31 22:23:09,190 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 22:23:09,194 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 22:23:09,195 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 22:23:09,196 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 46 flow. Second operand 2 states and 158 transitions. [2023-08-31 22:23:09,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-08-31 22:23:09,205 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 22:23:09,206 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 36 flow [2023-08-31 22:23:09,207 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 22:23:09,210 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:23:09,210 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 36 flow [2023-08-31 22:23:09,210 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 22:23:09,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:09,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:23:09,236 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 22:23:09,411 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 22:23:09,412 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 22:23:09,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash 288861, now seen corresponding path program 1 times [2023-08-31 22:23:09,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:09,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321704008] [2023-08-31 22:23:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:09,413 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 22:23:09,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:09,415 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 22:23:09,418 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 22:23:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:09,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:23:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:09,545 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-31 22:23:09,546 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 22:23:09,561 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 22:23:09,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:09,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321704008] [2023-08-31 22:23:09,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321704008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:09,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:09,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:23:09,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907246717] [2023-08-31 22:23:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:09,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:23:09,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:09,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:23:09,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:23:09,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:09,625 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 22:23:09,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:09,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:09,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:09,714 INFO L130 PetriNetUnfolder]: 91/146 cut-off events. [2023-08-31 22:23:09,714 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:23:09,714 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 22:23:09,715 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-31 22:23:09,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 88 flow [2023-08-31 22:23:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:23:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:23:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-31 22:23:09,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-31 22:23:09,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-31 22:23:09,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-31 22:23:09,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:09,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-31 22:23:09,728 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 22:23:09,730 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 22:23:09,732 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 22:23:09,732 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 36 flow. Second operand 3 states and 208 transitions. [2023-08-31 22:23:09,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 88 flow [2023-08-31 22:23:09,732 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 22:23:09,734 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 38 flow [2023-08-31 22:23:09,734 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 22:23:09,735 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-08-31 22:23:09,735 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 38 flow [2023-08-31 22:23:09,735 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 22:23:09,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:09,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:23:09,742 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 22:23:09,936 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 22:23:09,936 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 22:23:09,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:09,937 INFO L85 PathProgramCache]: Analyzing trace with hash 288862, now seen corresponding path program 1 times [2023-08-31 22:23:09,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:09,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370911531] [2023-08-31 22:23:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:09,938 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 22:23:09,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:09,939 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 22:23:09,947 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 22:23:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:09,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:23:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:10,020 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:23:10,022 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 22:23:10,042 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 22:23:10,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:10,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:10,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370911531] [2023-08-31 22:23:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370911531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:10,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:10,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:23:10,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971399077] [2023-08-31 22:23:10,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:10,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:23:10,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:10,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:23:10,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:23:10,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 144 [2023-08-31 22:23:10,092 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 22:23:10,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:10,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 144 [2023-08-31 22:23:10,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:10,148 INFO L130 PetriNetUnfolder]: 88/140 cut-off events. [2023-08-31 22:23:10,148 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:23:10,149 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 22:23:10,150 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-31 22:23:10,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 88 flow [2023-08-31 22:23:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:23:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:23:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-08-31 22:23:10,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-31 22:23:10,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-08-31 22:23:10,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-08-31 22:23:10,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:10,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-08-31 22:23:10,154 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 22:23:10,155 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 22:23:10,156 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 22:23:10,156 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 38 flow. Second operand 3 states and 216 transitions. [2023-08-31 22:23:10,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 88 flow [2023-08-31 22:23:10,156 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 22:23:10,157 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-31 22:23:10,157 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 22:23:10,158 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -4 predicate places. [2023-08-31 22:23:10,158 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-31 22:23:10,158 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 22:23:10,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:10,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:23:10,170 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 22:23:10,370 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 22:23:10,371 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 22:23:10,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash 15687470, now seen corresponding path program 1 times [2023-08-31 22:23:10,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:10,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461046085] [2023-08-31 22:23:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:10,372 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 22:23:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:10,374 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 22:23:10,377 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 22:23:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:10,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:23:10,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:10,474 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 22:23:10,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:10,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:10,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461046085] [2023-08-31 22:23:10,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461046085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:10,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:10,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:23:10,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466258593] [2023-08-31 22:23:10,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:10,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:23:10,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:23:10,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:23:10,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 144 [2023-08-31 22:23:10,510 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 22:23:10,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:10,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 144 [2023-08-31 22:23:10,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:10,631 INFO L130 PetriNetUnfolder]: 176/281 cut-off events. [2023-08-31 22:23:10,631 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-31 22:23:10,634 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 22:23:10,637 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 31 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2023-08-31 22:23:10,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 166 flow [2023-08-31 22:23:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:23:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:23:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 355 transitions. [2023-08-31 22:23:10,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2023-08-31 22:23:10,640 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 355 transitions. [2023-08-31 22:23:10,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 355 transitions. [2023-08-31 22:23:10,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:10,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 355 transitions. [2023-08-31 22:23:10,641 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 22:23:10,644 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 22:23:10,645 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 22:23:10,645 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 5 states and 355 transitions. [2023-08-31 22:23:10,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 166 flow [2023-08-31 22:23:10,648 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 22:23:10,649 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 79 flow [2023-08-31 22:23:10,649 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 22:23:10,650 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-31 22:23:10,651 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 79 flow [2023-08-31 22:23:10,651 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 22:23:10,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:10,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:10,662 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 22:23:10,860 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 22:23:10,860 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 22:23:10,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash 486312123, now seen corresponding path program 1 times [2023-08-31 22:23:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596561712] [2023-08-31 22:23:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:10,861 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 22:23:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:10,862 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 22:23:10,865 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 22:23:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:10,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:23:10,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:11,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:11,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:11,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596561712] [2023-08-31 22:23:11,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596561712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:11,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:11,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:23:11,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039460391] [2023-08-31 22:23:11,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:11,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:23:11,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:23:11,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:23:11,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 144 [2023-08-31 22:23:11,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:11,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:11,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 144 [2023-08-31 22:23:11,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:11,406 INFO L130 PetriNetUnfolder]: 130/212 cut-off events. [2023-08-31 22:23:11,406 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2023-08-31 22:23:11,407 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 22:23:11,407 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 17 selfloop transitions, 1 changer transitions 10/28 dead transitions. [2023-08-31 22:23:11,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 167 flow [2023-08-31 22:23:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:23:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:23:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 236 transitions. [2023-08-31 22:23:11,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2023-08-31 22:23:11,409 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 236 transitions. [2023-08-31 22:23:11,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 236 transitions. [2023-08-31 22:23:11,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:11,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 236 transitions. [2023-08-31 22:23:11,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:11,411 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 22:23:11,412 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 22:23:11,412 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 79 flow. Second operand 4 states and 236 transitions. [2023-08-31 22:23:11,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 167 flow [2023-08-31 22:23:11,413 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 22:23:11,414 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 77 flow [2023-08-31 22:23:11,414 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 22:23:11,415 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-08-31 22:23:11,415 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 77 flow [2023-08-31 22:23:11,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:11,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:11,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:11,424 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 (6)] Ended with exit code 0 [2023-08-31 22:23:11,624 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 22:23:11,625 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 22:23:11,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2080325179, now seen corresponding path program 1 times [2023-08-31 22:23:11,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:11,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567771557] [2023-08-31 22:23:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:11,626 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 22:23:11,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:11,627 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 22:23:11,629 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 22:23:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:11,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:23:11,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:11,724 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 22:23:11,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:11,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:11,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567771557] [2023-08-31 22:23:11,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567771557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:11,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:11,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:11,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360131818] [2023-08-31 22:23:11,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:11,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:11,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:11,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:11,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:11,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:11,752 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 22:23:11,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:11,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:11,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:11,859 INFO L130 PetriNetUnfolder]: 92/157 cut-off events. [2023-08-31 22:23:11,859 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-31 22:23:11,859 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 22:23:11,860 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 22 selfloop transitions, 9 changer transitions 3/34 dead transitions. [2023-08-31 22:23:11,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 193 flow [2023-08-31 22:23:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:23:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:23:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2023-08-31 22:23:11,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-08-31 22:23:11,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2023-08-31 22:23:11,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2023-08-31 22:23:11,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:11,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2023-08-31 22:23:11,868 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 22:23:11,869 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 22:23:11,870 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 22:23:11,870 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 77 flow. Second operand 5 states and 342 transitions. [2023-08-31 22:23:11,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 193 flow [2023-08-31 22:23:11,871 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 22:23:11,872 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 119 flow [2023-08-31 22:23:11,872 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 22:23:11,873 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2023-08-31 22:23:11,873 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 119 flow [2023-08-31 22:23:11,873 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 22:23:11,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:11,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:11,887 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 22:23:12,082 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 22:23:12,082 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 22:23:12,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:12,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2104567520, now seen corresponding path program 1 times [2023-08-31 22:23:12,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:12,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724736763] [2023-08-31 22:23:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:12,083 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 22:23:12,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:12,085 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 22:23:12,086 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 22:23:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:12,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:23:12,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:12,191 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 22:23:12,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:12,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724736763] [2023-08-31 22:23:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724736763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:12,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:12,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:12,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508421044] [2023-08-31 22:23:12,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:12,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:12,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:12,226 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 22:23:12,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:12,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:12,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:12,335 INFO L130 PetriNetUnfolder]: 132/229 cut-off events. [2023-08-31 22:23:12,335 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2023-08-31 22:23:12,336 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 22:23:12,337 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 34 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2023-08-31 22:23:12,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 301 flow [2023-08-31 22:23:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:23:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:23:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 410 transitions. [2023-08-31 22:23:12,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2023-08-31 22:23:12,339 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 410 transitions. [2023-08-31 22:23:12,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 410 transitions. [2023-08-31 22:23:12,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:12,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 410 transitions. [2023-08-31 22:23:12,341 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 22:23:12,342 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 22:23:12,343 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 22:23:12,343 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 119 flow. Second operand 6 states and 410 transitions. [2023-08-31 22:23:12,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 301 flow [2023-08-31 22:23:12,345 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 22:23:12,346 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 200 flow [2023-08-31 22:23:12,346 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 22:23:12,347 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2023-08-31 22:23:12,347 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 200 flow [2023-08-31 22:23:12,347 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 22:23:12,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:12,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:12,359 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 (8)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:12,557 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 22:23:12,557 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 22:23:12,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:12,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2104543340, now seen corresponding path program 2 times [2023-08-31 22:23:12,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:12,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986217633] [2023-08-31 22:23:12,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:12,558 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 22:23:12,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:12,560 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 22:23:12,562 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 22:23:12,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 22:23:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:23:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:12,657 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 22:23:12,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:12,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:12,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986217633] [2023-08-31 22:23:12,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986217633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:12,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:12,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:23:12,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250588509] [2023-08-31 22:23:12,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:12,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:23:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:23:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:12,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:12,682 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 22:23:12,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:12,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:12,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:12,805 INFO L130 PetriNetUnfolder]: 124/219 cut-off events. [2023-08-31 22:23:12,805 INFO L131 PetriNetUnfolder]: For 496/496 co-relation queries the response was YES. [2023-08-31 22:23:12,806 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 22:23:12,807 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 30 selfloop transitions, 12 changer transitions 6/48 dead transitions. [2023-08-31 22:23:12,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 381 flow [2023-08-31 22:23:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:23:12,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:23:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 409 transitions. [2023-08-31 22:23:12,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47337962962962965 [2023-08-31 22:23:12,809 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 409 transitions. [2023-08-31 22:23:12,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 409 transitions. [2023-08-31 22:23:12,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:12,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 409 transitions. [2023-08-31 22:23:12,810 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 22:23:12,812 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 22:23:12,812 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 22:23:12,812 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 200 flow. Second operand 6 states and 409 transitions. [2023-08-31 22:23:12,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 381 flow [2023-08-31 22:23:12,815 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 22:23:12,816 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 242 flow [2023-08-31 22:23:12,816 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 22:23:12,817 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 21 predicate places. [2023-08-31 22:23:12,817 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 242 flow [2023-08-31 22:23:12,817 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 22:23:12,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:12,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:12,831 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 22:23:13,026 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 22:23:13,027 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 22:23:13,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2065235665, now seen corresponding path program 1 times [2023-08-31 22:23:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:13,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800541372] [2023-08-31 22:23:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:13,028 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 22:23:13,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:13,029 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 22:23:13,032 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 22:23:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:13,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:23:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:13,135 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 22:23:13,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:13,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:13,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800541372] [2023-08-31 22:23:13,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800541372] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:13,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:13,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:13,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171721799] [2023-08-31 22:23:13,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:13,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:13,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:13,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:13,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:13,167 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 22:23:13,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:13,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:13,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:13,335 INFO L130 PetriNetUnfolder]: 172/303 cut-off events. [2023-08-31 22:23:13,336 INFO L131 PetriNetUnfolder]: For 1057/1057 co-relation queries the response was YES. [2023-08-31 22:23:13,337 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 22:23:13,338 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 43 selfloop transitions, 15 changer transitions 5/63 dead transitions. [2023-08-31 22:23:13,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 536 flow [2023-08-31 22:23:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:23:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:23:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 610 transitions. [2023-08-31 22:23:13,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470679012345679 [2023-08-31 22:23:13,341 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 610 transitions. [2023-08-31 22:23:13,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 610 transitions. [2023-08-31 22:23:13,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:13,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 610 transitions. [2023-08-31 22:23:13,343 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 22:23:13,345 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 22:23:13,345 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 22:23:13,345 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 242 flow. Second operand 9 states and 610 transitions. [2023-08-31 22:23:13,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 536 flow [2023-08-31 22:23:13,349 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 22:23:13,350 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 330 flow [2023-08-31 22:23:13,350 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 22:23:13,351 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 31 predicate places. [2023-08-31 22:23:13,351 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 330 flow [2023-08-31 22:23:13,351 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 22:23:13,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:13,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:13,360 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 22:23:13,560 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 22:23:13,561 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 22:23:13,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:13,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2065211485, now seen corresponding path program 2 times [2023-08-31 22:23:13,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:13,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810006882] [2023-08-31 22:23:13,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:13,562 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 22:23:13,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:13,563 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 22:23:13,564 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 22:23:13,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 22:23:13,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:23:13,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:13,679 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 22:23:13,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:13,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:13,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810006882] [2023-08-31 22:23:13,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810006882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:13,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:13,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45158974] [2023-08-31 22:23:13,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:13,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:13,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:13,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:13,706 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 22:23:13,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:13,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:13,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:13,848 INFO L130 PetriNetUnfolder]: 168/299 cut-off events. [2023-08-31 22:23:13,849 INFO L131 PetriNetUnfolder]: For 1657/1657 co-relation queries the response was YES. [2023-08-31 22:23:13,851 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 22:23:13,853 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 38 selfloop transitions, 15 changer transitions 6/59 dead transitions. [2023-08-31 22:23:13,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 59 transitions, 593 flow [2023-08-31 22:23:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:23:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:23:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2023-08-31 22:23:13,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-08-31 22:23:13,855 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2023-08-31 22:23:13,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2023-08-31 22:23:13,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:13,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2023-08-31 22:23:13,858 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 22:23:13,860 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 22:23:13,860 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 22:23:13,861 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 330 flow. Second operand 7 states and 476 transitions. [2023-08-31 22:23:13,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 59 transitions, 593 flow [2023-08-31 22:23:13,867 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 22:23:13,869 INFO L231 Difference]: Finished difference. Result has 59 places, 40 transitions, 343 flow [2023-08-31 22:23:13,870 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 22:23:13,871 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 35 predicate places. [2023-08-31 22:23:13,871 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 40 transitions, 343 flow [2023-08-31 22:23:13,872 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 22:23:13,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:13,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:13,889 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 22:23:14,081 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 22:23:14,081 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 22:23:14,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2065927585, now seen corresponding path program 3 times [2023-08-31 22:23:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725570567] [2023-08-31 22:23:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:23:14,083 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 22:23:14,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:14,084 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 22:23:14,086 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 22:23:14,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 22:23:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:14,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:14,218 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 22:23:14,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:14,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:14,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725570567] [2023-08-31 22:23:14,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725570567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:14,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:14,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:14,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404942503] [2023-08-31 22:23:14,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:14,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:14,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:14,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:14,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:14,249 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 22:23:14,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:14,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:14,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:14,414 INFO L130 PetriNetUnfolder]: 164/295 cut-off events. [2023-08-31 22:23:14,415 INFO L131 PetriNetUnfolder]: For 1808/1808 co-relation queries the response was YES. [2023-08-31 22:23:14,416 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 22:23:14,417 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 44 selfloop transitions, 9 changer transitions 9/62 dead transitions. [2023-08-31 22:23:14,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 571 flow [2023-08-31 22:23:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:23:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:23:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2023-08-31 22:23:14,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-08-31 22:23:14,420 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2023-08-31 22:23:14,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2023-08-31 22:23:14,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:14,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2023-08-31 22:23:14,421 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 22:23:14,423 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 22:23:14,423 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 22:23:14,423 INFO L175 Difference]: Start difference. First operand has 59 places, 40 transitions, 343 flow. Second operand 7 states and 476 transitions. [2023-08-31 22:23:14,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 571 flow [2023-08-31 22:23:14,430 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 22:23:14,431 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 367 flow [2023-08-31 22:23:14,431 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 22:23:14,432 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 40 predicate places. [2023-08-31 22:23:14,432 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 367 flow [2023-08-31 22:23:14,432 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 22:23:14,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:14,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:14,442 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 22:23:14,641 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 22:23:14,642 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 22:23:14,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2065153825, now seen corresponding path program 4 times [2023-08-31 22:23:14,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:14,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845945900] [2023-08-31 22:23:14,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:23:14,643 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 22:23:14,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:14,643 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 22:23:14,644 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 22:23:14,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:23:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:23:14,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:14,751 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 22:23:14,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:14,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845945900] [2023-08-31 22:23:14,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845945900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:14,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:23:14,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:23:14,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483046563] [2023-08-31 22:23:14,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:14,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:23:14,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:23:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:23:14,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:14,775 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 22:23:14,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:14,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:14,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:14,929 INFO L130 PetriNetUnfolder]: 176/315 cut-off events. [2023-08-31 22:23:14,930 INFO L131 PetriNetUnfolder]: For 2117/2117 co-relation queries the response was YES. [2023-08-31 22:23:14,931 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 22:23:14,932 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 41 selfloop transitions, 16 changer transitions 8/65 dead transitions. [2023-08-31 22:23:14,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 643 flow [2023-08-31 22:23:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:23:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:23:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 475 transitions. [2023-08-31 22:23:14,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4712301587301587 [2023-08-31 22:23:14,935 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 475 transitions. [2023-08-31 22:23:14,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 475 transitions. [2023-08-31 22:23:14,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:14,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 475 transitions. [2023-08-31 22:23:14,936 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 22:23:14,938 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 22:23:14,939 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 22:23:14,939 INFO L175 Difference]: Start difference. First operand has 64 places, 42 transitions, 367 flow. Second operand 7 states and 475 transitions. [2023-08-31 22:23:14,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 643 flow [2023-08-31 22:23:14,951 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 22:23:14,953 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 438 flow [2023-08-31 22:23:14,953 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 22:23:14,955 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 44 predicate places. [2023-08-31 22:23:14,955 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 438 flow [2023-08-31 22:23:14,955 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 22:23:14,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:14,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:14,967 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 22:23:15,164 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 22:23:15,164 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 22:23:15,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash 402976459, now seen corresponding path program 5 times [2023-08-31 22:23:15,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:15,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549127344] [2023-08-31 22:23:15,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:23:15,165 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 22:23:15,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:15,166 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 22:23:15,167 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 22:23:15,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:15,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:15,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:15,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:15,279 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 22:23:15,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:15,438 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 22:23:15,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:15,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549127344] [2023-08-31 22:23:15,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549127344] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:15,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:15,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:23:15,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38706955] [2023-08-31 22:23:15,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:23:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:23:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:23:15,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:15,509 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 22:23:15,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:15,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:15,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:16,112 INFO L130 PetriNetUnfolder]: 224/395 cut-off events. [2023-08-31 22:23:16,112 INFO L131 PetriNetUnfolder]: For 4433/4433 co-relation queries the response was YES. [2023-08-31 22:23:16,114 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 22:23:16,115 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 36 selfloop transitions, 43 changer transitions 26/105 dead transitions. [2023-08-31 22:23:16,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 105 transitions, 1130 flow [2023-08-31 22:23:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:23:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:23:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2023-08-31 22:23:16,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4683159722222222 [2023-08-31 22:23:16,119 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2023-08-31 22:23:16,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2023-08-31 22:23:16,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:16,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2023-08-31 22:23:16,122 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 22:23:16,126 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 22:23:16,127 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 22:23:16,127 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 438 flow. Second operand 16 states and 1079 transitions. [2023-08-31 22:23:16,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 105 transitions, 1130 flow [2023-08-31 22:23:16,151 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 22:23:16,154 INFO L231 Difference]: Finished difference. Result has 84 places, 61 transitions, 837 flow [2023-08-31 22:23:16,155 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 22:23:16,156 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 60 predicate places. [2023-08-31 22:23:16,156 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 61 transitions, 837 flow [2023-08-31 22:23:16,157 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 22:23:16,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:16,157 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:16,171 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 22:23:16,366 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 22:23:16,367 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 22:23:16,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:16,367 INFO L85 PathProgramCache]: Analyzing trace with hash 380812761, now seen corresponding path program 6 times [2023-08-31 22:23:16,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:16,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146401962] [2023-08-31 22:23:16,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:23:16,368 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 22:23:16,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:16,369 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 22:23:16,373 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 22:23:16,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 22:23:16,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:16,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:16,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:16,503 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 22:23:16,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:16,648 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 22:23:16,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:16,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146401962] [2023-08-31 22:23:16,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146401962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:16,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:16,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:23:16,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619028048] [2023-08-31 22:23:16,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:16,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:23:16,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:16,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:23:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:23:16,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:16,722 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 22:23:16,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:16,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:16,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:17,133 INFO L130 PetriNetUnfolder]: 248/443 cut-off events. [2023-08-31 22:23:17,133 INFO L131 PetriNetUnfolder]: For 7883/7883 co-relation queries the response was YES. [2023-08-31 22:23:17,135 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 22:23:17,137 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 63 selfloop transitions, 19 changer transitions 19/101 dead transitions. [2023-08-31 22:23:17,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 101 transitions, 1393 flow [2023-08-31 22:23:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 22:23:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 22:23:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 809 transitions. [2023-08-31 22:23:17,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681712962962963 [2023-08-31 22:23:17,141 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 809 transitions. [2023-08-31 22:23:17,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 809 transitions. [2023-08-31 22:23:17,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:17,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 809 transitions. [2023-08-31 22:23:17,143 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 22:23:17,145 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 22:23:17,146 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 22:23:17,146 INFO L175 Difference]: Start difference. First operand has 84 places, 61 transitions, 837 flow. Second operand 12 states and 809 transitions. [2023-08-31 22:23:17,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 101 transitions, 1393 flow [2023-08-31 22:23:17,160 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 22:23:17,162 INFO L231 Difference]: Finished difference. Result has 92 places, 67 transitions, 738 flow [2023-08-31 22:23:17,162 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 22:23:17,163 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 68 predicate places. [2023-08-31 22:23:17,163 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 67 transitions, 738 flow [2023-08-31 22:23:17,163 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 22:23:17,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:17,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:17,175 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 22:23:17,372 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 22:23:17,373 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 22:23:17,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:17,373 INFO L85 PathProgramCache]: Analyzing trace with hash 404049741, now seen corresponding path program 7 times [2023-08-31 22:23:17,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:17,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723723309] [2023-08-31 22:23:17,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 22:23:17,374 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 22:23:17,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:17,375 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 22:23:17,378 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 22:23:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:17,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:17,502 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 22:23:17,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:17,661 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 22:23:17,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:17,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723723309] [2023-08-31 22:23:17,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723723309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:17,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:17,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:23:17,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897614431] [2023-08-31 22:23:17,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:17,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:23:17,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:17,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:23:17,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:23:17,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:17,745 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 22:23:17,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:17,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:17,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:18,371 INFO L130 PetriNetUnfolder]: 336/603 cut-off events. [2023-08-31 22:23:18,372 INFO L131 PetriNetUnfolder]: For 12794/12794 co-relation queries the response was YES. [2023-08-31 22:23:18,374 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 22:23:18,377 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 81 selfloop transitions, 37 changer transitions 14/132 dead transitions. [2023-08-31 22:23:18,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1675 flow [2023-08-31 22:23:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:23:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:23:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2023-08-31 22:23:18,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4683159722222222 [2023-08-31 22:23:18,383 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2023-08-31 22:23:18,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2023-08-31 22:23:18,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:18,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2023-08-31 22:23:18,387 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 22:23:18,390 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 22:23:18,391 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 22:23:18,391 INFO L175 Difference]: Start difference. First operand has 92 places, 67 transitions, 738 flow. Second operand 16 states and 1079 transitions. [2023-08-31 22:23:18,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1675 flow [2023-08-31 22:23:18,410 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 22:23:18,413 INFO L231 Difference]: Finished difference. Result has 111 places, 81 transitions, 1071 flow [2023-08-31 22:23:18,414 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 22:23:18,414 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 87 predicate places. [2023-08-31 22:23:18,414 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 81 transitions, 1071 flow [2023-08-31 22:23:18,415 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 22:23:18,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:18,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:18,427 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 22:23:18,624 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 22:23:18,624 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 22:23:18,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:18,625 INFO L85 PathProgramCache]: Analyzing trace with hash 404765841, now seen corresponding path program 8 times [2023-08-31 22:23:18,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:18,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288062257] [2023-08-31 22:23:18,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:18,626 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 22:23:18,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:18,627 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 22:23:18,629 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 22:23:18,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:18,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:18,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:23:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:18,747 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 22:23:18,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:18,898 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 22:23:18,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:18,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288062257] [2023-08-31 22:23:18,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288062257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:18,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:18,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:23:18,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038846412] [2023-08-31 22:23:18,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:18,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:23:18,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:18,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:23:18,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:23:18,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:18,959 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 22:23:18,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:18,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:18,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:19,688 INFO L130 PetriNetUnfolder]: 384/691 cut-off events. [2023-08-31 22:23:19,689 INFO L131 PetriNetUnfolder]: For 24504/24504 co-relation queries the response was YES. [2023-08-31 22:23:19,692 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 22:23:19,695 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 57 selfloop transitions, 70 changer transitions 30/157 dead transitions. [2023-08-31 22:23:19,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 157 transitions, 2462 flow [2023-08-31 22:23:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 22:23:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 22:23:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1213 transitions. [2023-08-31 22:23:19,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679783950617284 [2023-08-31 22:23:19,700 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1213 transitions. [2023-08-31 22:23:19,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1213 transitions. [2023-08-31 22:23:19,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:19,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1213 transitions. [2023-08-31 22:23:19,706 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 22:23:19,711 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 22:23:19,712 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 22:23:19,712 INFO L175 Difference]: Start difference. First operand has 111 places, 81 transitions, 1071 flow. Second operand 18 states and 1213 transitions. [2023-08-31 22:23:19,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 157 transitions, 2462 flow [2023-08-31 22:23:19,757 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 22:23:19,763 INFO L231 Difference]: Finished difference. Result has 131 places, 103 transitions, 1585 flow [2023-08-31 22:23:19,764 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 22:23:19,765 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 107 predicate places. [2023-08-31 22:23:19,765 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 103 transitions, 1585 flow [2023-08-31 22:23:19,766 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 22:23:19,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:19,766 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:19,776 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 22:23:19,973 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 22:23:19,973 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 22:23:19,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1570592883, now seen corresponding path program 9 times [2023-08-31 22:23:19,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:19,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597759005] [2023-08-31 22:23:19,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:23:19,974 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 22:23:19,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:19,975 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 22:23:19,975 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 22:23:20,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 22:23:20,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:20,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:23:20,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:20,157 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 22:23:20,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:20,456 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 22:23:20,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:20,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597759005] [2023-08-31 22:23:20,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597759005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:20,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:20,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-31 22:23:20,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337994312] [2023-08-31 22:23:20,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:20,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:23:20,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:20,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:23:20,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:23:20,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:20,630 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 22:23:20,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:20,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:20,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:21,879 INFO L130 PetriNetUnfolder]: 480/875 cut-off events. [2023-08-31 22:23:21,880 INFO L131 PetriNetUnfolder]: For 39162/39162 co-relation queries the response was YES. [2023-08-31 22:23:21,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6907 conditions, 875 events. 480/875 cut-off events. For 39162/39162 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4236 event pairs, 88 based on Foata normal form. 24/899 useless extension candidates. Maximal degree in co-relation 6853. Up to 401 conditions per place. [2023-08-31 22:23:21,890 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 98 selfloop transitions, 62 changer transitions 43/203 dead transitions. [2023-08-31 22:23:21,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 203 transitions, 3328 flow [2023-08-31 22:23:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 22:23:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 22:23:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1608 transitions. [2023-08-31 22:23:21,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2023-08-31 22:23:21,896 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1608 transitions. [2023-08-31 22:23:21,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1608 transitions. [2023-08-31 22:23:21,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:21,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1608 transitions. [2023-08-31 22:23:21,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.0) internal successors, (1608), 24 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:21,908 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 22:23:21,909 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 22:23:21,909 INFO L175 Difference]: Start difference. First operand has 131 places, 103 transitions, 1585 flow. Second operand 24 states and 1608 transitions. [2023-08-31 22:23:21,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 203 transitions, 3328 flow [2023-08-31 22:23:21,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 203 transitions, 2863 flow, removed 216 selfloop flow, removed 8 redundant places. [2023-08-31 22:23:21,989 INFO L231 Difference]: Finished difference. Result has 158 places, 129 transitions, 2038 flow [2023-08-31 22:23:21,990 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=2038, PETRI_PLACES=158, PETRI_TRANSITIONS=129} [2023-08-31 22:23:21,990 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 134 predicate places. [2023-08-31 22:23:21,990 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 129 transitions, 2038 flow [2023-08-31 22:23:21,991 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 22:23:21,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:21,991 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:22,004 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 22:23:22,201 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 22:23:22,201 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 22:23:22,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:22,202 INFO L85 PathProgramCache]: Analyzing trace with hash -925720759, now seen corresponding path program 10 times [2023-08-31 22:23:22,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:22,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152166477] [2023-08-31 22:23:22,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:23:22,203 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 22:23:22,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:22,204 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 22:23:22,207 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 22:23:22,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:23:22,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:23:22,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:22,361 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 22:23:22,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:22,639 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 22:23:22,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:22,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152166477] [2023-08-31 22:23:22,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152166477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:22,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:22,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-31 22:23:22,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311183482] [2023-08-31 22:23:22,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:22,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:23:22,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:23:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:23:22,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:22,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 129 transitions, 2038 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 22:23:22,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:22,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:22,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:24,627 INFO L130 PetriNetUnfolder]: 620/1139 cut-off events. [2023-08-31 22:23:24,627 INFO L131 PetriNetUnfolder]: For 60953/60953 co-relation queries the response was YES. [2023-08-31 22:23:24,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10311 conditions, 1139 events. 620/1139 cut-off events. For 60953/60953 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5735 event pairs, 38 based on Foata normal form. 24/1163 useless extension candidates. Maximal degree in co-relation 10247. Up to 388 conditions per place. [2023-08-31 22:23:24,644 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 97 selfloop transitions, 126 changer transitions 35/258 dead transitions. [2023-08-31 22:23:24,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 258 transitions, 4783 flow [2023-08-31 22:23:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 22:23:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 22:23:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2141 transitions. [2023-08-31 22:23:24,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4646267361111111 [2023-08-31 22:23:24,666 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2141 transitions. [2023-08-31 22:23:24,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2141 transitions. [2023-08-31 22:23:24,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:24,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2141 transitions. [2023-08-31 22:23:24,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.90625) internal successors, (2141), 32 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:24,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 144.0) internal successors, (4752), 33 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:24,676 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 144.0) internal successors, (4752), 33 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:24,676 INFO L175 Difference]: Start difference. First operand has 158 places, 129 transitions, 2038 flow. Second operand 32 states and 2141 transitions. [2023-08-31 22:23:24,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 258 transitions, 4783 flow [2023-08-31 22:23:24,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 258 transitions, 4264 flow, removed 237 selfloop flow, removed 10 redundant places. [2023-08-31 22:23:24,749 INFO L231 Difference]: Finished difference. Result has 189 places, 171 transitions, 3329 flow [2023-08-31 22:23:24,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3329, PETRI_PLACES=189, PETRI_TRANSITIONS=171} [2023-08-31 22:23:24,750 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 165 predicate places. [2023-08-31 22:23:24,750 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 171 transitions, 3329 flow [2023-08-31 22:23:24,750 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 22:23:24,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:24,751 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:24,765 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 22:23:24,959 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 22:23:24,960 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 22:23:24,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash -925004659, now seen corresponding path program 11 times [2023-08-31 22:23:24,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:24,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494561967] [2023-08-31 22:23:24,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:23:24,961 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 22:23:24,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:24,962 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 22:23:24,965 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 22:23:25,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 22:23:25,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:25,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:23:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:25,112 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 22:23:25,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:25,361 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 22:23:25,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:25,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494561967] [2023-08-31 22:23:25,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494561967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:25,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:25,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-31 22:23:25,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247056318] [2023-08-31 22:23:25,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:25,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:23:25,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:25,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:23:25,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:23:25,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:25,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 171 transitions, 3329 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 22:23:25,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:25,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:25,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:26,859 INFO L130 PetriNetUnfolder]: 648/1183 cut-off events. [2023-08-31 22:23:26,859 INFO L131 PetriNetUnfolder]: For 76878/76878 co-relation queries the response was YES. [2023-08-31 22:23:26,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11196 conditions, 1183 events. 648/1183 cut-off events. For 76878/76878 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6136 event pairs, 29 based on Foata normal form. 20/1203 useless extension candidates. Maximal degree in co-relation 11121. Up to 400 conditions per place. [2023-08-31 22:23:26,870 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 75 selfloop transitions, 135 changer transitions 50/260 dead transitions. [2023-08-31 22:23:26,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 260 transitions, 4953 flow [2023-08-31 22:23:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 22:23:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 22:23:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1877 transitions. [2023-08-31 22:23:26,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46552579365079366 [2023-08-31 22:23:26,874 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1877 transitions. [2023-08-31 22:23:26,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1877 transitions. [2023-08-31 22:23:26,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:26,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1877 transitions. [2023-08-31 22:23:26,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 67.03571428571429) internal successors, (1877), 28 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:26,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:26,883 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:26,883 INFO L175 Difference]: Start difference. First operand has 189 places, 171 transitions, 3329 flow. Second operand 28 states and 1877 transitions. [2023-08-31 22:23:26,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 260 transitions, 4953 flow [2023-08-31 22:23:27,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 260 transitions, 3899 flow, removed 477 selfloop flow, removed 21 redundant places. [2023-08-31 22:23:27,061 INFO L231 Difference]: Finished difference. Result has 196 places, 179 transitions, 2836 flow [2023-08-31 22:23:27,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2836, PETRI_PLACES=196, PETRI_TRANSITIONS=179} [2023-08-31 22:23:27,062 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 172 predicate places. [2023-08-31 22:23:27,062 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 179 transitions, 2836 flow [2023-08-31 22:23:27,063 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 22:23:27,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:27,064 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:27,073 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 22:23:27,272 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 22:23:27,272 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 22:23:27,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:27,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2014607281, now seen corresponding path program 12 times [2023-08-31 22:23:27,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:27,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403265465] [2023-08-31 22:23:27,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:23:27,273 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 22:23:27,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:27,274 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 22:23:27,277 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 22:23:27,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 22:23:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:27,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:23:27,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:27,432 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 22:23:27,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:27,760 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 22:23:27,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:23:27,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403265465] [2023-08-31 22:23:27,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403265465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:27,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:23:27,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-31 22:23:27,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265289488] [2023-08-31 22:23:27,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:27,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:23:27,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:23:27,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:23:27,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:23:27,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-31 22:23:27,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 179 transitions, 2836 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 22:23:27,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:27,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-31 22:23:27,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:29,332 INFO L130 PetriNetUnfolder]: 732/1323 cut-off events. [2023-08-31 22:23:29,332 INFO L131 PetriNetUnfolder]: For 76687/76687 co-relation queries the response was YES. [2023-08-31 22:23:29,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11672 conditions, 1323 events. 732/1323 cut-off events. For 76687/76687 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6818 event pairs, 20 based on Foata normal form. 28/1351 useless extension candidates. Maximal degree in co-relation 11599. Up to 368 conditions per place. [2023-08-31 22:23:29,346 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 71 selfloop transitions, 169 changer transitions 50/290 dead transitions. [2023-08-31 22:23:29,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 290 transitions, 5392 flow [2023-08-31 22:23:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 22:23:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 22:23:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1880 transitions. [2023-08-31 22:23:29,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662698412698413 [2023-08-31 22:23:29,352 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1880 transitions. [2023-08-31 22:23:29,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1880 transitions. [2023-08-31 22:23:29,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:29,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1880 transitions. [2023-08-31 22:23:29,357 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 22:23:29,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:29,362 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:29,362 INFO L175 Difference]: Start difference. First operand has 196 places, 179 transitions, 2836 flow. Second operand 28 states and 1880 transitions. [2023-08-31 22:23:29,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 290 transitions, 5392 flow [2023-08-31 22:23:29,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 290 transitions, 5033 flow, removed 108 selfloop flow, removed 22 redundant places. [2023-08-31 22:23:29,484 INFO L231 Difference]: Finished difference. Result has 215 places, 202 transitions, 3869 flow [2023-08-31 22:23:29,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3869, PETRI_PLACES=215, PETRI_TRANSITIONS=202} [2023-08-31 22:23:29,485 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 191 predicate places. [2023-08-31 22:23:29,485 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 202 transitions, 3869 flow [2023-08-31 22:23:29,486 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 22:23:29,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:29,486 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:29,492 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 (21)] Ended with exit code 0 [2023-08-31 22:23:29,686 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 22:23:29,686 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 22:23:29,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1877662425, now seen corresponding path program 13 times [2023-08-31 22:23:29,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:23:29,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580101058] [2023-08-31 22:23:29,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 22:23:29,687 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 22:23:29,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:23:29,688 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 22:23:29,690 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 22:23:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:23:29,754 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:23:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:23:29,838 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-31 22:23:29,840 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:23:29,841 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (7 of 8 remaining) [2023-08-31 22:23:29,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-31 22:23:29,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-31 22:23:29,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-31 22:23:29,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-08-31 22:23:29,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-31 22:23:29,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 8 remaining) [2023-08-31 22:23:29,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 8 remaining) [2023-08-31 22:23:29,879 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 22:23:30,073 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 22:23:30,073 INFO L445 BasicCegarLoop]: Path program histogram: [13, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:30,077 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:23:30,077 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:23:30,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:23:30 BasicIcfg [2023-08-31 22:23:30,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:23:30,119 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:23:30,119 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:23:30,120 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:23:30,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:23:04" (3/4) ... [2023-08-31 22:23:30,122 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:23:30,122 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:23:30,123 INFO L158 Benchmark]: Toolchain (without parser) took 26487.40ms. Allocated memory was 75.5MB in the beginning and 207.6MB in the end (delta: 132.1MB). Free memory was 52.4MB in the beginning and 75.5MB in the end (delta: -23.1MB). Peak memory consumption was 110.8MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,123 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 62.9MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:23:30,123 INFO L158 Benchmark]: CACSL2BoogieTranslator took 461.49ms. Allocated memory is still 75.5MB. Free memory was 52.2MB in the beginning and 50.0MB in the end (delta: 2.2MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,123 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.84ms. Allocated memory is still 75.5MB. Free memory was 50.0MB in the beginning and 47.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,124 INFO L158 Benchmark]: Boogie Preprocessor took 46.94ms. Allocated memory is still 75.5MB. Free memory was 47.9MB in the beginning and 46.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:23:30,124 INFO L158 Benchmark]: RCFGBuilder took 521.45ms. Allocated memory is still 75.5MB. Free memory was 46.2MB in the beginning and 31.8MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,124 INFO L158 Benchmark]: TraceAbstraction took 25388.51ms. Allocated memory was 75.5MB in the beginning and 207.6MB in the end (delta: 132.1MB). Free memory was 31.1MB in the beginning and 76.5MB in the end (delta: -45.4MB). Peak memory consumption was 85.0MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,125 INFO L158 Benchmark]: Witness Printer took 3.08ms. Allocated memory is still 207.6MB. Free memory was 76.5MB in the beginning and 75.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:23:30,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 62.9MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 461.49ms. Allocated memory is still 75.5MB. Free memory was 52.2MB in the beginning and 50.0MB in the end (delta: 2.2MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.84ms. Allocated memory is still 75.5MB. Free memory was 50.0MB in the beginning and 47.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.94ms. Allocated memory is still 75.5MB. Free memory was 47.9MB in the beginning and 46.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 521.45ms. Allocated memory is still 75.5MB. Free memory was 46.2MB in the beginning and 31.8MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 25388.51ms. Allocated memory was 75.5MB in the beginning and 207.6MB in the end (delta: 132.1MB). Free memory was 31.1MB in the beginning and 76.5MB in the end (delta: -45.4MB). Peak memory consumption was 85.0MB. Max. memory is 16.1GB. * Witness Printer took 3.08ms. Allocated memory is still 207.6MB. Free memory was 76.5MB in the beginning and 75.5MB 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: 3.9s, 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)=17, arg={0:0}, argc=17, argv={19:18}, argv={19:18}, 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)=17, arg={0:0}, arg={0:0}, arg={0:0}, argc=17, argv={19:18}, argv={19:18}, 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 < 5 [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*5 +6); VAL [\old(argc)=17, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=17, argv={19:18}, argv={19:18}, condI=0, i=7, id1={7:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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 < 5 [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] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=17, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=17, argv={19:18}, argv={19:18}, condI=0, condJ=1, i=15, id1={7:0}, id2={3:0}, j=16, k=5, k=5] - 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: 25.2s, OverallIterations: 21, TraceHistogramMax: 5, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 9 mSolverCounterUnknown, 2079 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1907 mSDsluCounter, 503 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 462 mSDsCounter, 208 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5174 IncrementalHoareTripleChecker+Invalid, 5391 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 208 mSolverCounterUnsat, 41 mSDtfsCounter, 5174 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 422 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3869occurred in iteration=20, InterpolantAutomatonStates: 238, 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, 0.5s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 206 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 264 ConstructedInterpolants, 6 QuantifiedInterpolants, 1976 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1377 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 28 InterpolantComputations, 12 PerfectInterpolantSequences, 8/80 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 22:23:30,146 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