./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.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 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:07:43,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:07:43,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:07:43,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:07:43,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:07:43,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:07:43,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:07:43,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:07:43,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:07:43,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:07:43,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:07:43,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:07:43,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:07:43,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:07:43,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:07:43,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:07:43,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:07:43,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:07:43,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:07:43,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:07:43,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:07:43,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:07:43,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:07:43,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:07:43,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:07:43,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:07:43,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:07:43,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:07:43,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:07:43,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:07:43,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:07:43,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:07:43,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:07:43,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:07:43,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:07:43,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:07:43,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:07:43,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:07:43,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:07:43,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:07:43,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:07:43,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:07:43,200 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:07:43,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:07:43,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:07:43,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:07:43,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:07:43,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:07:43,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:07:43,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:07:43,204 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:07:43,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:07:43,205 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:07:43,205 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:07:43,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:07:43,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:07:43,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:07:43,206 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:07:43,206 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:07:43,206 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:07:43,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:07:43,207 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:07:43,207 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:07:43,207 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:07:43,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:07:43,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:07:43,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:07:43,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:07:43,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:07:43,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:07:43,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:07:43,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:07:43,209 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:07:43,209 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:07:43,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:07:43,210 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:07:43,210 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:07:43,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:07:43,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:07:43,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:07:43,546 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:07:43,547 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:07:43,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-09-01 00:07:44,672 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:07:44,952 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:07:44,952 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-09-01 00:07:44,974 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6d54e6a/9d660b3d3228420f81a5f71e68ab2d42/FLAG7f3a12c7b [2023-09-01 00:07:44,993 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6d54e6a/9d660b3d3228420f81a5f71e68ab2d42 [2023-09-01 00:07:44,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:07:44,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:07:45,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:07:45,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:07:45,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:07:45,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:07:44" (1/1) ... [2023-09-01 00:07:45,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24084010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45, skipping insertion in model container [2023-09-01 00:07:45,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:07:44" (1/1) ... [2023-09-01 00:07:45,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:07:45,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:07:45,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:07:45,469 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:07:45,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:07:45,574 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:07:45,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45 WrapperNode [2023-09-01 00:07:45,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:07:45,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:07:45,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:07:45,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:07:45,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,618 INFO L138 Inliner]: procedures = 262, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-09-01 00:07:45,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:07:45,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:07:45,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:07:45,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:07:45,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:07:45,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:07:45,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:07:45,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:07:45,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (1/1) ... [2023-09-01 00:07:45,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:07:45,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:45,702 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) [2023-09-01 00:07:45,710 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 [2023-09-01 00:07:45,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:07:45,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:07:45,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:07:45,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:07:45,737 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:07:45,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:07:45,737 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:07:45,737 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:07:45,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:07:45,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:07:45,740 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:07:45,851 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:07:45,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:07:46,120 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:07:46,126 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:07:46,126 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 00:07:46,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:07:46 BoogieIcfgContainer [2023-09-01 00:07:46,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:07:46,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:07:46,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:07:46,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:07:46,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:07:44" (1/3) ... [2023-09-01 00:07:46,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc5bdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:07:46, skipping insertion in model container [2023-09-01 00:07:46,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:45" (2/3) ... [2023-09-01 00:07:46,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc5bdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:07:46, skipping insertion in model container [2023-09-01 00:07:46,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:07:46" (3/3) ... [2023-09-01 00:07:46,136 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2023-09-01 00:07:46,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:07:46,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-09-01 00:07:46,152 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:07:46,216 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 00:07:46,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 98 transitions, 201 flow [2023-09-01 00:07:46,316 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2023-09-01 00:07:46,320 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:46,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 97 events. 6/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 211 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-09-01 00:07:46,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 98 transitions, 201 flow [2023-09-01 00:07:46,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 97 transitions, 197 flow [2023-09-01 00:07:46,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:07:46,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 97 transitions, 197 flow [2023-09-01 00:07:46,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 97 transitions, 197 flow [2023-09-01 00:07:46,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 97 transitions, 197 flow [2023-09-01 00:07:46,385 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2023-09-01 00:07:46,386 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:46,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 97 events. 6/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-09-01 00:07:46,391 INFO L119 LiptonReduction]: Number of co-enabled transitions 2430 [2023-09-01 00:07:48,439 INFO L134 LiptonReduction]: Checked pairs total: 3471 [2023-09-01 00:07:48,439 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-09-01 00:07:48,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 00:07:48,466 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;@1502b061, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:07:48,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-09-01 00:07:48,468 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 00:07:48,468 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:48,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:48,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 00:07:48,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:48,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:48,474 INFO L85 PathProgramCache]: Analyzing trace with hash 12213, now seen corresponding path program 1 times [2023-09-01 00:07:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:48,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73375270] [2023-09-01 00:07:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:48,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:48,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:48,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73375270] [2023-09-01 00:07:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73375270] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:48,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:48,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:07:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230257514] [2023-09-01 00:07:48,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:48,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 00:07:48,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 00:07:48,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 00:07:48,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 197 [2023-09-01 00:07:48,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 73 flow. Second operand has 2 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:48,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 197 [2023-09-01 00:07:48,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:48,869 INFO L130 PetriNetUnfolder]: 122/252 cut-off events. [2023-09-01 00:07:48,869 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:48,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 252 events. 122/252 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1040 event pairs, 98 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 488. Up to 245 conditions per place. [2023-09-01 00:07:48,873 INFO L137 encePairwiseOnDemand]: 190/197 looper letters, 27 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-09-01 00:07:48,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 113 flow [2023-09-01 00:07:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 00:07:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 00:07:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 222 transitions. [2023-09-01 00:07:48,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634517766497462 [2023-09-01 00:07:48,890 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 222 transitions. [2023-09-01 00:07:48,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 222 transitions. [2023-09-01 00:07:48,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:48,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 222 transitions. [2023-09-01 00:07:48,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,905 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,907 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 73 flow. Second operand 2 states and 222 transitions. [2023-09-01 00:07:48,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 113 flow [2023-09-01 00:07:48,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:48,911 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 58 flow [2023-09-01 00:07:48,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-09-01 00:07:48,916 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-09-01 00:07:48,916 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 58 flow [2023-09-01 00:07:48,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:48,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:48,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 00:07:48,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:07:48,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:48,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:48,920 INFO L85 PathProgramCache]: Analyzing trace with hash 364060967, now seen corresponding path program 1 times [2023-09-01 00:07:48,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:48,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937867875] [2023-09-01 00:07:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:48,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:49,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937867875] [2023-09-01 00:07:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937867875] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:49,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:49,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:07:49,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407649714] [2023-09-01 00:07:49,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:49,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:07:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:07:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:07:49,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 197 [2023-09-01 00:07:49,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:49,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 197 [2023-09-01 00:07:49,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:49,110 INFO L130 PetriNetUnfolder]: 122/253 cut-off events. [2023-09-01 00:07:49,110 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:49,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 253 events. 122/253 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1043 event pairs, 98 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 500. Up to 245 conditions per place. [2023-09-01 00:07:49,128 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 26 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-09-01 00:07:49,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 116 flow [2023-09-01 00:07:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:07:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:07:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-09-01 00:07:49,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505922165820643 [2023-09-01 00:07:49,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-09-01 00:07:49,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-09-01 00:07:49,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:49,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-09-01 00:07:49,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,136 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 58 flow. Second operand 3 states and 299 transitions. [2023-09-01 00:07:49,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 116 flow [2023-09-01 00:07:49,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:07:49,137 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 70 flow [2023-09-01 00:07:49,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-09-01 00:07:49,138 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-09-01 00:07:49,139 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 70 flow [2023-09-01 00:07:49,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:49,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 00:07:49,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 00:07:49,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:49,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1599281575, now seen corresponding path program 1 times [2023-09-01 00:07:49,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:49,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955976111] [2023-09-01 00:07:49,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:49,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:49,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:49,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955976111] [2023-09-01 00:07:49,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955976111] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:49,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629841036] [2023-09-01 00:07:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:49,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:49,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:49,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:49,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 00:07:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:49,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:07:49,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:49,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:49,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629841036] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:49,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:49,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:07:49,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550580883] [2023-09-01 00:07:49,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:49,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:07:49,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:07:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:07:49,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 197 [2023-09-01 00:07:49,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 90.57142857142857) internal successors, (634), 7 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:49,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 197 [2023-09-01 00:07:49,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:49,530 INFO L130 PetriNetUnfolder]: 122/256 cut-off events. [2023-09-01 00:07:49,530 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:49,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 256 events. 122/256 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1043 event pairs, 98 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 514. Up to 245 conditions per place. [2023-09-01 00:07:49,532 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 26 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-09-01 00:07:49,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 144 flow [2023-09-01 00:07:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:07:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:07:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 568 transitions. [2023-09-01 00:07:49,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805414551607445 [2023-09-01 00:07:49,536 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 568 transitions. [2023-09-01 00:07:49,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 568 transitions. [2023-09-01 00:07:49,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:49,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 568 transitions. [2023-09-01 00:07:49,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.66666666666667) internal successors, (568), 6 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,541 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,542 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 70 flow. Second operand 6 states and 568 transitions. [2023-09-01 00:07:49,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 144 flow [2023-09-01 00:07:49,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 140 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:49,543 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 102 flow [2023-09-01 00:07:49,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-09-01 00:07:49,544 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-09-01 00:07:49,544 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 102 flow [2023-09-01 00:07:49,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.57142857142857) internal successors, (634), 7 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:49,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:49,545 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-09-01 00:07:49,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:49,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:49,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:49,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash -392962649, now seen corresponding path program 2 times [2023-09-01 00:07:49,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:49,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723366959] [2023-09-01 00:07:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:49,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:49,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723366959] [2023-09-01 00:07:49,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723366959] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:49,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423194419] [2023-09-01 00:07:49,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:07:49,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:49,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:49,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:49,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 00:07:49,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 00:07:49,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:07:49,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 00:07:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:50,041 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 [2023-09-01 00:07:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 00:07:50,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:07:50,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423194419] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:50,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 00:07:50,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-09-01 00:07:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682690448] [2023-09-01 00:07:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:50,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 00:07:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 00:07:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-09-01 00:07:50,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-09-01 00:07:50,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:50,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-09-01 00:07:50,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:50,316 INFO L130 PetriNetUnfolder]: 184/400 cut-off events. [2023-09-01 00:07:50,317 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 00:07:50,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 400 events. 184/400 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1852 event pairs, 91 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 792. Up to 232 conditions per place. [2023-09-01 00:07:50,319 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 46 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-09-01 00:07:50,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 236 flow [2023-09-01 00:07:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:07:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:07:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 393 transitions. [2023-09-01 00:07:50,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4987309644670051 [2023-09-01 00:07:50,322 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 393 transitions. [2023-09-01 00:07:50,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 393 transitions. [2023-09-01 00:07:50,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:50,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 393 transitions. [2023-09-01 00:07:50,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,325 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,325 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 102 flow. Second operand 4 states and 393 transitions. [2023-09-01 00:07:50,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 236 flow [2023-09-01 00:07:50,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 222 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:50,327 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 102 flow [2023-09-01 00:07:50,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-09-01 00:07:50,328 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-09-01 00:07:50,328 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 102 flow [2023-09-01 00:07:50,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:50,329 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-09-01 00:07:50,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 00:07:50,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 00:07:50,539 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:50,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash -392962415, now seen corresponding path program 1 times [2023-09-01 00:07:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:50,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737983932] [2023-09-01 00:07:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 00:07:50,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:50,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737983932] [2023-09-01 00:07:50,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737983932] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:50,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:50,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:07:50,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786458813] [2023-09-01 00:07:50,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:50,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:07:50,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:50,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:07:50,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:07:50,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 197 [2023-09-01 00:07:50,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:50,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 197 [2023-09-01 00:07:50,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:50,686 INFO L130 PetriNetUnfolder]: 262/532 cut-off events. [2023-09-01 00:07:50,687 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-09-01 00:07:50,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 532 events. 262/532 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2425 event pairs, 156 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1194. Up to 373 conditions per place. [2023-09-01 00:07:50,690 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 44 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-09-01 00:07:50,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 236 flow [2023-09-01 00:07:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:07:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:07:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-09-01 00:07:50,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228426395939086 [2023-09-01 00:07:50,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-09-01 00:07:50,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-09-01 00:07:50,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:50,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-09-01 00:07:50,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,696 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,696 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 102 flow. Second operand 3 states and 309 transitions. [2023-09-01 00:07:50,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 236 flow [2023-09-01 00:07:50,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:07:50,698 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 112 flow [2023-09-01 00:07:50,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-09-01 00:07:50,699 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-09-01 00:07:50,699 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 112 flow [2023-09-01 00:07:50,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:50,700 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-09-01 00:07:50,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:07:50,701 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:50,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:50,701 INFO L85 PathProgramCache]: Analyzing trace with hash -392962399, now seen corresponding path program 1 times [2023-09-01 00:07:50,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:50,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792001918] [2023-09-01 00:07:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:50,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:50,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792001918] [2023-09-01 00:07:50,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792001918] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952047814] [2023-09-01 00:07:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:50,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:50,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:50,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:50,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 00:07:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:50,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:07:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:50,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:50,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952047814] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:50,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:50,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:07:50,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67145621] [2023-09-01 00:07:50,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:50,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:07:50,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:50,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:07:50,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:07:50,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 197 [2023-09-01 00:07:50,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 112 flow. Second operand has 13 states, 13 states have (on average 90.3076923076923) internal successors, (1174), 13 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:50,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:50,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 197 [2023-09-01 00:07:50,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:51,082 INFO L130 PetriNetUnfolder]: 262/553 cut-off events. [2023-09-01 00:07:51,082 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-09-01 00:07:51,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 553 events. 262/553 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2459 event pairs, 228 based on Foata normal form. 6/421 useless extension candidates. Maximal degree in co-relation 1290. Up to 525 conditions per place. [2023-09-01 00:07:51,086 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 27 selfloop transitions, 11 changer transitions 0/39 dead transitions. [2023-09-01 00:07:51,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 39 transitions, 224 flow [2023-09-01 00:07:51,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:07:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:07:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1110 transitions. [2023-09-01 00:07:51,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46954314720812185 [2023-09-01 00:07:51,090 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1110 transitions. [2023-09-01 00:07:51,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1110 transitions. [2023-09-01 00:07:51,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:51,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1110 transitions. [2023-09-01 00:07:51,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.5) internal successors, (1110), 12 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) [2023-09-01 00:07:51,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,097 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,097 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 112 flow. Second operand 12 states and 1110 transitions. [2023-09-01 00:07:51,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 39 transitions, 224 flow [2023-09-01 00:07:51,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:51,099 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 194 flow [2023-09-01 00:07:51,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=194, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2023-09-01 00:07:51,100 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2023-09-01 00:07:51,100 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 194 flow [2023-09-01 00:07:51,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.3076923076923) internal successors, (1174), 13 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:51,101 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-09-01 00:07:51,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:51,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:51,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:51,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1005534879, now seen corresponding path program 2 times [2023-09-01 00:07:51,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:51,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456232127] [2023-09-01 00:07:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:51,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:51,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:51,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456232127] [2023-09-01 00:07:51,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456232127] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:51,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:51,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:07:51,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394146234] [2023-09-01 00:07:51,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:51,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:07:51,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:51,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:07:51,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:07:51,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 197 [2023-09-01 00:07:51,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:51,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 197 [2023-09-01 00:07:51,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:51,660 INFO L130 PetriNetUnfolder]: 223/472 cut-off events. [2023-09-01 00:07:51,660 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-09-01 00:07:51,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 472 events. 223/472 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1969 event pairs, 168 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1114. Up to 404 conditions per place. [2023-09-01 00:07:51,664 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-09-01 00:07:51,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 306 flow [2023-09-01 00:07:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:07:51,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:07:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-09-01 00:07:51,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5143824027072758 [2023-09-01 00:07:51,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-09-01 00:07:51,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-09-01 00:07:51,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:51,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-09-01 00:07:51,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,668 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 194 flow. Second operand 3 states and 304 transitions. [2023-09-01 00:07:51,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 306 flow [2023-09-01 00:07:51,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 258 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-09-01 00:07:51,674 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 146 flow [2023-09-01 00:07:51,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-09-01 00:07:51,675 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-09-01 00:07:51,675 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 146 flow [2023-09-01 00:07:51,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:51,676 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-09-01 00:07:51,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 00:07:51,677 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:51,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:51,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1005534878, now seen corresponding path program 1 times [2023-09-01 00:07:51,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:51,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994746639] [2023-09-01 00:07:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:51,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:51,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994746639] [2023-09-01 00:07:51,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994746639] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:51,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:51,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 00:07:51,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083236203] [2023-09-01 00:07:51,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:51,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 00:07:51,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:51,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 00:07:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 00:07:51,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 197 [2023-09-01 00:07:51,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:51,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:51,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 197 [2023-09-01 00:07:51,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:52,122 INFO L130 PetriNetUnfolder]: 210/434 cut-off events. [2023-09-01 00:07:52,122 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-09-01 00:07:52,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 434 events. 210/434 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1765 event pairs, 132 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 1048. Up to 326 conditions per place. [2023-09-01 00:07:52,125 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 45 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2023-09-01 00:07:52,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 276 flow [2023-09-01 00:07:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:07:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:07:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2023-09-01 00:07:52,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4784263959390863 [2023-09-01 00:07:52,127 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2023-09-01 00:07:52,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2023-09-01 00:07:52,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:52,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2023-09-01 00:07:52,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:52,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:52,130 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:52,130 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 146 flow. Second operand 4 states and 377 transitions. [2023-09-01 00:07:52,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 276 flow [2023-09-01 00:07:52,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:07:52,132 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 150 flow [2023-09-01 00:07:52,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2023-09-01 00:07:52,133 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2023-09-01 00:07:52,133 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 150 flow [2023-09-01 00:07:52,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:52,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:52,133 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-09-01 00:07:52,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:07:52,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:52,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1106817676, now seen corresponding path program 1 times [2023-09-01 00:07:52,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:52,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999985054] [2023-09-01 00:07:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:52,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999985054] [2023-09-01 00:07:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999985054] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:52,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:52,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 00:07:52,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791154180] [2023-09-01 00:07:52,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:52,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 00:07:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 00:07:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 00:07:52,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 197 [2023-09-01 00:07:52,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:52,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:52,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 197 [2023-09-01 00:07:52,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:52,449 INFO L130 PetriNetUnfolder]: 180/388 cut-off events. [2023-09-01 00:07:52,449 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2023-09-01 00:07:52,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 388 events. 180/388 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1535 event pairs, 13 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 978. Up to 266 conditions per place. [2023-09-01 00:07:52,452 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 55 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2023-09-01 00:07:52,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 370 flow [2023-09-01 00:07:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 00:07:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 00:07:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 473 transitions. [2023-09-01 00:07:52,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48020304568527916 [2023-09-01 00:07:52,454 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 473 transitions. [2023-09-01 00:07:52,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 473 transitions. [2023-09-01 00:07:52,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:52,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 473 transitions. [2023-09-01 00:07:52,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:52,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:52,458 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:52,458 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 150 flow. Second operand 5 states and 473 transitions. [2023-09-01 00:07:52,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 370 flow [2023-09-01 00:07:52,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 360 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 00:07:52,461 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 216 flow [2023-09-01 00:07:52,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-09-01 00:07:52,462 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-09-01 00:07:52,462 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 216 flow [2023-09-01 00:07:52,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:52,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:52,462 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:07:52,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:07:52,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:52,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:52,463 INFO L85 PathProgramCache]: Analyzing trace with hash -522908067, now seen corresponding path program 1 times [2023-09-01 00:07:52,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:52,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896111130] [2023-09-01 00:07:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:52,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:52,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:52,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896111130] [2023-09-01 00:07:52,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896111130] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:52,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483157276] [2023-09-01 00:07:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:52,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:52,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:52,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 00:07:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:52,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 00:07:52,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:52,977 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 [2023-09-01 00:07:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:53,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483157276] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:55,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:55,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-09-01 00:07:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76792827] [2023-09-01 00:07:55,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:55,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 00:07:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 00:07:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-09-01 00:07:56,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-09-01 00:07:56,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 216 flow. Second operand has 15 states, 15 states have (on average 83.0) internal successors, (1245), 15 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:56,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:56,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-09-01 00:07:56,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:56,450 INFO L130 PetriNetUnfolder]: 312/652 cut-off events. [2023-09-01 00:07:56,450 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-09-01 00:07:56,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1923 conditions, 652 events. 312/652 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2480 event pairs, 100 based on Foata normal form. 66/707 useless extension candidates. Maximal degree in co-relation 1902. Up to 296 conditions per place. [2023-09-01 00:07:56,455 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 96 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2023-09-01 00:07:56,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 668 flow [2023-09-01 00:07:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 00:07:56,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 00:07:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 729 transitions. [2023-09-01 00:07:56,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46256345177664976 [2023-09-01 00:07:56,458 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 729 transitions. [2023-09-01 00:07:56,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 729 transitions. [2023-09-01 00:07:56,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:56,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 729 transitions. [2023-09-01 00:07:56,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 91.125) internal successors, (729), 8 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:56,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:56,463 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:56,463 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 216 flow. Second operand 8 states and 729 transitions. [2023-09-01 00:07:56,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 668 flow [2023-09-01 00:07:56,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 668 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:07:56,468 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 268 flow [2023-09-01 00:07:56,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=268, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2023-09-01 00:07:56,470 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2023-09-01 00:07:56,470 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 268 flow [2023-09-01 00:07:56,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 83.0) internal successors, (1245), 15 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:56,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:56,471 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:07:56,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 00:07:56,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:56,677 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:56,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash -740396165, now seen corresponding path program 1 times [2023-09-01 00:07:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:56,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112735720] [2023-09-01 00:07:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:56,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:56,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:56,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112735720] [2023-09-01 00:07:56,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112735720] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:56,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47906891] [2023-09-01 00:07:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:56,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:56,969 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:56,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 00:07:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:57,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 00:07:57,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:57,174 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 [2023-09-01 00:07:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:57,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:57,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47906891] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:57,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:57,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-09-01 00:07:57,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133238796] [2023-09-01 00:07:57,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:57,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 00:07:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 00:07:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-09-01 00:07:58,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-09-01 00:07:58,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 268 flow. Second operand has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:58,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:58,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-09-01 00:07:58,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:58,776 INFO L130 PetriNetUnfolder]: 648/1354 cut-off events. [2023-09-01 00:07:58,776 INFO L131 PetriNetUnfolder]: For 1734/1734 co-relation queries the response was YES. [2023-09-01 00:07:58,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4440 conditions, 1354 events. 648/1354 cut-off events. For 1734/1734 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 6394 event pairs, 150 based on Foata normal form. 180/1511 useless extension candidates. Maximal degree in co-relation 4414. Up to 420 conditions per place. [2023-09-01 00:07:58,785 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 154 selfloop transitions, 8 changer transitions 0/163 dead transitions. [2023-09-01 00:07:58,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 163 transitions, 1222 flow [2023-09-01 00:07:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 00:07:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 00:07:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 766 transitions. [2023-09-01 00:07:58,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860406091370558 [2023-09-01 00:07:58,789 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 766 transitions. [2023-09-01 00:07:58,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 766 transitions. [2023-09-01 00:07:58,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:58,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 766 transitions. [2023-09-01 00:07:58,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.75) internal successors, (766), 8 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:58,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:58,794 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:58,794 INFO L175 Difference]: Start difference. First operand has 71 places, 48 transitions, 268 flow. Second operand 8 states and 766 transitions. [2023-09-01 00:07:58,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 163 transitions, 1222 flow [2023-09-01 00:07:58,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 163 transitions, 1173 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-09-01 00:07:58,800 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 324 flow [2023-09-01 00:07:58,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2023-09-01 00:07:58,801 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2023-09-01 00:07:58,801 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 324 flow [2023-09-01 00:07:58,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:07:58,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:58,802 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-09-01 00:07:58,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:59,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 00:07:59,009 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:07:59,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash -664849330, now seen corresponding path program 2 times [2023-09-01 00:07:59,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:59,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868175977] [2023-09-01 00:07:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:59,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:59,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:59,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868175977] [2023-09-01 00:07:59,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868175977] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:59,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727012077] [2023-09-01 00:07:59,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:07:59,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:59,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:59,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:07:59,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 00:07:59,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:07:59,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:07:59,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 00:07:59,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:59,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:59,842 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 [2023-09-01 00:08:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:00,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:08:00,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727012077] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:00,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 00:08:00,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-09-01 00:08:00,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234721052] [2023-09-01 00:08:00,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:00,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 00:08:00,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 00:08:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-09-01 00:08:00,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 197 [2023-09-01 00:08:00,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 324 flow. Second operand has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:00,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:00,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 197 [2023-09-01 00:08:00,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:00,653 INFO L130 PetriNetUnfolder]: 625/1308 cut-off events. [2023-09-01 00:08:00,653 INFO L131 PetriNetUnfolder]: For 3074/3074 co-relation queries the response was YES. [2023-09-01 00:08:00,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 1308 events. 625/1308 cut-off events. For 3074/3074 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5983 event pairs, 0 based on Foata normal form. 23/1308 useless extension candidates. Maximal degree in co-relation 4705. Up to 525 conditions per place. [2023-09-01 00:08:00,663 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 115 selfloop transitions, 6 changer transitions 0/122 dead transitions. [2023-09-01 00:08:00,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 122 transitions, 1034 flow [2023-09-01 00:08:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 00:08:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 00:08:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 755 transitions. [2023-09-01 00:08:00,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47906091370558374 [2023-09-01 00:08:00,666 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 755 transitions. [2023-09-01 00:08:00,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 755 transitions. [2023-09-01 00:08:00,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:00,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 755 transitions. [2023-09-01 00:08:00,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.375) internal successors, (755), 8 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:00,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:00,671 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:00,671 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 324 flow. Second operand 8 states and 755 transitions. [2023-09-01 00:08:00,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 122 transitions, 1034 flow [2023-09-01 00:08:00,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 122 transitions, 981 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-09-01 00:08:00,679 INFO L231 Difference]: Finished difference. Result has 83 places, 51 transitions, 313 flow [2023-09-01 00:08:00,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=83, PETRI_TRANSITIONS=51} [2023-09-01 00:08:00,680 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 47 predicate places. [2023-09-01 00:08:00,680 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 51 transitions, 313 flow [2023-09-01 00:08:00,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:00,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:00,681 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-09-01 00:08:00,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 00:08:00,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:08:00,889 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:08:00,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:00,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1988989111, now seen corresponding path program 2 times [2023-09-01 00:08:00,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:00,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558210444] [2023-09-01 00:08:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:00,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558210444] [2023-09-01 00:08:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558210444] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:08:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344532367] [2023-09-01 00:08:01,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:08:01,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:08:01,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:08:01,335 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:08:01,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 00:08:01,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:08:01,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:08:01,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 00:08:01,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:08:01,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:08:01,547 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 [2023-09-01 00:08:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:01,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:08:01,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344532367] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:01,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 00:08:01,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-09-01 00:08:01,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902093050] [2023-09-01 00:08:01,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:01,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 00:08:01,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 00:08:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-09-01 00:08:01,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-09-01 00:08:01,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 51 transitions, 313 flow. Second operand has 9 states, 9 states have (on average 88.44444444444444) internal successors, (796), 9 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:01,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:01,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-09-01 00:08:01,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:02,366 INFO L130 PetriNetUnfolder]: 596/1252 cut-off events. [2023-09-01 00:08:02,367 INFO L131 PetriNetUnfolder]: For 2078/2078 co-relation queries the response was YES. [2023-09-01 00:08:02,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4422 conditions, 1252 events. 596/1252 cut-off events. For 2078/2078 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5764 event pairs, 0 based on Foata normal form. 29/1259 useless extension candidates. Maximal degree in co-relation 4393. Up to 309 conditions per place. [2023-09-01 00:08:02,377 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 148 selfloop transitions, 6 changer transitions 0/155 dead transitions. [2023-09-01 00:08:02,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 155 transitions, 1163 flow [2023-09-01 00:08:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 00:08:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 00:08:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 786 transitions. [2023-09-01 00:08:02,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4987309644670051 [2023-09-01 00:08:02,380 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 786 transitions. [2023-09-01 00:08:02,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 786 transitions. [2023-09-01 00:08:02,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:02,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 786 transitions. [2023-09-01 00:08:02,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.25) internal successors, (786), 8 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:02,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:02,385 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:02,385 INFO L175 Difference]: Start difference. First operand has 83 places, 51 transitions, 313 flow. Second operand 8 states and 786 transitions. [2023-09-01 00:08:02,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 155 transitions, 1163 flow [2023-09-01 00:08:02,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 155 transitions, 1107 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 00:08:02,394 INFO L231 Difference]: Finished difference. Result has 83 places, 49 transitions, 288 flow [2023-09-01 00:08:02,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=288, PETRI_PLACES=83, PETRI_TRANSITIONS=49} [2023-09-01 00:08:02,394 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 47 predicate places. [2023-09-01 00:08:02,395 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 49 transitions, 288 flow [2023-09-01 00:08:02,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.44444444444444) internal successors, (796), 9 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:02,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:02,395 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:02,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 00:08:02,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:08:02,602 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:08:02,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:02,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1880032769, now seen corresponding path program 1 times [2023-09-01 00:08:02,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:02,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500149857] [2023-09-01 00:08:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:02,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:02,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500149857] [2023-09-01 00:08:02,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500149857] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:08:02,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853240912] [2023-09-01 00:08:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:08:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:08:02,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:08:02,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 00:08:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:08:02,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:08:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:02,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:08:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:02,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853240912] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:08:02,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:08:02,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 00:08:02,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888411019] [2023-09-01 00:08:02,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:08:02,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:08:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:08:02,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:08:02,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 197 [2023-09-01 00:08:02,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 49 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 91.76923076923077) internal successors, (1193), 13 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:02,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:02,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 197 [2023-09-01 00:08:02,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:03,464 INFO L130 PetriNetUnfolder]: 1058/2176 cut-off events. [2023-09-01 00:08:03,464 INFO L131 PetriNetUnfolder]: For 4992/4992 co-relation queries the response was YES. [2023-09-01 00:08:03,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7643 conditions, 2176 events. 1058/2176 cut-off events. For 4992/4992 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 9705 event pairs, 125 based on Foata normal form. 132/2286 useless extension candidates. Maximal degree in co-relation 7614. Up to 491 conditions per place. [2023-09-01 00:08:03,481 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 178 selfloop transitions, 12 changer transitions 0/191 dead transitions. [2023-09-01 00:08:03,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 191 transitions, 1570 flow [2023-09-01 00:08:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:08:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:08:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1181 transitions. [2023-09-01 00:08:03,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49957698815566837 [2023-09-01 00:08:03,485 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1181 transitions. [2023-09-01 00:08:03,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1181 transitions. [2023-09-01 00:08:03,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:03,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1181 transitions. [2023-09-01 00:08:03,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 98.41666666666667) internal successors, (1181), 12 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:03,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:03,492 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:03,492 INFO L175 Difference]: Start difference. First operand has 83 places, 49 transitions, 288 flow. Second operand 12 states and 1181 transitions. [2023-09-01 00:08:03,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 191 transitions, 1570 flow [2023-09-01 00:08:03,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 191 transitions, 1469 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 00:08:03,500 INFO L231 Difference]: Finished difference. Result has 95 places, 55 transitions, 365 flow [2023-09-01 00:08:03,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=365, PETRI_PLACES=95, PETRI_TRANSITIONS=55} [2023-09-01 00:08:03,501 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2023-09-01 00:08:03,501 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 55 transitions, 365 flow [2023-09-01 00:08:03,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 91.76923076923077) internal successors, (1193), 13 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:03,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:03,502 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:03,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 00:08:03,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 00:08:03,709 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:08:03,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:03,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1520440221, now seen corresponding path program 2 times [2023-09-01 00:08:03,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:03,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301855847] [2023-09-01 00:08:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:03,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-09-01 00:08:03,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:03,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301855847] [2023-09-01 00:08:03,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301855847] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:03,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:03,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:08:03,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066800246] [2023-09-01 00:08:03,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:03,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:08:03,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:03,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:08:03,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:08:04,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-09-01 00:08:04,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 55 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:04,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-09-01 00:08:04,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:04,395 INFO L130 PetriNetUnfolder]: 1036/2107 cut-off events. [2023-09-01 00:08:04,395 INFO L131 PetriNetUnfolder]: For 5134/5134 co-relation queries the response was YES. [2023-09-01 00:08:04,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7949 conditions, 2107 events. 1036/2107 cut-off events. For 5134/5134 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 9758 event pairs, 945 based on Foata normal form. 0/2107 useless extension candidates. Maximal degree in co-relation 7914. Up to 2026 conditions per place. [2023-09-01 00:08:04,410 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 55 selfloop transitions, 4 changer transitions 2/62 dead transitions. [2023-09-01 00:08:04,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 62 transitions, 533 flow [2023-09-01 00:08:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:08:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:08:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 372 transitions. [2023-09-01 00:08:04,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720812182741117 [2023-09-01 00:08:04,412 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 372 transitions. [2023-09-01 00:08:04,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 372 transitions. [2023-09-01 00:08:04,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:04,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 372 transitions. [2023-09-01 00:08:04,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,415 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,415 INFO L175 Difference]: Start difference. First operand has 95 places, 55 transitions, 365 flow. Second operand 4 states and 372 transitions. [2023-09-01 00:08:04,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 62 transitions, 533 flow [2023-09-01 00:08:04,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 62 transitions, 496 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-09-01 00:08:04,429 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 314 flow [2023-09-01 00:08:04,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2023-09-01 00:08:04,429 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 56 predicate places. [2023-09-01 00:08:04,429 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 314 flow [2023-09-01 00:08:04,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:04,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:04,430 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:04,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 00:08:04,430 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:08:04,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1358047202, now seen corresponding path program 1 times [2023-09-01 00:08:04,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:04,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468565944] [2023-09-01 00:08:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-09-01 00:08:04,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:04,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468565944] [2023-09-01 00:08:04,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468565944] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:08:04,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617644681] [2023-09-01 00:08:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:04,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:08:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:08:04,876 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:08:04,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 00:08:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 00:08:05,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:08:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-09-01 00:08:05,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:08:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-09-01 00:08:05,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617644681] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:08:05,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:08:05,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 13 [2023-09-01 00:08:05,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087956652] [2023-09-01 00:08:05,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:08:05,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 00:08:05,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:05,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 00:08:05,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-09-01 00:08:06,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 197 [2023-09-01 00:08:06,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 314 flow. Second operand has 15 states, 15 states have (on average 73.73333333333333) internal successors, (1106), 15 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:06,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 197 [2023-09-01 00:08:06,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:06,694 INFO L130 PetriNetUnfolder]: 989/2004 cut-off events. [2023-09-01 00:08:06,694 INFO L131 PetriNetUnfolder]: For 3924/3924 co-relation queries the response was YES. [2023-09-01 00:08:06,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7114 conditions, 2004 events. 989/2004 cut-off events. For 3924/3924 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 9156 event pairs, 1 based on Foata normal form. 10/2014 useless extension candidates. Maximal degree in co-relation 7078. Up to 1735 conditions per place. [2023-09-01 00:08:06,706 INFO L137 encePairwiseOnDemand]: 189/197 looper letters, 35 selfloop transitions, 5 changer transitions 50/90 dead transitions. [2023-09-01 00:08:06,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 90 transitions, 720 flow [2023-09-01 00:08:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 00:08:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 00:08:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 748 transitions. [2023-09-01 00:08:06,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37969543147208124 [2023-09-01 00:08:06,709 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 748 transitions. [2023-09-01 00:08:06,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 748 transitions. [2023-09-01 00:08:06,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:06,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 748 transitions. [2023-09-01 00:08:06,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 74.8) internal successors, (748), 10 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,715 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,715 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 314 flow. Second operand 10 states and 748 transitions. [2023-09-01 00:08:06,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 90 transitions, 720 flow [2023-09-01 00:08:06,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 682 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-09-01 00:08:06,728 INFO L231 Difference]: Finished difference. Result has 93 places, 38 transitions, 232 flow [2023-09-01 00:08:06,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=93, PETRI_TRANSITIONS=38} [2023-09-01 00:08:06,729 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2023-09-01 00:08:06,729 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 38 transitions, 232 flow [2023-09-01 00:08:06,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.73333333333333) internal successors, (1106), 15 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:06,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:06,730 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:06,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 00:08:06,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 00:08:06,938 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-09-01 00:08:06,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:06,939 INFO L85 PathProgramCache]: Analyzing trace with hash 123714558, now seen corresponding path program 2 times [2023-09-01 00:08:06,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:06,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18965432] [2023-09-01 00:08:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:06,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-09-01 00:08:07,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:07,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18965432] [2023-09-01 00:08:07,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18965432] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:08:07,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221150527] [2023-09-01 00:08:07,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:08:07,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:08:07,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:08:07,558 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:08:07,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 00:08:07,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 00:08:07,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:08:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 00:08:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:08:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-09-01 00:08:07,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:08:07,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221150527] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:07,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 00:08:07,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2023-09-01 00:08:07,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913042473] [2023-09-01 00:08:07,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:07,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 00:08:07,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:07,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 00:08:07,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-09-01 00:08:08,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-09-01 00:08:08,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 38 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:08,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:08,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-09-01 00:08:08,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:08,137 INFO L130 PetriNetUnfolder]: 49/156 cut-off events. [2023-09-01 00:08:08,138 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2023-09-01 00:08:08,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 156 events. 49/156 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 141 event pairs, 46 based on Foata normal form. 1/157 useless extension candidates. Maximal degree in co-relation 511. Up to 155 conditions per place. [2023-09-01 00:08:08,139 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-09-01 00:08:08,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 37 transitions, 300 flow [2023-09-01 00:08:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:08:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:08:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2023-09-01 00:08:08,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276649746192893 [2023-09-01 00:08:08,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2023-09-01 00:08:08,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2023-09-01 00:08:08,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:08,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2023-09-01 00:08:08,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:08,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:08,146 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:08,146 INFO L175 Difference]: Start difference. First operand has 93 places, 38 transitions, 232 flow. Second operand 4 states and 337 transitions. [2023-09-01 00:08:08,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 37 transitions, 300 flow [2023-09-01 00:08:08,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 37 transitions, 277 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-09-01 00:08:08,149 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-09-01 00:08:08,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-09-01 00:08:08,150 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2023-09-01 00:08:08,150 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-09-01 00:08:08,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:08,152 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2023-09-01 00:08:08,153 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-09-01 00:08:08,153 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-09-01 00:08:08,153 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-09-01 00:08:08,153 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-09-01 00:08:08,154 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-09-01 00:08:08,154 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-09-01 00:08:08,154 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-09-01 00:08:08,154 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-09-01 00:08:08,154 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-09-01 00:08:08,154 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 20 remaining) [2023-09-01 00:08:08,154 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 20 remaining) [2023-09-01 00:08:08,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2023-09-01 00:08:08,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2023-09-01 00:08:08,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2023-09-01 00:08:08,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2023-09-01 00:08:08,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2023-09-01 00:08:08,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 20 remaining) [2023-09-01 00:08:08,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 20 remaining) [2023-09-01 00:08:08,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 20 remaining) [2023-09-01 00:08:08,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 00:08:08,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 00:08:08,362 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:08:08,366 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 00:08:08,367 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 00:08:08,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 12:08:08 BasicIcfg [2023-09-01 00:08:08,369 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 00:08:08,370 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 00:08:08,370 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 00:08:08,370 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 00:08:08,370 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:07:46" (3/4) ... [2023-09-01 00:08:08,372 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 00:08:08,378 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-09-01 00:08:08,382 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-09-01 00:08:08,382 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 00:08:08,383 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 00:08:08,421 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 00:08:08,421 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 00:08:08,422 INFO L158 Benchmark]: Toolchain (without parser) took 23424.16ms. Allocated memory was 67.1MB in the beginning and 318.8MB in the end (delta: 251.7MB). Free memory was 45.3MB in the beginning and 195.5MB in the end (delta: -150.2MB). Peak memory consumption was 100.3MB. Max. memory is 16.1GB. [2023-09-01 00:08:08,422 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 52.4MB. Free memory was 29.9MB in the beginning and 29.9MB in the end (delta: 33.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 00:08:08,422 INFO L158 Benchmark]: CACSL2BoogieTranslator took 574.93ms. Allocated memory is still 67.1MB. Free memory was 45.1MB in the beginning and 33.6MB in the end (delta: 11.5MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2023-09-01 00:08:08,423 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.71ms. Allocated memory is still 67.1MB. Free memory was 33.6MB in the beginning and 31.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:08,423 INFO L158 Benchmark]: Boogie Preprocessor took 36.83ms. Allocated memory is still 67.1MB. Free memory was 31.3MB in the beginning and 29.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:08,423 INFO L158 Benchmark]: RCFGBuilder took 472.18ms. Allocated memory is still 67.1MB. Free memory was 29.7MB in the beginning and 31.7MB in the end (delta: -2.0MB). Peak memory consumption was 3.6MB. Max. memory is 16.1GB. [2023-09-01 00:08:08,424 INFO L158 Benchmark]: TraceAbstraction took 22239.32ms. Allocated memory was 67.1MB in the beginning and 318.8MB in the end (delta: 251.7MB). Free memory was 30.8MB in the beginning and 198.7MB in the end (delta: -167.8MB). Peak memory consumption was 83.4MB. Max. memory is 16.1GB. [2023-09-01 00:08:08,424 INFO L158 Benchmark]: Witness Printer took 51.52ms. Allocated memory is still 318.8MB. Free memory was 198.7MB in the beginning and 195.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:08,426 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 52.4MB. Free memory was 29.9MB in the beginning and 29.9MB in the end (delta: 33.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 574.93ms. Allocated memory is still 67.1MB. Free memory was 45.1MB in the beginning and 33.6MB in the end (delta: 11.5MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.71ms. Allocated memory is still 67.1MB. Free memory was 33.6MB in the beginning and 31.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.83ms. Allocated memory is still 67.1MB. Free memory was 31.3MB in the beginning and 29.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 472.18ms. Allocated memory is still 67.1MB. Free memory was 29.7MB in the beginning and 31.7MB in the end (delta: -2.0MB). Peak memory consumption was 3.6MB. Max. memory is 16.1GB. * TraceAbstraction took 22239.32ms. Allocated memory was 67.1MB in the beginning and 318.8MB in the end (delta: 251.7MB). Free memory was 30.8MB in the beginning and 198.7MB in the end (delta: -167.8MB). Peak memory consumption was 83.4MB. Max. memory is 16.1GB. * Witness Printer took 51.52ms. Allocated memory is still 318.8MB. Free memory was 198.7MB in the beginning and 195.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 95 PlacesBefore, 36 PlacesAfterwards, 97 TransitionsBefore, 35 TransitionsAfterwards, 2430 CoEnabledTransitionPairs, 4 FixpointIterations, 23 TrivialSequentialCompositions, 67 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 99 TotalNumberOfCompositions, 3471 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2318, independent: 2215, independent conditional: 0, independent unconditional: 2215, dependent: 103, dependent conditional: 0, dependent unconditional: 103, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1317, independent: 1289, independent conditional: 0, independent unconditional: 1289, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2318, independent: 926, independent conditional: 0, independent unconditional: 926, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 1317, unknown conditional: 0, unknown unconditional: 1317] , Statistics on independence cache: Total cache size (in pairs): 64, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 931]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 120 locations, 20 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: 22.1s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3619 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2988 mSDsluCounter, 877 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 801 mSDsCounter, 175 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7074 IncrementalHoareTripleChecker+Invalid, 7249 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 175 mSolverCounterUnsat, 76 mSDtfsCounter, 7074 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 532 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=365occurred in iteration=14, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 687 NumberOfCodeBlocks, 633 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 804 ConstructedInterpolants, 22 QuantifiedInterpolants, 8198 SizeOfPredicates, 22 NumberOfNonLiveVariables, 2206 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 33 InterpolantComputations, 11 PerfectInterpolantSequences, 2299/2615 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 00:08:08,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE