./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/singleton.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/singleton.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 ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 02:15:55,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:15:55,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:15:55,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:15:55,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:15:55,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:15:55,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:15:55,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:15:55,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:15:55,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:15:55,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:15:55,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:15:55,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:15:55,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:15:55,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:15:55,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:15:55,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:15:55,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:15:55,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:15:55,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:15:55,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:15:55,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:15:55,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:15:55,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:15:55,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:15:55,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:15:55,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:15:55,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:15:55,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:15:55,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:15:55,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:15:55,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:15:55,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:15:55,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:15:55,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:15:55,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:15:55,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:15:55,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:15:55,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:15:55,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:15:55,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:15:55,151 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:15:55,174 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:15:55,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:15:55,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:15:55,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:15:55,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:15:55,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:15:55,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:15:55,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:15:55,177 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:15:55,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:15:55,177 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:15:55,178 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:15:55,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:15:55,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:15:55,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:15:55,178 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:15:55,179 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:15:55,179 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:15:55,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:15:55,179 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:15:55,179 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:15:55,180 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:15:55,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:15:55,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:15:55,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:15:55,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:15:55,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:15:55,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:15:55,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:15:55,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:15:55,181 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:15:55,182 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:15:55,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:15:55,182 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:15:55,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:15:55,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:15:55,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:15:55,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:15:55,493 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:15:55,493 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:15:55,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/singleton.i [2023-08-30 02:15:56,694 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:15:56,940 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:15:56,944 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/singleton.i [2023-08-30 02:15:56,972 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbf7062ce/da511959ed2a465c932f74bdd821d0be/FLAGb2b7a2979 [2023-08-30 02:15:56,990 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbf7062ce/da511959ed2a465c932f74bdd821d0be [2023-08-30 02:15:56,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:15:56,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:15:56,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:15:56,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:15:57,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:15:57,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:15:56" (1/1) ... [2023-08-30 02:15:57,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a476f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57, skipping insertion in model container [2023-08-30 02:15:57,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:15:56" (1/1) ... [2023-08-30 02:15:57,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:15:57,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:15:57,258 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 02:15:57,423 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/singleton.i[55547,55560] [2023-08-30 02:15:57,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:15:57,467 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:15:57,496 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 02:15:57,524 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/singleton.i[55547,55560] [2023-08-30 02:15:57,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:15:57,600 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 02:15:57,600 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 02:15:57,600 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 02:15:57,606 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:15:57,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57 WrapperNode [2023-08-30 02:15:57,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:15:57,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:15:57,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:15:57,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:15:57,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,647 INFO L138 Inliner]: procedures = 325, calls = 52, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2023-08-30 02:15:57,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:15:57,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:15:57,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:15:57,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:15:57,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,679 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:15:57,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:15:57,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:15:57,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:15:57,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (1/1) ... [2023-08-30 02:15:57,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:15:57,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:15:57,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 02:15:57,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 02:15:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 02:15:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:15:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:15:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 02:15:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:15:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2023-08-30 02:15:57,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2023-08-30 02:15:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 02:15:57,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 02:15:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 02:15:57,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 02:15:57,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 02:15:57,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 02:15:57,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:15:57,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 02:15:57,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:15:57,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:15:57,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:15:57,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:15:57,781 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 02:15:57,961 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:15:57,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:15:58,292 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:15:58,299 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:15:58,299 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 02:15:58,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:15:58 BoogieIcfgContainer [2023-08-30 02:15:58,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:15:58,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:15:58,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:15:58,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:15:58,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:15:56" (1/3) ... [2023-08-30 02:15:58,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ae63db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:15:58, skipping insertion in model container [2023-08-30 02:15:58,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:15:57" (2/3) ... [2023-08-30 02:15:58,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ae63db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:15:58, skipping insertion in model container [2023-08-30 02:15:58,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:15:58" (3/3) ... [2023-08-30 02:15:58,312 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton.i [2023-08-30 02:15:58,327 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:15:58,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-30 02:15:58,327 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:15:58,520 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2023-08-30 02:15:58,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 242 transitions, 591 flow [2023-08-30 02:15:58,650 INFO L130 PetriNetUnfolder]: 6/163 cut-off events. [2023-08-30 02:15:58,651 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 02:15:58,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 163 events. 6/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 174 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2023-08-30 02:15:58,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 242 transitions, 591 flow [2023-08-30 02:15:58,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 159 transitions, 369 flow [2023-08-30 02:15:58,668 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:15:58,679 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 159 transitions, 369 flow [2023-08-30 02:15:58,683 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 159 transitions, 369 flow [2023-08-30 02:15:58,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 159 transitions, 369 flow [2023-08-30 02:15:58,737 INFO L130 PetriNetUnfolder]: 6/159 cut-off events. [2023-08-30 02:15:58,737 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 02:15:58,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 159 events. 6/159 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2023-08-30 02:15:58,741 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-08-30 02:16:01,917 INFO L134 LiptonReduction]: Checked pairs total: 6871 [2023-08-30 02:16:01,917 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-30 02:16:01,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:16:01,985 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;@7d659ee3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:16:01,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-08-30 02:16:01,987 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:16:01,987 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:16:01,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:01,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:16:01,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:01,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash 609, now seen corresponding path program 1 times [2023-08-30 02:16:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:02,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721316178] [2023-08-30 02:16:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:02,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:02,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721316178] [2023-08-30 02:16:02,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721316178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:02,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:02,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:16:02,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647028726] [2023-08-30 02:16:02,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:02,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:16:02,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:02,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:16:02,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:16:02,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 370 [2023-08-30 02:16:02,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 221 flow. Second operand has 2 states, 2 states have (on average 211.5) internal successors, (423), 2 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:02,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:02,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 370 [2023-08-30 02:16:02,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:04,164 INFO L130 PetriNetUnfolder]: 19439/26681 cut-off events. [2023-08-30 02:16:04,164 INFO L131 PetriNetUnfolder]: For 949/949 co-relation queries the response was YES. [2023-08-30 02:16:04,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53377 conditions, 26681 events. 19439/26681 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145297 event pairs, 19095 based on Foata normal form. 0/9506 useless extension candidates. Maximal degree in co-relation 53352. Up to 25310 conditions per place. [2023-08-30 02:16:04,406 INFO L137 encePairwiseOnDemand]: 368/370 looper letters, 64 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2023-08-30 02:16:04,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 345 flow [2023-08-30 02:16:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:16:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:16:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 488 transitions. [2023-08-30 02:16:04,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594594594594595 [2023-08-30 02:16:04,426 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 488 transitions. [2023-08-30 02:16:04,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 488 transitions. [2023-08-30 02:16:04,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:04,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 488 transitions. [2023-08-30 02:16:04,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.0) internal successors, (488), 2 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:04,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:04,441 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:04,442 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 221 flow. Second operand 2 states and 488 transitions. [2023-08-30 02:16:04,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 345 flow [2023-08-30 02:16:04,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 311 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-30 02:16:04,473 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2023-08-30 02:16:04,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-08-30 02:16:04,480 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2023-08-30 02:16:04,480 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2023-08-30 02:16:04,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 211.5) internal successors, (423), 2 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:04,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:04,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:16:04,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:16:04,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:04,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:04,489 INFO L85 PathProgramCache]: Analyzing trace with hash 597789, now seen corresponding path program 1 times [2023-08-30 02:16:04,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:04,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056164059] [2023-08-30 02:16:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:04,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:04,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:04,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056164059] [2023-08-30 02:16:04,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056164059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:04,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:04,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:16:04,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841711203] [2023-08-30 02:16:04,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:04,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:04,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:04,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:04,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 370 [2023-08-30 02:16:04,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:04,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:04,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 370 [2023-08-30 02:16:04,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:06,019 INFO L130 PetriNetUnfolder]: 14219/19666 cut-off events. [2023-08-30 02:16:06,019 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2023-08-30 02:16:06,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38568 conditions, 19666 events. 14219/19666 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104265 event pairs, 13951 based on Foata normal form. 0/7508 useless extension candidates. Maximal degree in co-relation 38565. Up to 18601 conditions per place. [2023-08-30 02:16:06,104 INFO L137 encePairwiseOnDemand]: 361/370 looper letters, 68 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-08-30 02:16:06,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 358 flow [2023-08-30 02:16:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2023-08-30 02:16:06,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590990990990991 [2023-08-30 02:16:06,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2023-08-30 02:16:06,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2023-08-30 02:16:06,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:06,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2023-08-30 02:16:06,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:06,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:06,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:06,111 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 656 transitions. [2023-08-30 02:16:06,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 358 flow [2023-08-30 02:16:06,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:16:06,113 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 241 flow [2023-08-30 02:16:06,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2023-08-30 02:16:06,114 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2023-08-30 02:16:06,114 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 241 flow [2023-08-30 02:16:06,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:06,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:06,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:16:06,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:16:06,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:06,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:06,115 INFO L85 PathProgramCache]: Analyzing trace with hash 597790, now seen corresponding path program 1 times [2023-08-30 02:16:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:06,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305642413] [2023-08-30 02:16:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:06,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:06,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:06,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305642413] [2023-08-30 02:16:06,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305642413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:06,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:06,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:16:06,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813214396] [2023-08-30 02:16:06,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:06,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:06,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:06,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 370 [2023-08-30 02:16:06,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:06,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:06,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 370 [2023-08-30 02:16:06,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:07,694 INFO L130 PetriNetUnfolder]: 17984/25240 cut-off events. [2023-08-30 02:16:07,694 INFO L131 PetriNetUnfolder]: For 1761/1761 co-relation queries the response was YES. [2023-08-30 02:16:07,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50992 conditions, 25240 events. 17984/25240 cut-off events. For 1761/1761 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143911 event pairs, 16168 based on Foata normal form. 1/10995 useless extension candidates. Maximal degree in co-relation 50987. Up to 17180 conditions per place. [2023-08-30 02:16:07,817 INFO L137 encePairwiseOnDemand]: 358/370 looper letters, 121 selfloop transitions, 13 changer transitions 0/151 dead transitions. [2023-08-30 02:16:07,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 663 flow [2023-08-30 02:16:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2023-08-30 02:16:07,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6522522522522523 [2023-08-30 02:16:07,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2023-08-30 02:16:07,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2023-08-30 02:16:07,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:07,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2023-08-30 02:16:07,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:07,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:07,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:07,824 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 241 flow. Second operand 3 states and 724 transitions. [2023-08-30 02:16:07,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 663 flow [2023-08-30 02:16:07,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 151 transitions, 645 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:07,829 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 319 flow [2023-08-30 02:16:07,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2023-08-30 02:16:07,830 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2023-08-30 02:16:07,831 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 319 flow [2023-08-30 02:16:07,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:07,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:07,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:16:07,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:16:07,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:07,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:07,832 INFO L85 PathProgramCache]: Analyzing trace with hash 18530298, now seen corresponding path program 1 times [2023-08-30 02:16:07,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:07,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950306537] [2023-08-30 02:16:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:07,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:07,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:07,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950306537] [2023-08-30 02:16:07,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950306537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:07,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:07,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:16:07,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158729633] [2023-08-30 02:16:07,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:07,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:07,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:07,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:07,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 370 [2023-08-30 02:16:07,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:07,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:07,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 370 [2023-08-30 02:16:07,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:09,317 INFO L130 PetriNetUnfolder]: 17970/25215 cut-off events. [2023-08-30 02:16:09,317 INFO L131 PetriNetUnfolder]: For 10544/10544 co-relation queries the response was YES. [2023-08-30 02:16:09,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55365 conditions, 25215 events. 17970/25215 cut-off events. For 10544/10544 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143802 event pairs, 17598 based on Foata normal form. 11/10983 useless extension candidates. Maximal degree in co-relation 55359. Up to 23810 conditions per place. [2023-08-30 02:16:09,484 INFO L137 encePairwiseOnDemand]: 367/370 looper letters, 76 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2023-08-30 02:16:09,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 491 flow [2023-08-30 02:16:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-08-30 02:16:09,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6162162162162163 [2023-08-30 02:16:09,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-08-30 02:16:09,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-08-30 02:16:09,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:09,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-08-30 02:16:09,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:09,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:09,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:09,491 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 319 flow. Second operand 3 states and 684 transitions. [2023-08-30 02:16:09,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 491 flow [2023-08-30 02:16:09,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 102 transitions, 463 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:09,503 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 304 flow [2023-08-30 02:16:09,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2023-08-30 02:16:09,503 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -6 predicate places. [2023-08-30 02:16:09,504 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 304 flow [2023-08-30 02:16:09,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:09,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:09,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:09,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:16:09,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:09,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1755476090, now seen corresponding path program 1 times [2023-08-30 02:16:09,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:09,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781940433] [2023-08-30 02:16:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:09,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:09,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:09,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781940433] [2023-08-30 02:16:09,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781940433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:09,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:09,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:16:09,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858748727] [2023-08-30 02:16:09,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:09,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:16:09,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:16:09,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:16:10,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 370 [2023-08-30 02:16:10,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:10,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:10,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 370 [2023-08-30 02:16:10,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:11,310 INFO L130 PetriNetUnfolder]: 17958/25184 cut-off events. [2023-08-30 02:16:11,310 INFO L131 PetriNetUnfolder]: For 9038/9038 co-relation queries the response was YES. [2023-08-30 02:16:11,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55274 conditions, 25184 events. 17958/25184 cut-off events. For 9038/9038 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143617 event pairs, 17597 based on Foata normal form. 0/10962 useless extension candidates. Maximal degree in co-relation 55267. Up to 23762 conditions per place. [2023-08-30 02:16:11,505 INFO L137 encePairwiseOnDemand]: 364/370 looper letters, 71 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-30 02:16:11,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 436 flow [2023-08-30 02:16:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-30 02:16:11,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5774774774774775 [2023-08-30 02:16:11,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-30 02:16:11,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-30 02:16:11,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:11,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-30 02:16:11,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:11,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:11,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:11,514 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 304 flow. Second operand 3 states and 641 transitions. [2023-08-30 02:16:11,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 436 flow [2023-08-30 02:16:11,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:11,519 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 282 flow [2023-08-30 02:16:11,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2023-08-30 02:16:11,522 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2023-08-30 02:16:11,523 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 282 flow [2023-08-30 02:16:11,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:11,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:11,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:11,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:16:11,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:11,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1852886289, now seen corresponding path program 1 times [2023-08-30 02:16:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:11,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275527686] [2023-08-30 02:16:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:11,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:11,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:11,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275527686] [2023-08-30 02:16:11,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275527686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:11,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:11,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:16:11,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600630724] [2023-08-30 02:16:11,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:11,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 02:16:11,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:11,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 02:16:11,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-08-30 02:16:12,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 370 [2023-08-30 02:16:12,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 282 flow. Second operand has 8 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:12,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:12,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 370 [2023-08-30 02:16:12,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:13,492 INFO L130 PetriNetUnfolder]: 12743/18173 cut-off events. [2023-08-30 02:16:13,492 INFO L131 PetriNetUnfolder]: For 8963/8963 co-relation queries the response was YES. [2023-08-30 02:16:13,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38580 conditions, 18173 events. 12743/18173 cut-off events. For 8963/8963 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102685 event pairs, 12473 based on Foata normal form. 1457/8961 useless extension candidates. Maximal degree in co-relation 38573. Up to 17099 conditions per place. [2023-08-30 02:16:13,595 INFO L137 encePairwiseOnDemand]: 359/370 looper letters, 63 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2023-08-30 02:16:13,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 441 flow [2023-08-30 02:16:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:16:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:16:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1004 transitions. [2023-08-30 02:16:13,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427027027027027 [2023-08-30 02:16:13,598 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1004 transitions. [2023-08-30 02:16:13,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1004 transitions. [2023-08-30 02:16:13,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:13,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1004 transitions. [2023-08-30 02:16:13,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.8) internal successors, (1004), 5 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) [2023-08-30 02:16:13,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:13,604 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:13,604 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 282 flow. Second operand 5 states and 1004 transitions. [2023-08-30 02:16:13,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 441 flow [2023-08-30 02:16:13,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 96 transitions, 434 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:16:13,608 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 321 flow [2023-08-30 02:16:13,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2023-08-30 02:16:13,609 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -8 predicate places. [2023-08-30 02:16:13,609 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 321 flow [2023-08-30 02:16:13,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:13,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:13,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:13,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:16:13,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:13,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash 415710710, now seen corresponding path program 1 times [2023-08-30 02:16:13,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:13,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878454188] [2023-08-30 02:16:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:13,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:13,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:13,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878454188] [2023-08-30 02:16:13,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878454188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:13,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:13,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 02:16:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963171002] [2023-08-30 02:16:13,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:13,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:16:13,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:16:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:16:14,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 370 [2023-08-30 02:16:14,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 321 flow. Second operand has 6 states, 6 states have (on average 192.83333333333334) internal successors, (1157), 6 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:14,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:14,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 370 [2023-08-30 02:16:14,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:15,004 INFO L130 PetriNetUnfolder]: 7621/11509 cut-off events. [2023-08-30 02:16:15,004 INFO L131 PetriNetUnfolder]: For 3090/3090 co-relation queries the response was YES. [2023-08-30 02:16:15,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24258 conditions, 11509 events. 7621/11509 cut-off events. For 3090/3090 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 66098 event pairs, 7351 based on Foata normal form. 0/5454 useless extension candidates. Maximal degree in co-relation 24250. Up to 10435 conditions per place. [2023-08-30 02:16:15,060 INFO L137 encePairwiseOnDemand]: 363/370 looper letters, 65 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2023-08-30 02:16:15,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 459 flow [2023-08-30 02:16:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:16:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:16:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 827 transitions. [2023-08-30 02:16:15,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587837837837838 [2023-08-30 02:16:15,064 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 827 transitions. [2023-08-30 02:16:15,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 827 transitions. [2023-08-30 02:16:15,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:15,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 827 transitions. [2023-08-30 02:16:15,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,070 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 321 flow. Second operand 4 states and 827 transitions. [2023-08-30 02:16:15,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 459 flow [2023-08-30 02:16:15,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:15,074 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 317 flow [2023-08-30 02:16:15,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2023-08-30 02:16:15,075 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -11 predicate places. [2023-08-30 02:16:15,075 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 317 flow [2023-08-30 02:16:15,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.83333333333334) internal successors, (1157), 6 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:15,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:15,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:16:15,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:15,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash 66046588, now seen corresponding path program 1 times [2023-08-30 02:16:15,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:15,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382077891] [2023-08-30 02:16:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:15,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:15,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:15,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382077891] [2023-08-30 02:16:15,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382077891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:15,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:15,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:16:15,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696303460] [2023-08-30 02:16:15,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:15,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:15,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:15,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:15,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 370 [2023-08-30 02:16:15,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:15,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 370 [2023-08-30 02:16:15,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:15,529 INFO L130 PetriNetUnfolder]: 2579/4199 cut-off events. [2023-08-30 02:16:15,529 INFO L131 PetriNetUnfolder]: For 1255/1255 co-relation queries the response was YES. [2023-08-30 02:16:15,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8899 conditions, 4199 events. 2579/4199 cut-off events. For 1255/1255 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21781 event pairs, 2441 based on Foata normal form. 0/2446 useless extension candidates. Maximal degree in co-relation 8891. Up to 3688 conditions per place. [2023-08-30 02:16:15,548 INFO L137 encePairwiseOnDemand]: 364/370 looper letters, 66 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-30 02:16:15,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 85 transitions, 451 flow [2023-08-30 02:16:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-30 02:16:15,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891891891891892 [2023-08-30 02:16:15,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-30 02:16:15,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-30 02:16:15,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:15,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-30 02:16:15,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,555 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 317 flow. Second operand 3 states and 654 transitions. [2023-08-30 02:16:15,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 85 transitions, 451 flow [2023-08-30 02:16:15,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 85 transitions, 441 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:16:15,558 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 301 flow [2023-08-30 02:16:15,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2023-08-30 02:16:15,559 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -17 predicate places. [2023-08-30 02:16:15,559 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 301 flow [2023-08-30 02:16:15,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:15,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:15,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:16:15,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:15,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash 70209109, now seen corresponding path program 1 times [2023-08-30 02:16:15,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:15,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185060943] [2023-08-30 02:16:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:15,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:15,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:15,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185060943] [2023-08-30 02:16:15,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185060943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:15,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:15,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:16:15,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989442094] [2023-08-30 02:16:15,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:15,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:15,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:15,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 370 [2023-08-30 02:16:15,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:15,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 370 [2023-08-30 02:16:15,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:15,854 INFO L130 PetriNetUnfolder]: 575/1130 cut-off events. [2023-08-30 02:16:15,854 INFO L131 PetriNetUnfolder]: For 427/427 co-relation queries the response was YES. [2023-08-30 02:16:15,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2468 conditions, 1130 events. 575/1130 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4804 event pairs, 512 based on Foata normal form. 0/910 useless extension candidates. Maximal degree in co-relation 2460. Up to 884 conditions per place. [2023-08-30 02:16:15,859 INFO L137 encePairwiseOnDemand]: 363/370 looper letters, 56 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-30 02:16:15,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 421 flow [2023-08-30 02:16:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2023-08-30 02:16:15,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558558558558558 [2023-08-30 02:16:15,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2023-08-30 02:16:15,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2023-08-30 02:16:15,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:15,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2023-08-30 02:16:15,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,866 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 301 flow. Second operand 3 states and 617 transitions. [2023-08-30 02:16:15,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 421 flow [2023-08-30 02:16:15,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 419 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:16:15,869 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 299 flow [2023-08-30 02:16:15,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-08-30 02:16:15,870 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -20 predicate places. [2023-08-30 02:16:15,870 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 299 flow [2023-08-30 02:16:15,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:15,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:15,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:15,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:16:15,871 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:15,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:15,872 INFO L85 PathProgramCache]: Analyzing trace with hash 70209171, now seen corresponding path program 1 times [2023-08-30 02:16:15,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:15,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398980492] [2023-08-30 02:16:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:15,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:15,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:15,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398980492] [2023-08-30 02:16:15,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398980492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:15,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:15,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:16:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325420342] [2023-08-30 02:16:15,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:15,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:15,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:16,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 370 [2023-08-30 02:16:16,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:16,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 370 [2023-08-30 02:16:16,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:16,206 INFO L130 PetriNetUnfolder]: 614/1139 cut-off events. [2023-08-30 02:16:16,206 INFO L131 PetriNetUnfolder]: For 440/440 co-relation queries the response was YES. [2023-08-30 02:16:16,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2561 conditions, 1139 events. 614/1139 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4522 event pairs, 554 based on Foata normal form. 0/976 useless extension candidates. Maximal degree in co-relation 2553. Up to 955 conditions per place. [2023-08-30 02:16:16,211 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 58 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-08-30 02:16:16,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 78 transitions, 423 flow [2023-08-30 02:16:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-30 02:16:16,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702702702702702 [2023-08-30 02:16:16,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-30 02:16:16,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-30 02:16:16,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:16,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-30 02:16:16,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,217 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 299 flow. Second operand 3 states and 633 transitions. [2023-08-30 02:16:16,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 78 transitions, 423 flow [2023-08-30 02:16:16,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 78 transitions, 415 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:16,221 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 293 flow [2023-08-30 02:16:16,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2023-08-30 02:16:16,223 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -22 predicate places. [2023-08-30 02:16:16,223 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 293 flow [2023-08-30 02:16:16,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:16,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:16,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:16:16,224 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:16,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:16,225 INFO L85 PathProgramCache]: Analyzing trace with hash 70209173, now seen corresponding path program 1 times [2023-08-30 02:16:16,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:16,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754508173] [2023-08-30 02:16:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:16,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:16,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:16,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754508173] [2023-08-30 02:16:16,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754508173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:16,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:16,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 02:16:16,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957521738] [2023-08-30 02:16:16,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:16,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:16:16,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:16:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:16:16,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 370 [2023-08-30 02:16:16,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:16,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 370 [2023-08-30 02:16:16,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:16,763 INFO L130 PetriNetUnfolder]: 609/1104 cut-off events. [2023-08-30 02:16:16,763 INFO L131 PetriNetUnfolder]: For 429/429 co-relation queries the response was YES. [2023-08-30 02:16:16,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2505 conditions, 1104 events. 609/1104 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4223 event pairs, 546 based on Foata normal form. 0/944 useless extension candidates. Maximal degree in co-relation 2497. Up to 944 conditions per place. [2023-08-30 02:16:16,766 INFO L137 encePairwiseOnDemand]: 365/370 looper letters, 57 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2023-08-30 02:16:16,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 435 flow [2023-08-30 02:16:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:16:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:16:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 816 transitions. [2023-08-30 02:16:16,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5513513513513514 [2023-08-30 02:16:16,768 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 816 transitions. [2023-08-30 02:16:16,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 816 transitions. [2023-08-30 02:16:16,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:16,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 816 transitions. [2023-08-30 02:16:16,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,772 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 293 flow. Second operand 4 states and 816 transitions. [2023-08-30 02:16:16,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 435 flow [2023-08-30 02:16:16,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 429 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:16,774 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 293 flow [2023-08-30 02:16:16,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2023-08-30 02:16:16,775 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -23 predicate places. [2023-08-30 02:16:16,775 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 293 flow [2023-08-30 02:16:16,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:16,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:16,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:16:16,776 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:16,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:16,776 INFO L85 PathProgramCache]: Analyzing trace with hash -953664904, now seen corresponding path program 1 times [2023-08-30 02:16:16,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:16,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87995086] [2023-08-30 02:16:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:16,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:16,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:16,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87995086] [2023-08-30 02:16:16,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87995086] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:16,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:16,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:16:16,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509937325] [2023-08-30 02:16:16,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:16,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:16,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:16,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:16,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:16,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 370 [2023-08-30 02:16:16,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:16,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:16,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 370 [2023-08-30 02:16:16,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:17,059 INFO L130 PetriNetUnfolder]: 565/1036 cut-off events. [2023-08-30 02:16:17,059 INFO L131 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2023-08-30 02:16:17,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1036 events. 565/1036 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3933 event pairs, 505 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 2350. Up to 875 conditions per place. [2023-08-30 02:16:17,062 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 56 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-30 02:16:17,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 413 flow [2023-08-30 02:16:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-08-30 02:16:17,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684684684684684 [2023-08-30 02:16:17,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-08-30 02:16:17,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-08-30 02:16:17,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:17,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-08-30 02:16:17,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,086 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 293 flow. Second operand 3 states and 631 transitions. [2023-08-30 02:16:17,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 413 flow [2023-08-30 02:16:17,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 403 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:16:17,089 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 285 flow [2023-08-30 02:16:17,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2023-08-30 02:16:17,090 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -26 predicate places. [2023-08-30 02:16:17,090 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 285 flow [2023-08-30 02:16:17,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:17,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:17,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:16:17,091 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:17,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -953664903, now seen corresponding path program 1 times [2023-08-30 02:16:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:17,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919441043] [2023-08-30 02:16:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:17,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:17,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:17,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919441043] [2023-08-30 02:16:17,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919441043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:17,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:17,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 02:16:17,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285569572] [2023-08-30 02:16:17,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:17,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:16:17,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:17,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:16:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:16:17,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 370 [2023-08-30 02:16:17,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:17,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 370 [2023-08-30 02:16:17,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:17,589 INFO L130 PetriNetUnfolder]: 549/996 cut-off events. [2023-08-30 02:16:17,590 INFO L131 PetriNetUnfolder]: For 399/399 co-relation queries the response was YES. [2023-08-30 02:16:17,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277 conditions, 996 events. 549/996 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3694 event pairs, 488 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 2269. Up to 847 conditions per place. [2023-08-30 02:16:17,594 INFO L137 encePairwiseOnDemand]: 365/370 looper letters, 55 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-30 02:16:17,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 423 flow [2023-08-30 02:16:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:16:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:16:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 814 transitions. [2023-08-30 02:16:17,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-30 02:16:17,597 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 814 transitions. [2023-08-30 02:16:17,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 814 transitions. [2023-08-30 02:16:17,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:17,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 814 transitions. [2023-08-30 02:16:17,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,601 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,602 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 285 flow. Second operand 4 states and 814 transitions. [2023-08-30 02:16:17,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 423 flow [2023-08-30 02:16:17,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:17,604 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 285 flow [2023-08-30 02:16:17,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2023-08-30 02:16:17,605 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -27 predicate places. [2023-08-30 02:16:17,605 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 285 flow [2023-08-30 02:16:17,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:17,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:17,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:16:17,607 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:17,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1643925701, now seen corresponding path program 1 times [2023-08-30 02:16:17,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:17,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947049994] [2023-08-30 02:16:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:17,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:17,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947049994] [2023-08-30 02:16:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947049994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:17,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:17,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:16:17,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309401720] [2023-08-30 02:16:17,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:17,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:17,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:17,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 370 [2023-08-30 02:16:17,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:17,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 370 [2023-08-30 02:16:17,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:17,879 INFO L130 PetriNetUnfolder]: 494/911 cut-off events. [2023-08-30 02:16:17,879 INFO L131 PetriNetUnfolder]: For 373/373 co-relation queries the response was YES. [2023-08-30 02:16:17,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 911 events. 494/911 cut-off events. For 373/373 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3300 event pairs, 434 based on Foata normal form. 0/836 useless extension candidates. Maximal degree in co-relation 2081. Up to 758 conditions per place. [2023-08-30 02:16:17,883 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-30 02:16:17,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 397 flow [2023-08-30 02:16:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-30 02:16:17,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657657657657658 [2023-08-30 02:16:17,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-30 02:16:17,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-30 02:16:17,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:17,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-30 02:16:17,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,896 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 285 flow. Second operand 3 states and 628 transitions. [2023-08-30 02:16:17,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 397 flow [2023-08-30 02:16:17,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:16:17,898 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 277 flow [2023-08-30 02:16:17,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-30 02:16:17,899 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2023-08-30 02:16:17,899 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 277 flow [2023-08-30 02:16:17,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:17,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:17,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:17,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:16:17,900 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:17,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:17,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1643925700, now seen corresponding path program 1 times [2023-08-30 02:16:17,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:17,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876746726] [2023-08-30 02:16:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:17,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:18,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:18,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876746726] [2023-08-30 02:16:18,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876746726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:18,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:18,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:16:18,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252714097] [2023-08-30 02:16:18,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:18,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:16:18,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:18,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:16:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:16:18,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 370 [2023-08-30 02:16:18,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:18,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:18,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 370 [2023-08-30 02:16:18,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:18,315 INFO L130 PetriNetUnfolder]: 450/837 cut-off events. [2023-08-30 02:16:18,316 INFO L131 PetriNetUnfolder]: For 350/350 co-relation queries the response was YES. [2023-08-30 02:16:18,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1926 conditions, 837 events. 450/837 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2946 event pairs, 389 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 1918. Up to 690 conditions per place. [2023-08-30 02:16:18,324 INFO L137 encePairwiseOnDemand]: 365/370 looper letters, 51 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-08-30 02:16:18,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 407 flow [2023-08-30 02:16:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:16:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:16:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 811 transitions. [2023-08-30 02:16:18,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547972972972973 [2023-08-30 02:16:18,329 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 811 transitions. [2023-08-30 02:16:18,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 811 transitions. [2023-08-30 02:16:18,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:18,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 811 transitions. [2023-08-30 02:16:18,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:18,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:18,334 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:18,334 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 277 flow. Second operand 4 states and 811 transitions. [2023-08-30 02:16:18,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 407 flow [2023-08-30 02:16:18,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 70 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:18,336 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 277 flow [2023-08-30 02:16:18,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-30 02:16:18,337 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -31 predicate places. [2023-08-30 02:16:18,337 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 277 flow [2023-08-30 02:16:18,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:18,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:18,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:18,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:16:18,338 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:18,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1100241615, now seen corresponding path program 1 times [2023-08-30 02:16:18,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:18,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768940934] [2023-08-30 02:16:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:18,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:19,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:19,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768940934] [2023-08-30 02:16:19,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768940934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:19,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:19,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:16:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433592472] [2023-08-30 02:16:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:19,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:16:19,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:16:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:16:20,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 370 [2023-08-30 02:16:20,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 277 flow. Second operand has 15 states, 15 states have (on average 168.2) internal successors, (2523), 15 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:20,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:20,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 370 [2023-08-30 02:16:20,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:20,546 INFO L130 PetriNetUnfolder]: 460/846 cut-off events. [2023-08-30 02:16:20,547 INFO L131 PetriNetUnfolder]: For 345/345 co-relation queries the response was YES. [2023-08-30 02:16:20,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 846 events. 460/846 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2953 event pairs, 397 based on Foata normal form. 1/796 useless extension candidates. Maximal degree in co-relation 1957. Up to 695 conditions per place. [2023-08-30 02:16:20,550 INFO L137 encePairwiseOnDemand]: 356/370 looper letters, 49 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2023-08-30 02:16:20,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 456 flow [2023-08-30 02:16:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:16:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:16:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1720 transitions. [2023-08-30 02:16:20,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648648648648649 [2023-08-30 02:16:20,554 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1720 transitions. [2023-08-30 02:16:20,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1720 transitions. [2023-08-30 02:16:20,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:20,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1720 transitions. [2023-08-30 02:16:20,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:20,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 370.0) internal successors, (4070), 11 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:20,562 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 370.0) internal successors, (4070), 11 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:20,563 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 277 flow. Second operand 10 states and 1720 transitions. [2023-08-30 02:16:20,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 456 flow [2023-08-30 02:16:20,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 446 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:16:20,565 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 332 flow [2023-08-30 02:16:20,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-08-30 02:16:20,566 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -23 predicate places. [2023-08-30 02:16:20,566 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 332 flow [2023-08-30 02:16:20,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.2) internal successors, (2523), 15 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:20,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:20,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:20,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:16:20,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:20,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash 775004358, now seen corresponding path program 1 times [2023-08-30 02:16:20,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:20,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158059306] [2023-08-30 02:16:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:20,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:21,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158059306] [2023-08-30 02:16:21,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158059306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:21,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:21,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:16:21,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182955020] [2023-08-30 02:16:21,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:21,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:16:21,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:21,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:16:21,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:16:21,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 370 [2023-08-30 02:16:21,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 332 flow. Second operand has 15 states, 15 states have (on average 168.26666666666668) internal successors, (2524), 15 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:21,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:21,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 370 [2023-08-30 02:16:21,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:22,117 INFO L130 PetriNetUnfolder]: 443/828 cut-off events. [2023-08-30 02:16:22,117 INFO L131 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2023-08-30 02:16:22,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 828 events. 443/828 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2924 event pairs, 380 based on Foata normal form. 1/778 useless extension candidates. Maximal degree in co-relation 1935. Up to 667 conditions per place. [2023-08-30 02:16:22,121 INFO L137 encePairwiseOnDemand]: 355/370 looper letters, 47 selfloop transitions, 22 changer transitions 0/78 dead transitions. [2023-08-30 02:16:22,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 522 flow [2023-08-30 02:16:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 02:16:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 02:16:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2052 transitions. [2023-08-30 02:16:22,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46216216216216216 [2023-08-30 02:16:22,126 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2052 transitions. [2023-08-30 02:16:22,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2052 transitions. [2023-08-30 02:16:22,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:22,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2052 transitions. [2023-08-30 02:16:22,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:22,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 370.0) internal successors, (4810), 13 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:22,135 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 370.0) internal successors, (4810), 13 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:22,135 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 332 flow. Second operand 12 states and 2052 transitions. [2023-08-30 02:16:22,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 522 flow [2023-08-30 02:16:22,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 78 transitions, 495 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 02:16:22,139 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 378 flow [2023-08-30 02:16:22,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=378, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2023-08-30 02:16:22,139 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -17 predicate places. [2023-08-30 02:16:22,139 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 378 flow [2023-08-30 02:16:22,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.26666666666668) internal successors, (2524), 15 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:22,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:22,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:22,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:16:22,141 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:22,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1744673250, now seen corresponding path program 1 times [2023-08-30 02:16:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836883784] [2023-08-30 02:16:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:22,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:22,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:22,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836883784] [2023-08-30 02:16:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836883784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:22,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:22,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:16:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234713622] [2023-08-30 02:16:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:22,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:16:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:16:22,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:16:23,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 370 [2023-08-30 02:16:23,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 378 flow. Second operand has 15 states, 15 states have (on average 168.26666666666668) internal successors, (2524), 15 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:23,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:23,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 370 [2023-08-30 02:16:23,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:23,649 INFO L130 PetriNetUnfolder]: 442/826 cut-off events. [2023-08-30 02:16:23,649 INFO L131 PetriNetUnfolder]: For 412/412 co-relation queries the response was YES. [2023-08-30 02:16:23,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1964 conditions, 826 events. 442/826 cut-off events. For 412/412 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2922 event pairs, 379 based on Foata normal form. 1/776 useless extension candidates. Maximal degree in co-relation 1953. Up to 667 conditions per place. [2023-08-30 02:16:23,653 INFO L137 encePairwiseOnDemand]: 356/370 looper letters, 49 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2023-08-30 02:16:23,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 79 transitions, 573 flow [2023-08-30 02:16:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 02:16:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 02:16:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2218 transitions. [2023-08-30 02:16:23,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46112266112266115 [2023-08-30 02:16:23,658 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2218 transitions. [2023-08-30 02:16:23,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2218 transitions. [2023-08-30 02:16:23,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:23,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2218 transitions. [2023-08-30 02:16:23,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 170.6153846153846) internal successors, (2218), 13 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:23,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 370.0) internal successors, (5180), 14 states have internal predecessors, (5180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:23,669 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 370.0) internal successors, (5180), 14 states have internal predecessors, (5180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:23,669 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 378 flow. Second operand 13 states and 2218 transitions. [2023-08-30 02:16:23,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 79 transitions, 573 flow [2023-08-30 02:16:23,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 79 transitions, 538 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 02:16:23,672 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 414 flow [2023-08-30 02:16:23,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=414, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2023-08-30 02:16:23,673 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -12 predicate places. [2023-08-30 02:16:23,673 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 414 flow [2023-08-30 02:16:23,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.26666666666668) internal successors, (2524), 15 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:23,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:23,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:23,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:16:23,674 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:23,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1749704827, now seen corresponding path program 1 times [2023-08-30 02:16:23,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:23,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047131851] [2023-08-30 02:16:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:23,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:24,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:16:24,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047131851] [2023-08-30 02:16:24,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047131851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:24,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:24,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:16:24,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080346556] [2023-08-30 02:16:24,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:24,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:16:24,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:16:24,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:16:24,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:16:24,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 370 [2023-08-30 02:16:24,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 414 flow. Second operand has 15 states, 15 states have (on average 168.26666666666668) internal successors, (2524), 15 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:24,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:24,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 370 [2023-08-30 02:16:24,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:25,088 INFO L130 PetriNetUnfolder]: 442/825 cut-off events. [2023-08-30 02:16:25,088 INFO L131 PetriNetUnfolder]: For 441/441 co-relation queries the response was YES. [2023-08-30 02:16:25,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1973 conditions, 825 events. 442/825 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2913 event pairs, 379 based on Foata normal form. 1/775 useless extension candidates. Maximal degree in co-relation 1960. Up to 667 conditions per place. [2023-08-30 02:16:25,092 INFO L137 encePairwiseOnDemand]: 357/370 looper letters, 44 selfloop transitions, 22 changer transitions 0/75 dead transitions. [2023-08-30 02:16:25,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 75 transitions, 566 flow [2023-08-30 02:16:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 02:16:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 02:16:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2046 transitions. [2023-08-30 02:16:25,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608108108108108 [2023-08-30 02:16:25,097 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2046 transitions. [2023-08-30 02:16:25,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2046 transitions. [2023-08-30 02:16:25,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:25,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2046 transitions. [2023-08-30 02:16:25,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 170.5) internal successors, (2046), 12 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:25,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 370.0) internal successors, (4810), 13 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:25,107 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 370.0) internal successors, (4810), 13 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:25,107 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 414 flow. Second operand 12 states and 2046 transitions. [2023-08-30 02:16:25,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 75 transitions, 566 flow [2023-08-30 02:16:25,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 502 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-08-30 02:16:25,111 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 382 flow [2023-08-30 02:16:25,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=382, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-08-30 02:16:25,111 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -16 predicate places. [2023-08-30 02:16:25,112 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 382 flow [2023-08-30 02:16:25,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.26666666666668) internal successors, (2524), 15 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:25,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:25,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:25,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:16:25,113 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:25,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:25,113 INFO L85 PathProgramCache]: Analyzing trace with hash -408650212, now seen corresponding path program 1 times [2023-08-30 02:16:25,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:16:25,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638053110] [2023-08-30 02:16:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:16:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:16:25,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:16:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:16:25,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:16:25,218 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:16:25,219 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (70 of 71 remaining) [2023-08-30 02:16:25,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 71 remaining) [2023-08-30 02:16:25,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 71 remaining) [2023-08-30 02:16:25,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 71 remaining) [2023-08-30 02:16:25,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 71 remaining) [2023-08-30 02:16:25,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 71 remaining) [2023-08-30 02:16:25,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 71 remaining) [2023-08-30 02:16:25,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 71 remaining) [2023-08-30 02:16:25,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 71 remaining) [2023-08-30 02:16:25,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 71 remaining) [2023-08-30 02:16:25,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 71 remaining) [2023-08-30 02:16:25,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 71 remaining) [2023-08-30 02:16:25,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 71 remaining) [2023-08-30 02:16:25,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 71 remaining) [2023-08-30 02:16:25,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 71 remaining) [2023-08-30 02:16:25,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 71 remaining) [2023-08-30 02:16:25,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 71 remaining) [2023-08-30 02:16:25,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 71 remaining) [2023-08-30 02:16:25,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 71 remaining) [2023-08-30 02:16:25,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 71 remaining) [2023-08-30 02:16:25,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 71 remaining) [2023-08-30 02:16:25,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 71 remaining) [2023-08-30 02:16:25,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 71 remaining) [2023-08-30 02:16:25,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 71 remaining) [2023-08-30 02:16:25,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 71 remaining) [2023-08-30 02:16:25,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (45 of 71 remaining) [2023-08-30 02:16:25,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 71 remaining) [2023-08-30 02:16:25,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 71 remaining) [2023-08-30 02:16:25,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 71 remaining) [2023-08-30 02:16:25,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 71 remaining) [2023-08-30 02:16:25,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 71 remaining) [2023-08-30 02:16:25,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 71 remaining) [2023-08-30 02:16:25,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 71 remaining) [2023-08-30 02:16:25,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 71 remaining) [2023-08-30 02:16:25,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 71 remaining) [2023-08-30 02:16:25,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 71 remaining) [2023-08-30 02:16:25,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (34 of 71 remaining) [2023-08-30 02:16:25,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 71 remaining) [2023-08-30 02:16:25,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 71 remaining) [2023-08-30 02:16:25,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 71 remaining) [2023-08-30 02:16:25,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 71 remaining) [2023-08-30 02:16:25,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 71 remaining) [2023-08-30 02:16:25,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 71 remaining) [2023-08-30 02:16:25,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 71 remaining) [2023-08-30 02:16:25,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 71 remaining) [2023-08-30 02:16:25,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 71 remaining) [2023-08-30 02:16:25,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 71 remaining) [2023-08-30 02:16:25,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 71 remaining) [2023-08-30 02:16:25,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 71 remaining) [2023-08-30 02:16:25,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 71 remaining) [2023-08-30 02:16:25,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 71 remaining) [2023-08-30 02:16:25,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 71 remaining) [2023-08-30 02:16:25,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 71 remaining) [2023-08-30 02:16:25,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 71 remaining) [2023-08-30 02:16:25,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 71 remaining) [2023-08-30 02:16:25,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 71 remaining) [2023-08-30 02:16:25,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 71 remaining) [2023-08-30 02:16:25,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 71 remaining) [2023-08-30 02:16:25,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 71 remaining) [2023-08-30 02:16:25,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 71 remaining) [2023-08-30 02:16:25,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 71 remaining) [2023-08-30 02:16:25,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 71 remaining) [2023-08-30 02:16:25,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 71 remaining) [2023-08-30 02:16:25,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 71 remaining) [2023-08-30 02:16:25,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 71 remaining) [2023-08-30 02:16:25,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 71 remaining) [2023-08-30 02:16:25,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 71 remaining) [2023-08-30 02:16:25,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 71 remaining) [2023-08-30 02:16:25,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 71 remaining) [2023-08-30 02:16:25,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 71 remaining) [2023-08-30 02:16:25,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 71 remaining) [2023-08-30 02:16:25,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:16:25,233 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:25,239 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 02:16:25,239 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 02:16:25,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 02:16:25 BasicIcfg [2023-08-30 02:16:25,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 02:16:25,330 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 02:16:25,330 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 02:16:25,331 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 02:16:25,331 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:15:58" (3/4) ... [2023-08-30 02:16:25,333 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-30 02:16:25,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 02:16:25,334 INFO L158 Benchmark]: Toolchain (without parser) took 28339.41ms. Allocated memory was 71.3MB in the beginning and 3.7GB in the end (delta: 3.6GB). Free memory was 37.0MB in the beginning and 2.0GB in the end (delta: -2.0GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2023-08-30 02:16:25,334 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory is still 29.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:16:25,334 INFO L158 Benchmark]: CACSL2BoogieTranslator took 609.27ms. Allocated memory is still 71.3MB. Free memory was 36.8MB in the beginning and 38.6MB in the end (delta: -1.8MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2023-08-30 02:16:25,335 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.87ms. Allocated memory is still 71.3MB. Free memory was 38.6MB in the beginning and 36.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 02:16:25,335 INFO L158 Benchmark]: Boogie Preprocessor took 22.77ms. Allocated memory is still 71.3MB. Free memory was 36.3MB in the beginning and 34.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 02:16:25,335 INFO L158 Benchmark]: RCFGBuilder took 618.40ms. Allocated memory is still 71.3MB. Free memory was 34.6MB in the beginning and 34.1MB in the end (delta: 422.3kB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. [2023-08-30 02:16:25,336 INFO L158 Benchmark]: TraceAbstraction took 27027.37ms. Allocated memory was 71.3MB in the beginning and 3.7GB in the end (delta: 3.6GB). Free memory was 33.5MB in the beginning and 2.0GB in the end (delta: -2.0GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2023-08-30 02:16:25,336 INFO L158 Benchmark]: Witness Printer took 3.10ms. Allocated memory is still 3.7GB. Free memory is still 2.0GB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:16:25,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory is still 29.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 609.27ms. Allocated memory is still 71.3MB. Free memory was 36.8MB in the beginning and 38.6MB in the end (delta: -1.8MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.87ms. Allocated memory is still 71.3MB. Free memory was 38.6MB in the beginning and 36.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.77ms. Allocated memory is still 71.3MB. Free memory was 36.3MB in the beginning and 34.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 618.40ms. Allocated memory is still 71.3MB. Free memory was 34.6MB in the beginning and 34.1MB in the end (delta: 422.3kB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. * TraceAbstraction took 27027.37ms. Allocated memory was 71.3MB in the beginning and 3.7GB in the end (delta: 3.6GB). Free memory was 33.5MB in the beginning and 2.0GB in the end (delta: -2.0GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. * Witness Printer took 3.10ms. Allocated memory is still 3.7GB. Free memory is still 2.0GB. 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: 3.2s, 172 PlacesBefore, 99 PlacesAfterwards, 159 TransitionsBefore, 85 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 5 FixpointIterations, 39 TrivialSequentialCompositions, 81 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 126 TotalNumberOfCompositions, 6871 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4655, independent: 4410, independent conditional: 0, independent unconditional: 4410, dependent: 245, dependent conditional: 0, dependent unconditional: 245, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1262, independent: 1196, independent conditional: 0, independent unconditional: 1196, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4655, independent: 3214, independent conditional: 0, independent unconditional: 3214, dependent: 179, dependent conditional: 0, dependent unconditional: 179, unknown: 1262, unknown conditional: 0, unknown unconditional: 1262] , Statistics on independence cache: Total cache size (in pairs): 160, Positive cache size: 134, Positive conditional cache size: 0, Positive unconditional cache size: 134, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1159]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1159. Possible FailurePath: [L1124] 0 char *v; [L1161] 0 pthread_t t; [L1162] FCALL, FORK 0 pthread_create(&t, 0, thread0, 0) VAL [arg={0:0}, pthread_create(&t, 0, thread0, 0)=-4, t={6:0}, v={0:0}] [L1146] 1 pthread_t t1, t2, t3, t4, t5; [L1147] FCALL, FORK 1 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=-3, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={0:0}] [L1148] 1 \read(t1) VAL [\read(t1)=-3, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={0:0}] [L1127] 2 v = malloc(sizeof(char)) [L1128] 2 return 0; [L1163] 0 \read(t) VAL [\read(t)=-4, \read(t1)=-3, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, t={6:0}, v={3:0}] [L1148] FCALL, JOIN 2 pthread_join(t1, 0) VAL [\read(t1)=-3, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1149] FCALL, FORK 1 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=-2, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1133] 3 v[0] = 'X' [L1135] 3 return 0; [L1150] FCALL, FORK 1 pthread_create(&t3, 0, thread3, 0) VAL [\result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=-1, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1140] 4 v[0] = 'Y' [L1142] 4 return 0; [L1151] FCALL, FORK 1 pthread_create(&t4, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=0, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1133] 5 v[0] = 'X' [L1135] 5 return 0; [L1152] FCALL, FORK 1 pthread_create(&t5, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=1, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1153] 1 \read(t2) VAL [\read(t2)=-2, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1133] 6 v[0] = 'X' [L1135] 6 return 0; [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [\read(t2)=-2, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1154] 1 \read(t3) VAL [\read(t3)=-1, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [\read(t3)=-1, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1155] 1 \read(t4) VAL [\read(t4)=0, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [\read(t4)=0, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1156] 1 \read(t5) VAL [\read(t5)=1, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [\read(t5)=1, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t2={8:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t3={9:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t4={10:0}, t5={5:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; [L1163] FCALL, JOIN 1 pthread_join(t, 0) VAL [\read(t)=-4, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={6:0}, v={3:0}] [L1164] EXPR 0 v[0] [L1164] CALL 0 __VERIFIER_assert(v[0] == 'X') [L1123] COND FALSE 0 !(!expression) [L1164] RET 0 __VERIFIER_assert(v[0] == 'X') [L1165] 0 return 0; [L1165] 0 return 0; - 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: -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: -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: -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: -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: 1149]: 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: 1150]: 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: 1147]: 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: 1152]: 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: 1151]: 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: -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: -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: -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: 1123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1162]: 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: 1149]: 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: 1151]: 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: 1147]: 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: 1150]: 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: 1152]: 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 11 procedures, 280 locations, 71 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: 26.7s, OverallIterations: 20, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 18.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9104 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6461 mSDsluCounter, 1641 SdHoareTripleChecker+Invalid, 6.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1255 mSDsCounter, 538 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12489 IncrementalHoareTripleChecker+Invalid, 13027 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 538 mSolverCounterUnsat, 386 mSDtfsCounter, 12489 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=414occurred in iteration=18, InterpolantAutomatonStates: 97, 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: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 395 NumberOfCodeBlocks, 395 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 331 ConstructedInterpolants, 0 QuantifiedInterpolants, 5338 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 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 [2023-08-30 02:16:25,380 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/singleton.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 ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 02:16:27,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:16:27,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:16:27,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:16:27,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:16:27,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:16:27,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:16:27,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:16:27,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:16:27,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:16:27,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:16:27,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:16:27,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:16:27,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:16:27,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:16:27,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:16:27,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:16:27,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:16:28,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:16:28,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:16:28,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:16:28,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:16:28,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:16:28,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:16:28,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:16:28,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:16:28,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:16:28,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:16:28,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:16:28,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:16:28,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:16:28,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:16:28,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:16:28,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:16:28,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:16:28,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:16:28,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:16:28,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:16:28,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:16:28,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:16:28,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:16:28,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 02:16:28,077 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:16:28,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:16:28,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:16:28,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:16:28,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:16:28,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:16:28,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:16:28,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:16:28,080 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:16:28,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:16:28,081 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:16:28,082 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:16:28,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:16:28,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:16:28,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:16:28,082 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:16:28,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:16:28,083 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:16:28,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:16:28,083 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:16:28,083 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 02:16:28,083 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 02:16:28,084 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:16:28,084 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:16:28,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:16:28,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:16:28,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:16:28,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:16:28,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:16:28,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:16:28,085 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 02:16:28,086 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 02:16:28,086 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:16:28,086 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:16:28,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:16:28,087 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 02:16:28,087 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:16:28,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:16:28,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:16:28,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:16:28,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:16:28,434 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:16:28,435 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:16:28,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/singleton.i [2023-08-30 02:16:29,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:16:29,950 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:16:29,950 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/singleton.i [2023-08-30 02:16:29,962 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4206beac9/b34b2a135c4b4c2481ec6626308f3768/FLAGc6cbf994e [2023-08-30 02:16:29,976 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4206beac9/b34b2a135c4b4c2481ec6626308f3768 [2023-08-30 02:16:29,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:16:29,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:16:29,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:16:29,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:16:29,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:16:29,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:16:29" (1/1) ... [2023-08-30 02:16:29,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@521ca4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:29, skipping insertion in model container [2023-08-30 02:16:29,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:16:29" (1/1) ... [2023-08-30 02:16:29,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:16:30,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:16:30,209 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 02:16:30,479 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/singleton.i[55547,55560] [2023-08-30 02:16:30,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:16:30,514 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:16:30,542 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 02:16:30,559 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/singleton.i[55547,55560] [2023-08-30 02:16:30,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:16:30,670 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 02:16:30,671 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 02:16:30,671 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 02:16:30,676 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:16:30,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30 WrapperNode [2023-08-30 02:16:30,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:16:30,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:16:30,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:16:30,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:16:30,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,723 INFO L138 Inliner]: procedures = 328, calls = 52, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2023-08-30 02:16:30,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:16:30,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:16:30,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:16:30,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:16:30,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,746 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:16:30,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:16:30,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:16:30,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:16:30,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (1/1) ... [2023-08-30 02:16:30,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:16:30,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:16:30,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 02:16:30,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 02:16:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-08-30 02:16:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 02:16:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 02:16:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:16:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-08-30 02:16:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:16:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 02:16:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 02:16:30,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 02:16:30,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2023-08-30 02:16:30,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2023-08-30 02:16:30,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 02:16:30,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 02:16:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 02:16:30,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 02:16:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 02:16:30,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 02:16:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 02:16:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:16:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:16:30,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:16:30,834 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 02:16:30,940 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:16:30,942 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:16:31,369 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:16:31,375 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:16:31,382 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 02:16:31,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:16:31 BoogieIcfgContainer [2023-08-30 02:16:31,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:16:31,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:16:31,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:16:31,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:16:31,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:16:29" (1/3) ... [2023-08-30 02:16:31,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a51b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:16:31, skipping insertion in model container [2023-08-30 02:16:31,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:16:30" (2/3) ... [2023-08-30 02:16:31,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a51b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:16:31, skipping insertion in model container [2023-08-30 02:16:31,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:16:31" (3/3) ... [2023-08-30 02:16:31,393 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton.i [2023-08-30 02:16:31,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:16:31,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-30 02:16:31,407 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:16:31,590 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2023-08-30 02:16:31,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 243 transitions, 593 flow [2023-08-30 02:16:31,731 INFO L130 PetriNetUnfolder]: 6/164 cut-off events. [2023-08-30 02:16:31,731 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 02:16:31,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 164 events. 6/164 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 172 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2023-08-30 02:16:31,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 243 transitions, 593 flow [2023-08-30 02:16:31,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 160 transitions, 371 flow [2023-08-30 02:16:31,751 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:16:31,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 160 transitions, 371 flow [2023-08-30 02:16:31,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 160 transitions, 371 flow [2023-08-30 02:16:31,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 160 transitions, 371 flow [2023-08-30 02:16:31,791 INFO L130 PetriNetUnfolder]: 6/160 cut-off events. [2023-08-30 02:16:31,791 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 02:16:31,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 160 events. 6/160 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 175 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2023-08-30 02:16:31,794 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-08-30 02:16:39,636 INFO L134 LiptonReduction]: Checked pairs total: 6857 [2023-08-30 02:16:39,637 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-30 02:16:39,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:16:39,664 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;@269b6558, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:16:39,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-08-30 02:16:39,666 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:16:39,666 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:16:39,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:39,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:16:39,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:39,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash 611, now seen corresponding path program 1 times [2023-08-30 02:16:39,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:16:39,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441360802] [2023-08-30 02:16:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:39,683 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 [2023-08-30 02:16:39,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:16:39,697 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) [2023-08-30 02:16:39,778 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 [2023-08-30 02:16:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-30 02:16:39,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:16:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:39,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:16:39,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:16:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441360802] [2023-08-30 02:16:39,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441360802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:39,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:39,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:16:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456397481] [2023-08-30 02:16:39,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:39,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:16:39,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:16:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:16:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:16:39,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 370 [2023-08-30 02:16:39,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 221 flow. Second operand has 2 states, 2 states have (on average 212.5) internal successors, (425), 2 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:39,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:39,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 370 [2023-08-30 02:16:39,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:42,355 INFO L130 PetriNetUnfolder]: 19442/26672 cut-off events. [2023-08-30 02:16:42,355 INFO L131 PetriNetUnfolder]: For 769/769 co-relation queries the response was YES. [2023-08-30 02:16:42,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53375 conditions, 26672 events. 19442/26672 cut-off events. For 769/769 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145258 event pairs, 19098 based on Foata normal form. 0/9489 useless extension candidates. Maximal degree in co-relation 53350. Up to 25317 conditions per place. [2023-08-30 02:16:42,565 INFO L137 encePairwiseOnDemand]: 368/370 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2023-08-30 02:16:42,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2023-08-30 02:16:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:16:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:16:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 491 transitions. [2023-08-30 02:16:42,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6635135135135135 [2023-08-30 02:16:42,587 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 491 transitions. [2023-08-30 02:16:42,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 491 transitions. [2023-08-30 02:16:42,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:42,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 491 transitions. [2023-08-30 02:16:42,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 245.5) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:42,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:42,605 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:42,606 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 221 flow. Second operand 2 states and 491 transitions. [2023-08-30 02:16:42,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2023-08-30 02:16:42,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-30 02:16:42,623 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2023-08-30 02:16:42,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-08-30 02:16:42,627 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2023-08-30 02:16:42,627 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2023-08-30 02:16:42,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 212.5) internal successors, (425), 2 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:42,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:42,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:16:42,648 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 [2023-08-30 02:16:42,836 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 [2023-08-30 02:16:42,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:42,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash 599893, now seen corresponding path program 1 times [2023-08-30 02:16:42,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:16:42,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916789907] [2023-08-30 02:16:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:42,845 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 [2023-08-30 02:16:42,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:16:42,847 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) [2023-08-30 02:16:42,849 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 [2023-08-30 02:16:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:42,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:16:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:16:42,952 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 02:16:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:42,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:16:42,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:16:42,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916789907] [2023-08-30 02:16:42,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916789907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:42,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:42,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:16:42,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155203804] [2023-08-30 02:16:42,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:42,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:42,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:16:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:43,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 370 [2023-08-30 02:16:43,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:43,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:43,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 370 [2023-08-30 02:16:43,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:45,080 INFO L130 PetriNetUnfolder]: 19430/26651 cut-off events. [2023-08-30 02:16:45,080 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-08-30 02:16:45,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52293 conditions, 26651 events. 19430/26651 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145199 event pairs, 16158 based on Foata normal form. 0/9483 useless extension candidates. Maximal degree in co-relation 52290. Up to 25252 conditions per place. [2023-08-30 02:16:45,216 INFO L137 encePairwiseOnDemand]: 367/370 looper letters, 68 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-30 02:16:45,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 333 flow [2023-08-30 02:16:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 689 transitions. [2023-08-30 02:16:45,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6207207207207207 [2023-08-30 02:16:45,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 689 transitions. [2023-08-30 02:16:45,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 689 transitions. [2023-08-30 02:16:45,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:45,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 689 transitions. [2023-08-30 02:16:45,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:45,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:45,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:45,224 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 689 transitions. [2023-08-30 02:16:45,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 333 flow [2023-08-30 02:16:45,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:16:45,226 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 191 flow [2023-08-30 02:16:45,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2023-08-30 02:16:45,227 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2023-08-30 02:16:45,227 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 191 flow [2023-08-30 02:16:45,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:45,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:45,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:16:45,240 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 [2023-08-30 02:16:45,436 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 [2023-08-30 02:16:45,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:45,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:45,437 INFO L85 PathProgramCache]: Analyzing trace with hash 599892, now seen corresponding path program 1 times [2023-08-30 02:16:45,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:16:45,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69967205] [2023-08-30 02:16:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:45,438 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 [2023-08-30 02:16:45,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:16:45,453 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) [2023-08-30 02:16:45,495 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 [2023-08-30 02:16:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:45,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:16:45,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:16:45,531 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:16:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:45,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:16:45,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:16:45,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69967205] [2023-08-30 02:16:45,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69967205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:45,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:45,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:16:45,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793182960] [2023-08-30 02:16:45,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:45,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:45,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:16:45,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:45,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 370 [2023-08-30 02:16:45,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:45,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:45,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 370 [2023-08-30 02:16:45,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:47,333 INFO L130 PetriNetUnfolder]: 14207/19637 cut-off events. [2023-08-30 02:16:47,333 INFO L131 PetriNetUnfolder]: For 1525/1525 co-relation queries the response was YES. [2023-08-30 02:16:47,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39994 conditions, 19637 events. 14207/19637 cut-off events. For 1525/1525 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104183 event pairs, 13939 based on Foata normal form. 0/8948 useless extension candidates. Maximal degree in co-relation 39989. Up to 18580 conditions per place. [2023-08-30 02:16:47,443 INFO L137 encePairwiseOnDemand]: 361/370 looper letters, 68 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-08-30 02:16:47,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 368 flow [2023-08-30 02:16:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-30 02:16:47,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5936936936936937 [2023-08-30 02:16:47,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-30 02:16:47,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-30 02:16:47,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:47,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-30 02:16:47,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:47,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:47,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:47,450 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 191 flow. Second operand 3 states and 659 transitions. [2023-08-30 02:16:47,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 368 flow [2023-08-30 02:16:47,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:47,456 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 245 flow [2023-08-30 02:16:47,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-08-30 02:16:47,458 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -8 predicate places. [2023-08-30 02:16:47,458 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 245 flow [2023-08-30 02:16:47,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:47,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:47,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:47,468 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 [2023-08-30 02:16:47,668 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 [2023-08-30 02:16:47,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:47,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:47,669 INFO L85 PathProgramCache]: Analyzing trace with hash -83049567, now seen corresponding path program 1 times [2023-08-30 02:16:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:16:47,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270910852] [2023-08-30 02:16:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:47,669 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 [2023-08-30 02:16:47,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:16:47,674 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) [2023-08-30 02:16:47,676 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 [2023-08-30 02:16:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:47,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 02:16:47,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:16:47,768 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:16:47,800 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:47,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:47,829 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:47,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:47,857 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:47,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:47,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:16:47,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:16:47,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270910852] [2023-08-30 02:16:47,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270910852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:16:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477593056] [2023-08-30 02:16:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:47,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:16:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:48,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 370 [2023-08-30 02:16:48,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:48,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:48,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 370 [2023-08-30 02:16:48,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:49,500 INFO L130 PetriNetUnfolder]: 14202/19629 cut-off events. [2023-08-30 02:16:49,500 INFO L131 PetriNetUnfolder]: For 2991/2991 co-relation queries the response was YES. [2023-08-30 02:16:49,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41475 conditions, 19629 events. 14202/19629 cut-off events. For 2991/2991 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104131 event pairs, 12475 based on Foata normal form. 0/8956 useless extension candidates. Maximal degree in co-relation 41469. Up to 18558 conditions per place. [2023-08-30 02:16:49,605 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 70 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-30 02:16:49,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 393 flow [2023-08-30 02:16:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:49,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2023-08-30 02:16:49,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882882882882883 [2023-08-30 02:16:49,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2023-08-30 02:16:49,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2023-08-30 02:16:49,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:49,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2023-08-30 02:16:49,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:49,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:49,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:49,614 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 245 flow. Second operand 3 states and 653 transitions. [2023-08-30 02:16:49,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 393 flow [2023-08-30 02:16:49,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:49,621 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 229 flow [2023-08-30 02:16:49,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2023-08-30 02:16:49,623 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2023-08-30 02:16:49,623 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 229 flow [2023-08-30 02:16:49,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:49,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:49,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:49,637 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 [2023-08-30 02:16:49,837 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 [2023-08-30 02:16:49,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:49,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:49,838 INFO L85 PathProgramCache]: Analyzing trace with hash -83049566, now seen corresponding path program 1 times [2023-08-30 02:16:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:16:49,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123086934] [2023-08-30 02:16:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:49,842 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 [2023-08-30 02:16:49,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:16:49,843 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) [2023-08-30 02:16:49,846 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 [2023-08-30 02:16:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:49,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 02:16:49,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:16:49,959 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 02:16:49,965 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:16:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:50,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:50,047 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:50,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:50,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:50,184 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:16:50,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:16:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:50,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:50,358 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2023-08-30 02:16:50,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2023-08-30 02:16:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:50,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:16:50,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:16:50,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123086934] [2023-08-30 02:16:50,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123086934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:50,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:50,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 02:16:50,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310363259] [2023-08-30 02:16:50,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:50,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:16:50,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:16:50,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:16:50,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:16:51,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 370 [2023-08-30 02:16:51,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 184.16666666666666) internal successors, (1105), 6 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:51,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:51,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 370 [2023-08-30 02:16:51,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:53,427 INFO L130 PetriNetUnfolder]: 14199/19619 cut-off events. [2023-08-30 02:16:53,427 INFO L131 PetriNetUnfolder]: For 2987/2987 co-relation queries the response was YES. [2023-08-30 02:16:53,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41449 conditions, 19619 events. 14199/19619 cut-off events. For 2987/2987 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104128 event pairs, 12468 based on Foata normal form. 0/8948 useless extension candidates. Maximal degree in co-relation 41443. Up to 18548 conditions per place. [2023-08-30 02:16:53,574 INFO L137 encePairwiseOnDemand]: 363/370 looper letters, 72 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2023-08-30 02:16:53,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 409 flow [2023-08-30 02:16:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:16:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:16:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1172 transitions. [2023-08-30 02:16:53,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527927927927928 [2023-08-30 02:16:53,579 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1172 transitions. [2023-08-30 02:16:53,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1172 transitions. [2023-08-30 02:16:53,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:53,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1172 transitions. [2023-08-30 02:16:53,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:53,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:53,585 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:53,585 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 229 flow. Second operand 6 states and 1172 transitions. [2023-08-30 02:16:53,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 409 flow [2023-08-30 02:16:53,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:53,591 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 233 flow [2023-08-30 02:16:53,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2023-08-30 02:16:53,594 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2023-08-30 02:16:53,594 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 233 flow [2023-08-30 02:16:53,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 184.16666666666666) internal successors, (1105), 6 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:53,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:53,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:53,619 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 [2023-08-30 02:16:53,801 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 [2023-08-30 02:16:53,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:53,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1474912626, now seen corresponding path program 1 times [2023-08-30 02:16:53,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:16:53,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940086954] [2023-08-30 02:16:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:53,803 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 [2023-08-30 02:16:53,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:16:53,806 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) [2023-08-30 02:16:53,808 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 [2023-08-30 02:16:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:53,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 02:16:53,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:16:53,941 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 02:16:53,948 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:16:54,015 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:54,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:54,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:54,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:54,084 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:54,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:54,132 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:54,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:54,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:54,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:54,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:54,195 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:54,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:54,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:54,226 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 02:16:54,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 02:16:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:54,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:54,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:16:54,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:16:54,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940086954] [2023-08-30 02:16:54,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940086954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:54,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:54,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:16:54,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928802807] [2023-08-30 02:16:54,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:54,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:16:54,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:16:54,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:16:54,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:16:55,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 370 [2023-08-30 02:16:55,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:55,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:55,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 370 [2023-08-30 02:16:55,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:56,623 INFO L130 PetriNetUnfolder]: 8982/12608 cut-off events. [2023-08-30 02:16:56,623 INFO L131 PetriNetUnfolder]: For 2960/2960 co-relation queries the response was YES. [2023-08-30 02:16:56,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26214 conditions, 12608 events. 8982/12608 cut-off events. For 2960/2960 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 64812 event pairs, 8805 based on Foata normal form. 1456/6947 useless extension candidates. Maximal degree in co-relation 26208. Up to 11895 conditions per place. [2023-08-30 02:16:56,681 INFO L137 encePairwiseOnDemand]: 361/370 looper letters, 61 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2023-08-30 02:16:56,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 378 flow [2023-08-30 02:16:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:16:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:16:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 836 transitions. [2023-08-30 02:16:56,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5648648648648649 [2023-08-30 02:16:56,685 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 836 transitions. [2023-08-30 02:16:56,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 836 transitions. [2023-08-30 02:16:56,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:56,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 836 transitions. [2023-08-30 02:16:56,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:56,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:56,691 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:56,691 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 233 flow. Second operand 4 states and 836 transitions. [2023-08-30 02:16:56,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 378 flow [2023-08-30 02:16:56,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 364 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 02:16:56,693 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 233 flow [2023-08-30 02:16:56,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2023-08-30 02:16:56,694 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2023-08-30 02:16:56,694 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 233 flow [2023-08-30 02:16:56,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:56,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:56,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:56,705 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 [2023-08-30 02:16:56,905 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 [2023-08-30 02:16:56,906 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:56,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:56,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1595754247, now seen corresponding path program 1 times [2023-08-30 02:16:56,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:16:56,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656164212] [2023-08-30 02:16:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:56,907 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 [2023-08-30 02:16:56,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:16:56,908 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) [2023-08-30 02:16:56,910 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 [2023-08-30 02:16:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:57,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 02:16:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:16:57,013 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:16:57,034 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:57,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:57,053 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:57,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:57,071 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:57,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:57,090 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 02:16:57,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 02:16:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:57,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:16:57,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:16:57,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656164212] [2023-08-30 02:16:57,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656164212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:57,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:57,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:16:57,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171814326] [2023-08-30 02:16:57,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:57,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:16:57,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:16:57,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:16:57,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:16:57,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 370 [2023-08-30 02:16:57,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:57,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:57,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 370 [2023-08-30 02:16:57,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:58,027 INFO L130 PetriNetUnfolder]: 7190/10302 cut-off events. [2023-08-30 02:16:58,027 INFO L131 PetriNetUnfolder]: For 1253/1253 co-relation queries the response was YES. [2023-08-30 02:16:58,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21345 conditions, 10302 events. 7190/10302 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 52739 event pairs, 5815 based on Foata normal form. 0/4728 useless extension candidates. Maximal degree in co-relation 21340. Up to 9576 conditions per place. [2023-08-30 02:16:58,069 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 64 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 02:16:58,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 365 flow [2023-08-30 02:16:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:16:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:16:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2023-08-30 02:16:58,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5828828828828829 [2023-08-30 02:16:58,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2023-08-30 02:16:58,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2023-08-30 02:16:58,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:58,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2023-08-30 02:16:58,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:58,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:58,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:58,094 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 233 flow. Second operand 3 states and 647 transitions. [2023-08-30 02:16:58,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 365 flow [2023-08-30 02:16:58,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 83 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:58,105 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 222 flow [2023-08-30 02:16:58,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2023-08-30 02:16:58,106 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -15 predicate places. [2023-08-30 02:16:58,106 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 222 flow [2023-08-30 02:16:58,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:58,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:58,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:58,124 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 [2023-08-30 02:16:58,317 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 [2023-08-30 02:16:58,317 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:16:58,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:16:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1595754248, now seen corresponding path program 1 times [2023-08-30 02:16:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:16:58,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956373268] [2023-08-30 02:16:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:16:58,318 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 [2023-08-30 02:16:58,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:16:58,319 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) [2023-08-30 02:16:58,322 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 [2023-08-30 02:16:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:16:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 02:16:58,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:16:58,425 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:16:58,431 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 02:16:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:58,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:58,477 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:58,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:58,515 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:16:58,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:16:58,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:58,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:58,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:58,551 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 02:16:58,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 02:16:58,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:16:58,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:16:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:16:58,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:16:58,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:16:58,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956373268] [2023-08-30 02:16:58,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956373268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:16:58,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:16:58,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 02:16:58,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125437443] [2023-08-30 02:16:58,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:16:58,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:16:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:16:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:16:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:16:59,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 370 [2023-08-30 02:16:59,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:59,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:59,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 370 [2023-08-30 02:16:59,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:16:59,759 INFO L130 PetriNetUnfolder]: 5397/7995 cut-off events. [2023-08-30 02:16:59,759 INFO L131 PetriNetUnfolder]: For 995/995 co-relation queries the response was YES. [2023-08-30 02:16:59,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16470 conditions, 7995 events. 5397/7995 cut-off events. For 995/995 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 41564 event pairs, 4276 based on Foata normal form. 0/3959 useless extension candidates. Maximal degree in co-relation 16465. Up to 7269 conditions per place. [2023-08-30 02:16:59,782 INFO L137 encePairwiseOnDemand]: 364/370 looper letters, 61 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-08-30 02:16:59,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 363 flow [2023-08-30 02:16:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:16:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:16:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1017 transitions. [2023-08-30 02:16:59,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497297297297298 [2023-08-30 02:16:59,790 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1017 transitions. [2023-08-30 02:16:59,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1017 transitions. [2023-08-30 02:16:59,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:16:59,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1017 transitions. [2023-08-30 02:16:59,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:59,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:59,795 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:59,795 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 222 flow. Second operand 5 states and 1017 transitions. [2023-08-30 02:16:59,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 363 flow [2023-08-30 02:16:59,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 83 transitions, 359 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:16:59,798 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 224 flow [2023-08-30 02:16:59,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-08-30 02:16:59,799 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -15 predicate places. [2023-08-30 02:16:59,799 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 224 flow [2023-08-30 02:16:59,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:16:59,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:16:59,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:16:59,808 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 (9)] Ended with exit code 0 [2023-08-30 02:17:00,006 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 [2023-08-30 02:17:00,007 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:00,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash 216519625, now seen corresponding path program 1 times [2023-08-30 02:17:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:00,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117435106] [2023-08-30 02:17:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:00,008 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 [2023-08-30 02:17:00,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:00,011 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) [2023-08-30 02:17:00,012 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 [2023-08-30 02:17:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:00,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 02:17:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:00,108 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:00,123 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:17:00,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:17:00,138 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:17:00,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:17:00,151 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 02:17:00,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 02:17:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:00,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:00,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:00,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117435106] [2023-08-30 02:17:00,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117435106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:00,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:00,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:17:00,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291406828] [2023-08-30 02:17:00,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:00,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:17:00,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:17:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:17:00,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 370 [2023-08-30 02:17:00,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:00,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:00,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 370 [2023-08-30 02:17:00,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:00,775 INFO L130 PetriNetUnfolder]: 5739/8201 cut-off events. [2023-08-30 02:17:00,775 INFO L131 PetriNetUnfolder]: For 1024/1024 co-relation queries the response was YES. [2023-08-30 02:17:00,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17203 conditions, 8201 events. 5739/8201 cut-off events. For 1024/1024 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39723 event pairs, 4561 based on Foata normal form. 0/4241 useless extension candidates. Maximal degree in co-relation 17198. Up to 7731 conditions per place. [2023-08-30 02:17:00,816 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 62 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-30 02:17:00,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 352 flow [2023-08-30 02:17:00,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:17:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:17:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-30 02:17:00,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581081081081081 [2023-08-30 02:17:00,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-30 02:17:00,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-30 02:17:00,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:00,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-30 02:17:00,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:00,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:00,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:00,822 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 224 flow. Second operand 3 states and 645 transitions. [2023-08-30 02:17:00,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 352 flow [2023-08-30 02:17:00,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 342 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:17:00,825 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 214 flow [2023-08-30 02:17:00,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-08-30 02:17:00,826 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -19 predicate places. [2023-08-30 02:17:00,826 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 214 flow [2023-08-30 02:17:00,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:00,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:00,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:00,838 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 [2023-08-30 02:17:01,038 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 [2023-08-30 02:17:01,038 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:01,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash 216519626, now seen corresponding path program 1 times [2023-08-30 02:17:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:01,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004996154] [2023-08-30 02:17:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:01,040 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 [2023-08-30 02:17:01,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:01,041 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) [2023-08-30 02:17:01,053 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 [2023-08-30 02:17:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:01,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 02:17:01,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:01,181 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:01,185 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 02:17:01,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:01,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:17:01,253 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:17:01,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:17:01,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:01,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:17:01,321 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-30 02:17:01,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 02:17:01,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:01,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:17:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:01,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:01,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:01,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004996154] [2023-08-30 02:17:01,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004996154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:01,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:01,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 02:17:01,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190275551] [2023-08-30 02:17:01,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:01,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:17:01,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:17:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:17:02,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 370 [2023-08-30 02:17:02,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:02,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:02,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 370 [2023-08-30 02:17:02,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:03,309 INFO L130 PetriNetUnfolder]: 5731/8057 cut-off events. [2023-08-30 02:17:03,310 INFO L131 PetriNetUnfolder]: For 1021/1021 co-relation queries the response was YES. [2023-08-30 02:17:03,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17040 conditions, 8057 events. 5731/8057 cut-off events. For 1021/1021 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 37592 event pairs, 4552 based on Foata normal form. 0/4109 useless extension candidates. Maximal degree in co-relation 17035. Up to 7701 conditions per place. [2023-08-30 02:17:03,345 INFO L137 encePairwiseOnDemand]: 363/370 looper letters, 64 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2023-08-30 02:17:03,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 373 flow [2023-08-30 02:17:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:17:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:17:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1164 transitions. [2023-08-30 02:17:03,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243243243243243 [2023-08-30 02:17:03,349 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1164 transitions. [2023-08-30 02:17:03,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1164 transitions. [2023-08-30 02:17:03,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:03,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1164 transitions. [2023-08-30 02:17:03,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:03,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:03,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:03,374 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 214 flow. Second operand 6 states and 1164 transitions. [2023-08-30 02:17:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 373 flow [2023-08-30 02:17:03,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 369 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:17:03,394 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 218 flow [2023-08-30 02:17:03,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2023-08-30 02:17:03,395 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -18 predicate places. [2023-08-30 02:17:03,395 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 218 flow [2023-08-30 02:17:03,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:03,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:03,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:03,405 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 [2023-08-30 02:17:03,596 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 [2023-08-30 02:17:03,596 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:03,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash 216519583, now seen corresponding path program 1 times [2023-08-30 02:17:03,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:03,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675082041] [2023-08-30 02:17:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:03,597 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 [2023-08-30 02:17:03,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:03,598 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) [2023-08-30 02:17:03,603 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 [2023-08-30 02:17:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:17:03,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:03,722 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 02:17:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:03,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:03,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:03,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675082041] [2023-08-30 02:17:03,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675082041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:03,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:03,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:17:03,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108270796] [2023-08-30 02:17:03,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:03,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:17:03,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:17:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:17:03,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 370 [2023-08-30 02:17:03,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:03,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:03,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 370 [2023-08-30 02:17:03,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:04,121 INFO L130 PetriNetUnfolder]: 1832/2798 cut-off events. [2023-08-30 02:17:04,121 INFO L131 PetriNetUnfolder]: For 403/403 co-relation queries the response was YES. [2023-08-30 02:17:04,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5889 conditions, 2798 events. 1832/2798 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11889 event pairs, 1387 based on Foata normal form. 0/1754 useless extension candidates. Maximal degree in co-relation 5884. Up to 2564 conditions per place. [2023-08-30 02:17:04,130 INFO L137 encePairwiseOnDemand]: 364/370 looper letters, 59 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-08-30 02:17:04,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 334 flow [2023-08-30 02:17:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:17:04,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:17:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2023-08-30 02:17:04,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590990990990991 [2023-08-30 02:17:04,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2023-08-30 02:17:04,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2023-08-30 02:17:04,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:04,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2023-08-30 02:17:04,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:04,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:04,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:04,135 INFO L175 Difference]: Start difference. First operand has 81 places, 76 transitions, 218 flow. Second operand 3 states and 656 transitions. [2023-08-30 02:17:04,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 334 flow [2023-08-30 02:17:04,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 73 transitions, 322 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 02:17:04,137 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 198 flow [2023-08-30 02:17:04,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-08-30 02:17:04,137 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -26 predicate places. [2023-08-30 02:17:04,138 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 198 flow [2023-08-30 02:17:04,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:04,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:04,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:04,145 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 (12)] Ended with exit code 0 [2023-08-30 02:17:04,344 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 [2023-08-30 02:17:04,345 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:04,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:04,345 INFO L85 PathProgramCache]: Analyzing trace with hash 216519582, now seen corresponding path program 1 times [2023-08-30 02:17:04,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:04,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651502584] [2023-08-30 02:17:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:04,346 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 [2023-08-30 02:17:04,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:04,347 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) [2023-08-30 02:17:04,349 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 [2023-08-30 02:17:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:04,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:17:04,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:04,427 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:04,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:04,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:04,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651502584] [2023-08-30 02:17:04,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651502584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:04,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:04,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:17:04,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489469222] [2023-08-30 02:17:04,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:04,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:17:04,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:04,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:17:04,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:17:04,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 370 [2023-08-30 02:17:04,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:04,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:04,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 370 [2023-08-30 02:17:04,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:04,709 INFO L130 PetriNetUnfolder]: 414/750 cut-off events. [2023-08-30 02:17:04,710 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-08-30 02:17:04,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 750 events. 414/750 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2468 event pairs, 272 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 1590. Up to 609 conditions per place. [2023-08-30 02:17:04,712 INFO L137 encePairwiseOnDemand]: 363/370 looper letters, 50 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-30 02:17:04,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 302 flow [2023-08-30 02:17:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:17:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:17:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2023-08-30 02:17:04,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567567567567567 [2023-08-30 02:17:04,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2023-08-30 02:17:04,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2023-08-30 02:17:04,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:04,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2023-08-30 02:17:04,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:04,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:04,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:04,718 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 198 flow. Second operand 3 states and 618 transitions. [2023-08-30 02:17:04,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 302 flow [2023-08-30 02:17:04,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:17:04,723 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 195 flow [2023-08-30 02:17:04,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2023-08-30 02:17:04,724 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -29 predicate places. [2023-08-30 02:17:04,724 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 195 flow [2023-08-30 02:17:04,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:04,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:04,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:04,731 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 (13)] Ended with exit code 0 [2023-08-30 02:17:04,931 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 [2023-08-30 02:17:04,932 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:04,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1916942413, now seen corresponding path program 1 times [2023-08-30 02:17:04,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:04,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151776629] [2023-08-30 02:17:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:04,933 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 [2023-08-30 02:17:04,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:04,934 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) [2023-08-30 02:17:04,936 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 [2023-08-30 02:17:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 02:17:05,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:05,096 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 02:17:05,102 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:05,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:05,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:17:05,153 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 02:17:05,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 02:17:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:05,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:17:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:05,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:05,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:05,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151776629] [2023-08-30 02:17:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151776629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:05,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 02:17:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230423626] [2023-08-30 02:17:05,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:17:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:17:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:17:05,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 370 [2023-08-30 02:17:05,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:05,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:05,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 370 [2023-08-30 02:17:05,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:06,267 INFO L130 PetriNetUnfolder]: 403/707 cut-off events. [2023-08-30 02:17:06,267 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-08-30 02:17:06,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1540 conditions, 707 events. 403/707 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2182 event pairs, 260 based on Foata normal form. 0/635 useless extension candidates. Maximal degree in co-relation 1535. Up to 587 conditions per place. [2023-08-30 02:17:06,270 INFO L137 encePairwiseOnDemand]: 362/370 looper letters, 51 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-30 02:17:06,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 68 transitions, 318 flow [2023-08-30 02:17:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:17:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:17:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1004 transitions. [2023-08-30 02:17:06,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427027027027027 [2023-08-30 02:17:06,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1004 transitions. [2023-08-30 02:17:06,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1004 transitions. [2023-08-30 02:17:06,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:06,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1004 transitions. [2023-08-30 02:17:06,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.8) internal successors, (1004), 5 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) [2023-08-30 02:17:06,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:06,280 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:06,280 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 195 flow. Second operand 5 states and 1004 transitions. [2023-08-30 02:17:06,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 68 transitions, 318 flow [2023-08-30 02:17:06,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:17:06,283 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 191 flow [2023-08-30 02:17:06,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-08-30 02:17:06,284 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -31 predicate places. [2023-08-30 02:17:06,284 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 191 flow [2023-08-30 02:17:06,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:06,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:06,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:06,298 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 [2023-08-30 02:17:06,495 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 [2023-08-30 02:17:06,496 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:06,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash -359295160, now seen corresponding path program 1 times [2023-08-30 02:17:06,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:06,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031130394] [2023-08-30 02:17:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:06,497 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 [2023-08-30 02:17:06,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:06,498 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) [2023-08-30 02:17:06,502 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 [2023-08-30 02:17:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:06,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 02:17:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:06,634 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:06,638 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 02:17:06,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:06,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 02:17:06,676 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 02:17:06,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 02:17:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:06,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:06,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:06,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031130394] [2023-08-30 02:17:06,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031130394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:06,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:06,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:17:06,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108579565] [2023-08-30 02:17:06,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:06,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:17:06,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:17:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:17:07,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 370 [2023-08-30 02:17:07,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:07,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:07,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 370 [2023-08-30 02:17:07,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:07,129 INFO L130 PetriNetUnfolder]: 330/594 cut-off events. [2023-08-30 02:17:07,129 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 02:17:07,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 594 events. 330/594 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1723 event pairs, 208 based on Foata normal form. 0/560 useless extension candidates. Maximal degree in co-relation 1296. Up to 488 conditions per place. [2023-08-30 02:17:07,131 INFO L137 encePairwiseOnDemand]: 363/370 looper letters, 47 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-30 02:17:07,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 298 flow [2023-08-30 02:17:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:17:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:17:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 817 transitions. [2023-08-30 02:17:07,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.552027027027027 [2023-08-30 02:17:07,135 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 817 transitions. [2023-08-30 02:17:07,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 817 transitions. [2023-08-30 02:17:07,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:07,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 817 transitions. [2023-08-30 02:17:07,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:07,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:07,138 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:07,139 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 191 flow. Second operand 4 states and 817 transitions. [2023-08-30 02:17:07,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 298 flow [2023-08-30 02:17:07,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 288 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:17:07,140 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 181 flow [2023-08-30 02:17:07,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-08-30 02:17:07,140 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -36 predicate places. [2023-08-30 02:17:07,141 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 181 flow [2023-08-30 02:17:07,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:07,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:07,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:07,153 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 [2023-08-30 02:17:07,348 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 [2023-08-30 02:17:07,348 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:07,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:07,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1215556931, now seen corresponding path program 1 times [2023-08-30 02:17:07,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:07,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260750435] [2023-08-30 02:17:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:07,350 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 [2023-08-30 02:17:07,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:07,351 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) [2023-08-30 02:17:07,353 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 [2023-08-30 02:17:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:07,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 02:17:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:07,547 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:07,575 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:17:07,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:17:07,623 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:07,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:07,666 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:07,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:07,707 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:07,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:07,774 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:07,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:07,842 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 02:17:07,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 02:17:08,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2023-08-30 02:17:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:08,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:08,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:08,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260750435] [2023-08-30 02:17:08,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260750435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:08,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:08,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 02:17:08,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135405259] [2023-08-30 02:17:08,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:08,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:17:08,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:08,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:17:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:17:09,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 370 [2023-08-30 02:17:09,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 194.5) internal successors, (1167), 6 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:09,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:09,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 370 [2023-08-30 02:17:09,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:10,134 INFO L130 PetriNetUnfolder]: 325/588 cut-off events. [2023-08-30 02:17:10,134 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 02:17:10,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 588 events. 325/588 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1714 event pairs, 205 based on Foata normal form. 1/555 useless extension candidates. Maximal degree in co-relation 1272. Up to 483 conditions per place. [2023-08-30 02:17:10,136 INFO L137 encePairwiseOnDemand]: 365/370 looper letters, 44 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2023-08-30 02:17:10,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 288 flow [2023-08-30 02:17:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:17:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:17:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 804 transitions. [2023-08-30 02:17:10,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432432432432432 [2023-08-30 02:17:10,139 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 804 transitions. [2023-08-30 02:17:10,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 804 transitions. [2023-08-30 02:17:10,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:10,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 804 transitions. [2023-08-30 02:17:10,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:10,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:10,145 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:10,145 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 181 flow. Second operand 4 states and 804 transitions. [2023-08-30 02:17:10,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 288 flow [2023-08-30 02:17:10,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 280 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:17:10,147 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 190 flow [2023-08-30 02:17:10,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-30 02:17:10,148 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -35 predicate places. [2023-08-30 02:17:10,148 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 190 flow [2023-08-30 02:17:10,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.5) internal successors, (1167), 6 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:10,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:10,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:10,175 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 (16)] Forceful destruction successful, exit code 0 [2023-08-30 02:17:10,359 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 [2023-08-30 02:17:10,360 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:10,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash 972438923, now seen corresponding path program 1 times [2023-08-30 02:17:10,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:10,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290691654] [2023-08-30 02:17:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:10,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:17:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:10,363 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) [2023-08-30 02:17:10,369 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 [2023-08-30 02:17:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:10,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 02:17:10,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:10,615 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:10,667 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:17:10,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:17:10,740 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:10,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:10,831 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:10,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:10,895 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:10,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:10,988 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:10,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:11,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:11,121 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 02:17:11,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 02:17:12,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2023-08-30 02:17:12,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 02:17:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:12,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:12,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:12,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290691654] [2023-08-30 02:17:12,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290691654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:12,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:12,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:17:12,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040561189] [2023-08-30 02:17:12,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:12,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 02:17:12,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 02:17:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 02:17:14,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 370 [2023-08-30 02:17:14,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 190 flow. Second operand has 8 states, 8 states have (on average 189.625) internal successors, (1517), 8 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:14,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:14,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 370 [2023-08-30 02:17:14,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:15,197 INFO L130 PetriNetUnfolder]: 325/587 cut-off events. [2023-08-30 02:17:15,198 INFO L131 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2023-08-30 02:17:15,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 587 events. 325/587 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1707 event pairs, 204 based on Foata normal form. 1/554 useless extension candidates. Maximal degree in co-relation 1279. Up to 483 conditions per place. [2023-08-30 02:17:15,200 INFO L137 encePairwiseOnDemand]: 364/370 looper letters, 45 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-30 02:17:15,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 305 flow [2023-08-30 02:17:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:17:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:17:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-08-30 02:17:15,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238738738738739 [2023-08-30 02:17:15,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-08-30 02:17:15,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-08-30 02:17:15,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:15,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-08-30 02:17:15,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:15,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:15,211 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:15,211 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 190 flow. Second operand 6 states and 1163 transitions. [2023-08-30 02:17:15,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 305 flow [2023-08-30 02:17:15,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 295 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:17:15,213 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 197 flow [2023-08-30 02:17:15,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2023-08-30 02:17:15,214 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -32 predicate places. [2023-08-30 02:17:15,215 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 197 flow [2023-08-30 02:17:15,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.625) internal successors, (1517), 8 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:15,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:15,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:15,229 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 [2023-08-30 02:17:15,429 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 [2023-08-30 02:17:15,430 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:15,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash 80833940, now seen corresponding path program 1 times [2023-08-30 02:17:15,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:15,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087168982] [2023-08-30 02:17:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:15,431 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 [2023-08-30 02:17:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:15,433 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) [2023-08-30 02:17:15,435 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 [2023-08-30 02:17:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 02:17:15,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:15,672 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:15,726 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:17:15,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:17:15,793 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:15,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:15,922 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-30 02:17:15,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-30 02:17:16,104 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-30 02:17:16,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-30 02:17:16,226 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-30 02:17:16,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-30 02:17:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:16,568 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-30 02:17:16,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 02:17:19,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 67 [2023-08-30 02:17:20,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2023-08-30 02:17:20,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 02:17:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:20,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:20,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:20,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087168982] [2023-08-30 02:17:20,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087168982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:20,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:20,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 02:17:20,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938876285] [2023-08-30 02:17:20,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:20,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 02:17:20,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:20,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 02:17:20,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 02:17:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 370 [2023-08-30 02:17:23,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 185.1) internal successors, (1851), 10 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:23,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:23,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 370 [2023-08-30 02:17:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:24,494 INFO L130 PetriNetUnfolder]: 325/586 cut-off events. [2023-08-30 02:17:24,494 INFO L131 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2023-08-30 02:17:24,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 586 events. 325/586 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1704 event pairs, 203 based on Foata normal form. 1/553 useless extension candidates. Maximal degree in co-relation 1284. Up to 483 conditions per place. [2023-08-30 02:17:24,496 INFO L137 encePairwiseOnDemand]: 362/370 looper letters, 45 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2023-08-30 02:17:24,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 327 flow [2023-08-30 02:17:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 02:17:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 02:17:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1506 transitions. [2023-08-30 02:17:24,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087837837837837 [2023-08-30 02:17:24,499 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1506 transitions. [2023-08-30 02:17:24,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1506 transitions. [2023-08-30 02:17:24,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:24,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1506 transitions. [2023-08-30 02:17:24,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 188.25) internal successors, (1506), 8 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:24,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 370.0) internal successors, (3330), 9 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:24,504 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 370.0) internal successors, (3330), 9 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:24,504 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 197 flow. Second operand 8 states and 1506 transitions. [2023-08-30 02:17:24,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 327 flow [2023-08-30 02:17:24,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 315 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 02:17:24,506 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 209 flow [2023-08-30 02:17:24,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-08-30 02:17:24,506 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -29 predicate places. [2023-08-30 02:17:24,506 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 209 flow [2023-08-30 02:17:24,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 185.1) internal successors, (1851), 10 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:24,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:24,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:24,521 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 [2023-08-30 02:17:24,720 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 [2023-08-30 02:17:24,721 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:24,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1789116106, now seen corresponding path program 1 times [2023-08-30 02:17:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:24,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632632463] [2023-08-30 02:17:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:24,722 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 [2023-08-30 02:17:24,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:24,723 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) [2023-08-30 02:17:24,726 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 [2023-08-30 02:17:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 02:17:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:24,929 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:24,962 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:17:24,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:17:25,026 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:25,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:25,134 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-30 02:17:25,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-30 02:17:25,279 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-30 02:17:25,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-30 02:17:25,461 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-30 02:17:25,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-30 02:17:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:25,834 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-30 02:17:25,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 02:17:29,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 67 [2023-08-30 02:17:30,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2023-08-30 02:17:30,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 02:17:30,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 02:17:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:30,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:30,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:30,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632632463] [2023-08-30 02:17:30,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632632463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:30,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:30,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 02:17:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850851989] [2023-08-30 02:17:30,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:30,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:17:30,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:17:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:17:36,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 370 [2023-08-30 02:17:36,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 209 flow. Second operand has 12 states, 12 states have (on average 180.75) internal successors, (2169), 12 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:36,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:36,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 370 [2023-08-30 02:17:36,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:37,346 INFO L130 PetriNetUnfolder]: 325/585 cut-off events. [2023-08-30 02:17:37,346 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2023-08-30 02:17:37,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 585 events. 325/585 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1696 event pairs, 202 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 1290. Up to 483 conditions per place. [2023-08-30 02:17:37,349 INFO L137 encePairwiseOnDemand]: 360/370 looper letters, 45 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2023-08-30 02:17:37,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 354 flow [2023-08-30 02:17:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:17:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:17:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1833 transitions. [2023-08-30 02:17:37,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954054054054054 [2023-08-30 02:17:37,353 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1833 transitions. [2023-08-30 02:17:37,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1833 transitions. [2023-08-30 02:17:37,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:37,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1833 transitions. [2023-08-30 02:17:37,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 183.3) internal successors, (1833), 10 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:37,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 370.0) internal successors, (4070), 11 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:37,385 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 370.0) internal successors, (4070), 11 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:37,386 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 209 flow. Second operand 10 states and 1833 transitions. [2023-08-30 02:17:37,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 354 flow [2023-08-30 02:17:37,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 336 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 02:17:37,387 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 221 flow [2023-08-30 02:17:37,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=221, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2023-08-30 02:17:37,388 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -26 predicate places. [2023-08-30 02:17:37,388 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 221 flow [2023-08-30 02:17:37,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.75) internal successors, (2169), 12 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:37,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:37,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:37,413 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 [2023-08-30 02:17:37,596 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 [2023-08-30 02:17:37,597 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:37,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:37,597 INFO L85 PathProgramCache]: Analyzing trace with hash 371976286, now seen corresponding path program 1 times [2023-08-30 02:17:37,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:37,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93873283] [2023-08-30 02:17:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:37,598 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 [2023-08-30 02:17:37,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:37,599 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) [2023-08-30 02:17:37,604 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 [2023-08-30 02:17:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 02:17:37,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:17:37,797 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 02:17:37,838 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 02:17:37,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 02:17:37,904 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-30 02:17:37,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-30 02:17:38,017 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-30 02:17:38,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-30 02:17:38,152 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-30 02:17:38,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-30 02:17:38,387 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-30 02:17:38,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-30 02:17:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:17:39,093 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-30 02:17:39,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 02:17:44,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 67 [2023-08-30 02:17:44,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2023-08-30 02:17:44,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 02:17:44,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 02:17:44,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 02:17:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:17:44,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:17:44,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:17:44,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93873283] [2023-08-30 02:17:44,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93873283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:44,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:44,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 02:17:44,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087308678] [2023-08-30 02:17:44,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:44,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:17:44,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:17:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:17:44,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:17:51,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 370 [2023-08-30 02:17:51,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 221 flow. Second operand has 14 states, 14 states have (on average 176.42857142857142) internal successors, (2470), 14 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:51,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:51,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 370 [2023-08-30 02:17:51,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:52,203 INFO L130 PetriNetUnfolder]: 325/584 cut-off events. [2023-08-30 02:17:52,203 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-30 02:17:52,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 584 events. 325/584 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1692 event pairs, 202 based on Foata normal form. 1/551 useless extension candidates. Maximal degree in co-relation 1292. Up to 480 conditions per place. [2023-08-30 02:17:52,205 INFO L137 encePairwiseOnDemand]: 358/370 looper letters, 42 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2023-08-30 02:17:52,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 66 transitions, 358 flow [2023-08-30 02:17:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 02:17:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 02:17:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1966 transitions. [2023-08-30 02:17:52,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483046683046683 [2023-08-30 02:17:52,208 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1966 transitions. [2023-08-30 02:17:52,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1966 transitions. [2023-08-30 02:17:52,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:52,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1966 transitions. [2023-08-30 02:17:52,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 178.72727272727272) internal successors, (1966), 11 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:52,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 370.0) internal successors, (4440), 12 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:52,214 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 370.0) internal successors, (4440), 12 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:52,214 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 221 flow. Second operand 11 states and 1966 transitions. [2023-08-30 02:17:52,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 66 transitions, 358 flow [2023-08-30 02:17:52,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 318 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-08-30 02:17:52,217 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 199 flow [2023-08-30 02:17:52,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=199, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-08-30 02:17:52,217 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2023-08-30 02:17:52,217 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 199 flow [2023-08-30 02:17:52,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 176.42857142857142) internal successors, (2470), 14 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:17:52,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:52,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:52,228 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 [2023-08-30 02:17:52,426 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 [2023-08-30 02:17:52,426 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 02:17:52,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash 986938756, now seen corresponding path program 1 times [2023-08-30 02:17:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:17:52,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141786077] [2023-08-30 02:17:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:52,427 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 [2023-08-30 02:17:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:17:52,428 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) [2023-08-30 02:17:52,430 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 [2023-08-30 02:17:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:17:52,627 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:17:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:17:52,880 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-30 02:17:52,881 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:17:52,881 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (70 of 71 remaining) [2023-08-30 02:17:52,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 71 remaining) [2023-08-30 02:17:52,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 71 remaining) [2023-08-30 02:17:52,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 71 remaining) [2023-08-30 02:17:52,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 71 remaining) [2023-08-30 02:17:52,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 71 remaining) [2023-08-30 02:17:52,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 71 remaining) [2023-08-30 02:17:52,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 71 remaining) [2023-08-30 02:17:52,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 71 remaining) [2023-08-30 02:17:52,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 71 remaining) [2023-08-30 02:17:52,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 71 remaining) [2023-08-30 02:17:52,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 71 remaining) [2023-08-30 02:17:52,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 71 remaining) [2023-08-30 02:17:52,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 71 remaining) [2023-08-30 02:17:52,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 71 remaining) [2023-08-30 02:17:52,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 71 remaining) [2023-08-30 02:17:52,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 71 remaining) [2023-08-30 02:17:52,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 71 remaining) [2023-08-30 02:17:52,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 71 remaining) [2023-08-30 02:17:52,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 71 remaining) [2023-08-30 02:17:52,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 71 remaining) [2023-08-30 02:17:52,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 71 remaining) [2023-08-30 02:17:52,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 71 remaining) [2023-08-30 02:17:52,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 71 remaining) [2023-08-30 02:17:52,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 71 remaining) [2023-08-30 02:17:52,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (45 of 71 remaining) [2023-08-30 02:17:52,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 71 remaining) [2023-08-30 02:17:52,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 71 remaining) [2023-08-30 02:17:52,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 71 remaining) [2023-08-30 02:17:52,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 71 remaining) [2023-08-30 02:17:52,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 71 remaining) [2023-08-30 02:17:52,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 71 remaining) [2023-08-30 02:17:52,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 71 remaining) [2023-08-30 02:17:52,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 71 remaining) [2023-08-30 02:17:52,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 71 remaining) [2023-08-30 02:17:52,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 71 remaining) [2023-08-30 02:17:52,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (34 of 71 remaining) [2023-08-30 02:17:52,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 71 remaining) [2023-08-30 02:17:52,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 71 remaining) [2023-08-30 02:17:52,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 71 remaining) [2023-08-30 02:17:52,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 71 remaining) [2023-08-30 02:17:52,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 71 remaining) [2023-08-30 02:17:52,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 71 remaining) [2023-08-30 02:17:52,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 71 remaining) [2023-08-30 02:17:52,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 71 remaining) [2023-08-30 02:17:52,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 71 remaining) [2023-08-30 02:17:52,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 71 remaining) [2023-08-30 02:17:52,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 71 remaining) [2023-08-30 02:17:52,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 71 remaining) [2023-08-30 02:17:52,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 71 remaining) [2023-08-30 02:17:52,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 71 remaining) [2023-08-30 02:17:52,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 71 remaining) [2023-08-30 02:17:52,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 71 remaining) [2023-08-30 02:17:52,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 71 remaining) [2023-08-30 02:17:52,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 71 remaining) [2023-08-30 02:17:52,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 71 remaining) [2023-08-30 02:17:52,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 71 remaining) [2023-08-30 02:17:52,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 71 remaining) [2023-08-30 02:17:52,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 71 remaining) [2023-08-30 02:17:52,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 71 remaining) [2023-08-30 02:17:52,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 71 remaining) [2023-08-30 02:17:52,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 71 remaining) [2023-08-30 02:17:52,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 71 remaining) [2023-08-30 02:17:52,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 71 remaining) [2023-08-30 02:17:52,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 71 remaining) [2023-08-30 02:17:52,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 71 remaining) [2023-08-30 02:17:52,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 71 remaining) [2023-08-30 02:17:52,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 71 remaining) [2023-08-30 02:17:52,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 71 remaining) [2023-08-30 02:17:52,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 71 remaining) [2023-08-30 02:17:52,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 71 remaining) [2023-08-30 02:17:52,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 02:17:53,102 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 [2023-08-30 02:17:53,103 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:53,107 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 02:17:53,108 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 02:17:53,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 02:17:53 BasicIcfg [2023-08-30 02:17:53,165 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 02:17:53,166 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 02:17:53,166 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 02:17:53,166 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 02:17:53,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:16:31" (3/4) ... [2023-08-30 02:17:53,176 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-30 02:17:53,176 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 02:17:53,177 INFO L158 Benchmark]: Toolchain (without parser) took 83197.69ms. Allocated memory was 100.7MB in the beginning and 8.1GB in the end (delta: 8.0GB). Free memory was 75.5MB in the beginning and 3.5GB in the end (delta: -3.4GB). Peak memory consumption was 4.6GB. Max. memory is 16.1GB. [2023-08-30 02:17:53,177 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 62.9MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:17:53,177 INFO L158 Benchmark]: CACSL2BoogieTranslator took 697.00ms. Allocated memory is still 100.7MB. Free memory was 75.3MB in the beginning and 63.3MB in the end (delta: 11.9MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2023-08-30 02:17:53,177 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.51ms. Allocated memory is still 100.7MB. Free memory was 63.3MB in the beginning and 60.7MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 02:17:53,178 INFO L158 Benchmark]: Boogie Preprocessor took 26.11ms. Allocated memory is still 100.7MB. Free memory was 60.7MB in the beginning and 59.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:17:53,178 INFO L158 Benchmark]: RCFGBuilder took 634.59ms. Allocated memory is still 100.7MB. Free memory was 59.2MB in the beginning and 72.9MB in the end (delta: -13.8MB). Peak memory consumption was 26.1MB. Max. memory is 16.1GB. [2023-08-30 02:17:53,178 INFO L158 Benchmark]: TraceAbstraction took 81778.21ms. Allocated memory was 100.7MB in the beginning and 8.1GB in the end (delta: 8.0GB). Free memory was 72.3MB in the beginning and 3.5GB in the end (delta: -3.4GB). Peak memory consumption was 4.6GB. Max. memory is 16.1GB. [2023-08-30 02:17:53,178 INFO L158 Benchmark]: Witness Printer took 10.46ms. Allocated memory is still 8.1GB. Free memory is still 3.5GB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:17:53,179 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 62.9MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 697.00ms. Allocated memory is still 100.7MB. Free memory was 75.3MB in the beginning and 63.3MB in the end (delta: 11.9MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.51ms. Allocated memory is still 100.7MB. Free memory was 63.3MB in the beginning and 60.7MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.11ms. Allocated memory is still 100.7MB. Free memory was 60.7MB in the beginning and 59.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 634.59ms. Allocated memory is still 100.7MB. Free memory was 59.2MB in the beginning and 72.9MB in the end (delta: -13.8MB). Peak memory consumption was 26.1MB. Max. memory is 16.1GB. * TraceAbstraction took 81778.21ms. Allocated memory was 100.7MB in the beginning and 8.1GB in the end (delta: 8.0GB). Free memory was 72.3MB in the beginning and 3.5GB in the end (delta: -3.4GB). Peak memory consumption was 4.6GB. Max. memory is 16.1GB. * Witness Printer took 10.46ms. Allocated memory is still 8.1GB. Free memory is still 3.5GB. 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: 7.9s, 173 PlacesBefore, 99 PlacesAfterwards, 160 TransitionsBefore, 85 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 5 FixpointIterations, 36 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 125 TotalNumberOfCompositions, 6857 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4532, independent: 4290, independent conditional: 0, independent unconditional: 4290, dependent: 242, dependent conditional: 0, dependent unconditional: 242, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1276, independent: 1212, independent conditional: 0, independent unconditional: 1212, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4532, independent: 3078, independent conditional: 0, independent unconditional: 3078, dependent: 178, dependent conditional: 0, dependent unconditional: 178, unknown: 1276, unknown conditional: 0, unknown unconditional: 1276] , Statistics on independence cache: Total cache size (in pairs): 152, Positive cache size: 127, Positive conditional cache size: 0, Positive unconditional cache size: 127, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1159]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1159. Possible FailurePath: [L1124] 0 char *v; [L1161] 0 pthread_t t; [L1162] FCALL, FORK 0 pthread_create(&t, 0, thread0, 0) VAL [arg={0:0}, pthread_create(&t, 0, thread0, 0)=3, t={17:0}, v={0:0}] [L1146] 1 pthread_t t1, t2, t3, t4, t5; [L1147] FCALL, FORK 1 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=4, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={0:0}] [L1148] 1 \read(t1) VAL [\read(t1)=4, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={0:0}] [L1127] 2 v = malloc(sizeof(char)) [L1128] 2 return 0; [L1148] FCALL, JOIN 2 pthread_join(t1, 0) VAL [\read(t1)=4, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1149] FCALL, FORK 1 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=5, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1133] 3 v[0] = 'X' [L1135] 3 return 0; [L1150] FCALL, FORK 1 pthread_create(&t3, 0, thread3, 0) VAL [\result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=6, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1140] 4 v[0] = 'Y' [L1142] 4 return 0; [L1151] FCALL, FORK 1 pthread_create(&t4, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=7, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1133] 5 v[0] = 'X' [L1135] 5 return 0; [L1152] FCALL, FORK 1 pthread_create(&t5, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=8, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1133] 6 v[0] = 'X' [L1135] 6 return 0; [L1153] 1 \read(t2) VAL [\read(t2)=5, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [\read(t2)=5, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1154] 1 \read(t3) VAL [\read(t3)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [\read(t3)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1155] 1 \read(t4) VAL [\read(t4)=7, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [\read(t4)=7, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1156] 1 \read(t5) VAL [\read(t5)=8, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [\read(t5)=8, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={48:0}, t2={7:0}, t3={52:0}, t4={49:0}, t5={16:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1163] 0 \read(t) VAL [\read(t)=3, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={17:0}, v={3:0}] [L1163] FCALL, JOIN 1 pthread_join(t, 0) VAL [\read(t)=3, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={17:0}, v={3:0}] [L1164] EXPR 0 v[0] [L1164] CALL 0 __VERIFIER_assert(v[0] == 'X') [L1123] COND FALSE 0 !(!expression) [L1164] RET 0 __VERIFIER_assert(v[0] == 'X') [L1165] 0 return 0; [L1165] 0 return 0; - 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: -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: -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: -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: -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: 1151]: 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: 1149]: 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: 1150]: 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: 1147]: 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: 1152]: 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: -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: -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: -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: 1123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1162]: 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: 1149]: 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: 1151]: 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: 1147]: 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: 1150]: 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: 1152]: 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 11 procedures, 281 locations, 71 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: 81.5s, OverallIterations: 20, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 43.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 8300 SdHoareTripleChecker+Valid, 29.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5635 mSDsluCounter, 1042 SdHoareTripleChecker+Invalid, 26.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 694 mSDsCounter, 453 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12080 IncrementalHoareTripleChecker+Invalid, 12537 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 453 mSolverCounterUnsat, 348 mSDtfsCounter, 12080 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 383 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=245occurred in iteration=3, InterpolantAutomatonStates: 92, 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: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 22.3s InterpolantComputationTime, 412 NumberOfCodeBlocks, 412 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 348 ConstructedInterpolants, 169 QuantifiedInterpolants, 13451 SizeOfPredicates, 67 NumberOfNonLiveVariables, 2644 ConjunctsInSsa, 244 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 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 [2023-08-30 02:17:53,201 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