./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/28-race_reach_70-funloop_racefree.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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:48:08,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:48:08,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:48:08,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:48:08,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:48:08,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:48:08,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:48:08,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:48:08,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:48:08,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:48:08,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:48:08,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:48:08,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:48:08,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:48:08,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:48:08,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:48:08,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:48:08,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:48:08,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:48:08,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:48:08,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:48:08,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:48:08,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:48:08,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:48:08,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:48:08,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:48:08,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:48:08,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:48:08,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:48:08,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:48:08,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:48:08,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:48:08,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:48:08,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:48:08,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:48:08,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:48:08,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:48:08,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:48:08,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:48:08,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:48:08,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:48:08,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:48:08,317 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:48:08,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:48:08,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:48:08,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:48:08,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:48:08,319 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:48:08,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:48:08,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:48:08,320 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:48:08,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:48:08,322 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:48:08,322 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:48:08,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:48:08,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:48:08,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:48:08,323 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:48:08,323 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:48:08,323 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:48:08,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:48:08,324 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:48:08,324 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:48:08,324 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:48:08,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:48:08,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:48:08,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:48:08,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:48:08,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:48:08,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:48:08,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:48:08,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:48:08,326 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:48:08,326 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:48:08,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:48:08,327 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:48:08,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:48:08,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:48:08,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:48:08,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:48:08,680 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:48:08,680 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:48:08,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-29 21:48:09,916 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:48:10,178 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:48:10,181 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-29 21:48:10,200 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a54edee7/0a13167d61444803963cb4eca59f550d/FLAG769e86a6e [2023-08-29 21:48:10,212 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a54edee7/0a13167d61444803963cb4eca59f550d [2023-08-29 21:48:10,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:48:10,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:48:10,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:48:10,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:48:10,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:48:10,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@346ea496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10, skipping insertion in model container [2023-08-29 21:48:10,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:48:10,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:48:10,646 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-08-29 21:48:10,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:48:10,695 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:48:10,752 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-08-29 21:48:10,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:48:10,826 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:48:10,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10 WrapperNode [2023-08-29 21:48:10,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:48:10,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:48:10,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:48:10,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:48:10,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,877 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 195 [2023-08-29 21:48:10,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:48:10,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:48:10,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:48:10,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:48:10,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,908 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:48:10,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:48:10,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:48:10,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:48:10,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (1/1) ... [2023-08-29 21:48:10,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:48:10,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:48:10,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:48:10,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:48:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:48:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:48:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:48:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:48:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:48:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:48:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:48:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:48:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:48:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:48:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:48:11,006 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:48:11,150 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:48:11,152 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:48:11,604 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:48:11,616 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:48:11,616 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-08-29 21:48:11,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:48:11 BoogieIcfgContainer [2023-08-29 21:48:11,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:48:11,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:48:11,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:48:11,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:48:11,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:48:10" (1/3) ... [2023-08-29 21:48:11,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d365bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:48:11, skipping insertion in model container [2023-08-29 21:48:11,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:48:10" (2/3) ... [2023-08-29 21:48:11,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d365bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:48:11, skipping insertion in model container [2023-08-29 21:48:11,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:48:11" (3/3) ... [2023-08-29 21:48:11,628 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-08-29 21:48:11,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:48:11,644 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-08-29 21:48:11,644 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:48:11,738 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:48:11,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 220 transitions, 448 flow [2023-08-29 21:48:11,885 INFO L130 PetriNetUnfolder]: 49/318 cut-off events. [2023-08-29 21:48:11,885 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:48:11,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 49/318 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1325 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 182. Up to 8 conditions per place. [2023-08-29 21:48:11,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 220 transitions, 448 flow [2023-08-29 21:48:11,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 220 transitions, 448 flow [2023-08-29 21:48:11,905 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:48:11,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 220 transitions, 448 flow [2023-08-29 21:48:11,916 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 220 transitions, 448 flow [2023-08-29 21:48:11,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 220 transitions, 448 flow [2023-08-29 21:48:11,961 INFO L130 PetriNetUnfolder]: 49/318 cut-off events. [2023-08-29 21:48:11,961 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:48:11,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 49/318 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1325 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 182. Up to 8 conditions per place. [2023-08-29 21:48:11,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 16432 [2023-08-29 21:48:15,152 INFO L134 LiptonReduction]: Checked pairs total: 30755 [2023-08-29 21:48:15,152 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-29 21:48:15,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:48:15,170 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;@664b18d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:48:15,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-29 21:48:15,174 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-29 21:48:15,174 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:48:15,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:15,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:48:15,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:15,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:15,180 INFO L85 PathProgramCache]: Analyzing trace with hash 868565, now seen corresponding path program 1 times [2023-08-29 21:48:15,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:15,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841411773] [2023-08-29 21:48:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:15,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:48:15,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:15,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841411773] [2023-08-29 21:48:15,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841411773] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:48:15,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:48:15,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:48:15,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101458307] [2023-08-29 21:48:15,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:48:15,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:48:15,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:15,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:48:15,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:48:15,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 412 [2023-08-29 21:48:15,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 98 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:15,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:15,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 412 [2023-08-29 21:48:15,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:15,803 INFO L130 PetriNetUnfolder]: 684/1521 cut-off events. [2023-08-29 21:48:15,804 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:48:15,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1521 events. 684/1521 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9579 event pairs, 580 based on Foata normal form. 104/1127 useless extension candidates. Maximal degree in co-relation 2738. Up to 1296 conditions per place. [2023-08-29 21:48:15,815 INFO L137 encePairwiseOnDemand]: 381/412 looper letters, 56 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-29 21:48:15,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 266 flow [2023-08-29 21:48:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:48:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:48:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-08-29 21:48:15,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194174757281553 [2023-08-29 21:48:15,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-08-29 21:48:15,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-08-29 21:48:15,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:15,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-08-29 21:48:15,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:15,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:15,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:15,864 INFO L175 Difference]: Start difference. First operand has 73 places, 98 transitions, 204 flow. Second operand 3 states and 642 transitions. [2023-08-29 21:48:15,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 266 flow [2023-08-29 21:48:15,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:48:15,872 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 160 flow [2023-08-29 21:48:15,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-29 21:48:15,879 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-08-29 21:48:15,879 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 160 flow [2023-08-29 21:48:15,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:15,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:15,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:48:15,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:48:15,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:15,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:15,890 INFO L85 PathProgramCache]: Analyzing trace with hash 26929924, now seen corresponding path program 1 times [2023-08-29 21:48:15,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:15,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888150912] [2023-08-29 21:48:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:48:15,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:15,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888150912] [2023-08-29 21:48:15,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888150912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:48:15,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348406666] [2023-08-29 21:48:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:15,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:48:15,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:48:15,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:48:16,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:48:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:16,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:48:16,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:48:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:48:16,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:48:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:48:16,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348406666] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:48:16,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:48:16,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:48:16,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677632943] [2023-08-29 21:48:16,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:48:16,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:48:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:48:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:48:16,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 412 [2023-08-29 21:48:16,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 185.28571428571428) internal successors, (1297), 7 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:16,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:16,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 412 [2023-08-29 21:48:16,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:16,444 INFO L130 PetriNetUnfolder]: 684/1524 cut-off events. [2023-08-29 21:48:16,444 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:48:16,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2841 conditions, 1524 events. 684/1524 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9563 event pairs, 580 based on Foata normal form. 0/1026 useless extension candidates. Maximal degree in co-relation 2829. Up to 1296 conditions per place. [2023-08-29 21:48:16,452 INFO L137 encePairwiseOnDemand]: 409/412 looper letters, 56 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-29 21:48:16,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 294 flow [2023-08-29 21:48:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:48:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:48:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1168 transitions. [2023-08-29 21:48:16,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47249190938511326 [2023-08-29 21:48:16,456 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1168 transitions. [2023-08-29 21:48:16,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1168 transitions. [2023-08-29 21:48:16,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:16,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1168 transitions. [2023-08-29 21:48:16,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:16,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:16,464 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:16,464 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 160 flow. Second operand 6 states and 1168 transitions. [2023-08-29 21:48:16,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 294 flow [2023-08-29 21:48:16,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 290 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:48:16,467 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 192 flow [2023-08-29 21:48:16,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-08-29 21:48:16,469 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2023-08-29 21:48:16,469 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 192 flow [2023-08-29 21:48:16,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 185.28571428571428) internal successors, (1297), 7 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:16,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:16,470 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-29 21:48:16,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:48:16,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:48:16,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:16,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash -885140331, now seen corresponding path program 2 times [2023-08-29 21:48:16,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:16,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191155409] [2023-08-29 21:48:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:16,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:48:16,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:16,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191155409] [2023-08-29 21:48:16,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191155409] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:48:16,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:48:16,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:48:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843167741] [2023-08-29 21:48:16,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:48:16,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:48:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:48:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:48:16,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 412 [2023-08-29 21:48:16,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:16,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:16,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 412 [2023-08-29 21:48:16,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:17,083 INFO L130 PetriNetUnfolder]: 638/1410 cut-off events. [2023-08-29 21:48:17,083 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:48:17,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2654 conditions, 1410 events. 638/1410 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8757 event pairs, 500 based on Foata normal form. 0/968 useless extension candidates. Maximal degree in co-relation 2620. Up to 1121 conditions per place. [2023-08-29 21:48:17,091 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 77 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-08-29 21:48:17,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 390 flow [2023-08-29 21:48:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:48:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:48:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-29 21:48:17,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024271844660194 [2023-08-29 21:48:17,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-29 21:48:17,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-29 21:48:17,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:17,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-29 21:48:17,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:17,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:17,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:17,100 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 192 flow. Second operand 3 states and 621 transitions. [2023-08-29 21:48:17,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 390 flow [2023-08-29 21:48:17,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 93 transitions, 376 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 21:48:17,103 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 180 flow [2023-08-29 21:48:17,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2023-08-29 21:48:17,104 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-29 21:48:17,104 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 180 flow [2023-08-29 21:48:17,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:17,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:17,105 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-29 21:48:17,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 21:48:17,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:17,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:17,106 INFO L85 PathProgramCache]: Analyzing trace with hash -885140330, now seen corresponding path program 1 times [2023-08-29 21:48:17,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:17,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754033479] [2023-08-29 21:48:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:17,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:48:17,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:17,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754033479] [2023-08-29 21:48:17,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754033479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:48:17,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112383119] [2023-08-29 21:48:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:17,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:48:17,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:48:17,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:48:17,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:48:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:17,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:48:17,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:48:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:48:17,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:48:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:48:17,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112383119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:48:17,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:48:17,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 21:48:17,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770708830] [2023-08-29 21:48:17,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:48:17,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:48:17,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:17,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:48:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:48:17,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 412 [2023-08-29 21:48:17,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 180 flow. Second operand has 13 states, 13 states have (on average 185.15384615384616) internal successors, (2407), 13 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:17,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:17,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 412 [2023-08-29 21:48:17,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:17,659 INFO L130 PetriNetUnfolder]: 640/1430 cut-off events. [2023-08-29 21:48:17,659 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-29 21:48:17,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 1430 events. 640/1430 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8850 event pairs, 540 based on Foata normal form. 6/1017 useless extension candidates. Maximal degree in co-relation 2679. Up to 1210 conditions per place. [2023-08-29 21:48:17,667 INFO L137 encePairwiseOnDemand]: 409/412 looper letters, 54 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2023-08-29 21:48:17,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 346 flow [2023-08-29 21:48:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:48:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:48:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2279 transitions. [2023-08-29 21:48:17,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46096278317152106 [2023-08-29 21:48:17,674 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2279 transitions. [2023-08-29 21:48:17,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2279 transitions. [2023-08-29 21:48:17,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:17,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2279 transitions. [2023-08-29 21:48:17,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 189.91666666666666) internal successors, (2279), 12 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:17,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:17,690 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:17,690 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 180 flow. Second operand 12 states and 2279 transitions. [2023-08-29 21:48:17,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 346 flow [2023-08-29 21:48:17,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 78 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:48:17,694 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 258 flow [2023-08-29 21:48:17,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=258, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2023-08-29 21:48:17,695 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 18 predicate places. [2023-08-29 21:48:17,695 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 258 flow [2023-08-29 21:48:17,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.15384615384616) internal successors, (2407), 13 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:17,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:17,697 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-29 21:48:17,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:48:17,902 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 [2023-08-29 21:48:17,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:17,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:17,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2063593014, now seen corresponding path program 2 times [2023-08-29 21:48:17,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:17,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602892325] [2023-08-29 21:48:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:17,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:18,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:18,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602892325] [2023-08-29 21:48:18,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602892325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:48:18,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:48:18,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:48:18,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020842929] [2023-08-29 21:48:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:48:18,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:48:18,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:48:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:48:18,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 412 [2023-08-29 21:48:18,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:18,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:18,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 412 [2023-08-29 21:48:18,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:18,315 INFO L130 PetriNetUnfolder]: 612/1330 cut-off events. [2023-08-29 21:48:18,316 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-29 21:48:18,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 1330 events. 612/1330 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8235 event pairs, 0 based on Foata normal form. 0/907 useless extension candidates. Maximal degree in co-relation 2537. Up to 1174 conditions per place. [2023-08-29 21:48:18,323 INFO L137 encePairwiseOnDemand]: 408/412 looper letters, 85 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-29 21:48:18,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 476 flow [2023-08-29 21:48:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:48:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:48:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-08-29 21:48:18,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105177993527508 [2023-08-29 21:48:18,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-08-29 21:48:18,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-08-29 21:48:18,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:18,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-08-29 21:48:18,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:18,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:18,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:18,330 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 258 flow. Second operand 3 states and 631 transitions. [2023-08-29 21:48:18,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 476 flow [2023-08-29 21:48:18,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 100 transitions, 428 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-29 21:48:18,335 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 220 flow [2023-08-29 21:48:18,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2023-08-29 21:48:18,336 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 16 predicate places. [2023-08-29 21:48:18,336 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 220 flow [2023-08-29 21:48:18,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:18,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:18,337 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-29 21:48:18,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:48:18,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:18,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1661798980, now seen corresponding path program 1 times [2023-08-29 21:48:18,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:18,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995241060] [2023-08-29 21:48:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:18,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:18,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:18,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995241060] [2023-08-29 21:48:18,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995241060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:48:18,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563163522] [2023-08-29 21:48:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:18,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:48:18,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:48:18,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:48:18,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:48:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:18,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:48:18,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:48:18,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:48:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:18,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:48:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:18,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563163522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:48:18,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:48:18,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-29 21:48:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343224941] [2023-08-29 21:48:18,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:48:18,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:48:18,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:48:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:48:18,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 412 [2023-08-29 21:48:18,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 220 flow. Second operand has 8 states, 8 states have (on average 182.125) internal successors, (1457), 8 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:18,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:18,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 412 [2023-08-29 21:48:18,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:19,048 INFO L130 PetriNetUnfolder]: 47/148 cut-off events. [2023-08-29 21:48:19,048 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-08-29 21:48:19,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 148 events. 47/148 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 492 event pairs, 10 based on Foata normal form. 21/151 useless extension candidates. Maximal degree in co-relation 310. Up to 84 conditions per place. [2023-08-29 21:48:19,049 INFO L137 encePairwiseOnDemand]: 408/412 looper letters, 55 selfloop transitions, 2 changer transitions 2/67 dead transitions. [2023-08-29 21:48:19,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 67 transitions, 309 flow [2023-08-29 21:48:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:48:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:48:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 771 transitions. [2023-08-29 21:48:19,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678398058252427 [2023-08-29 21:48:19,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 771 transitions. [2023-08-29 21:48:19,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 771 transitions. [2023-08-29 21:48:19,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:19,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 771 transitions. [2023-08-29 21:48:19,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:19,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 412.0) internal successors, (2060), 5 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:19,057 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 412.0) internal successors, (2060), 5 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:19,057 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 220 flow. Second operand 4 states and 771 transitions. [2023-08-29 21:48:19,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 67 transitions, 309 flow [2023-08-29 21:48:19,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 303 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:48:19,060 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 143 flow [2023-08-29 21:48:19,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-08-29 21:48:19,060 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -14 predicate places. [2023-08-29 21:48:19,061 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 143 flow [2023-08-29 21:48:19,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 182.125) internal successors, (1457), 8 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:19,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:19,061 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:48:19,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 21:48:19,269 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 [2023-08-29 21:48:19,269 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:19,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash 738753709, now seen corresponding path program 1 times [2023-08-29 21:48:19,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:19,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914774590] [2023-08-29 21:48:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:19,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:19,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:19,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914774590] [2023-08-29 21:48:19,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914774590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:48:19,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:48:19,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 21:48:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696236169] [2023-08-29 21:48:19,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:48:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:48:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:48:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:48:19,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 412 [2023-08-29 21:48:19,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 143 flow. Second operand has 7 states, 7 states have (on average 172.28571428571428) internal successors, (1206), 7 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:19,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:19,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 412 [2023-08-29 21:48:19,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:19,943 INFO L130 PetriNetUnfolder]: 82/243 cut-off events. [2023-08-29 21:48:19,943 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2023-08-29 21:48:19,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 243 events. 82/243 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 851 event pairs, 38 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 470. Up to 103 conditions per place. [2023-08-29 21:48:19,945 INFO L137 encePairwiseOnDemand]: 404/412 looper letters, 53 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-08-29 21:48:19,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 313 flow [2023-08-29 21:48:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:48:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:48:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1249 transitions. [2023-08-29 21:48:19,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330790568654646 [2023-08-29 21:48:19,949 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1249 transitions. [2023-08-29 21:48:19,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1249 transitions. [2023-08-29 21:48:19,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:19,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1249 transitions. [2023-08-29 21:48:19,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.42857142857142) internal successors, (1249), 7 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:19,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:19,957 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:19,957 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 143 flow. Second operand 7 states and 1249 transitions. [2023-08-29 21:48:19,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 313 flow [2023-08-29 21:48:19,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:48:19,959 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 170 flow [2023-08-29 21:48:19,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=7, PETRI_FLOW=170, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-08-29 21:48:19,960 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2023-08-29 21:48:19,960 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 170 flow [2023-08-29 21:48:19,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 172.28571428571428) internal successors, (1206), 7 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:19,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:19,961 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:48:19,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:48:19,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:19,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:19,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1426526198, now seen corresponding path program 1 times [2023-08-29 21:48:19,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:19,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425673549] [2023-08-29 21:48:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:20,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:20,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425673549] [2023-08-29 21:48:20,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425673549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:48:20,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:48:20,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:48:20,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816618506] [2023-08-29 21:48:20,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:48:20,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:48:20,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:20,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:48:20,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:48:20,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-29 21:48:20,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 170.66666666666666) internal successors, (1024), 6 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:20,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-29 21:48:20,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:20,344 INFO L130 PetriNetUnfolder]: 82/213 cut-off events. [2023-08-29 21:48:20,344 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-08-29 21:48:20,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 213 events. 82/213 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 622 event pairs, 2 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 470. Up to 178 conditions per place. [2023-08-29 21:48:20,346 INFO L137 encePairwiseOnDemand]: 405/412 looper letters, 39 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-29 21:48:20,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 44 transitions, 247 flow [2023-08-29 21:48:20,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:48:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:48:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2023-08-29 21:48:20,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308252427184466 [2023-08-29 21:48:20,348 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2023-08-29 21:48:20,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2023-08-29 21:48:20,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:20,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2023-08-29 21:48:20,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 412.0) internal successors, (2060), 5 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,353 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 412.0) internal successors, (2060), 5 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,354 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 170 flow. Second operand 4 states and 710 transitions. [2023-08-29 21:48:20,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 44 transitions, 247 flow [2023-08-29 21:48:20,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 44 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:48:20,356 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 161 flow [2023-08-29 21:48:20,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2023-08-29 21:48:20,356 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -14 predicate places. [2023-08-29 21:48:20,357 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 161 flow [2023-08-29 21:48:20,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 170.66666666666666) internal successors, (1024), 6 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:20,357 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:48:20,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:48:20,358 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:20,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1426526408, now seen corresponding path program 1 times [2023-08-29 21:48:20,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:20,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579379653] [2023-08-29 21:48:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:20,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:20,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:20,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579379653] [2023-08-29 21:48:20,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579379653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:48:20,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:48:20,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:48:20,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079702956] [2023-08-29 21:48:20,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:48:20,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:48:20,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:20,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:48:20,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:48:20,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 412 [2023-08-29 21:48:20,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 161 flow. Second operand has 6 states, 6 states have (on average 175.66666666666666) internal successors, (1054), 6 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:20,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 412 [2023-08-29 21:48:20,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:20,877 INFO L130 PetriNetUnfolder]: 111/331 cut-off events. [2023-08-29 21:48:20,877 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-08-29 21:48:20,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 331 events. 111/331 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1329 event pairs, 2 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 752. Up to 136 conditions per place. [2023-08-29 21:48:20,879 INFO L137 encePairwiseOnDemand]: 405/412 looper letters, 65 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2023-08-29 21:48:20,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 424 flow [2023-08-29 21:48:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:48:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:48:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1105 transitions. [2023-08-29 21:48:20,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470064724919094 [2023-08-29 21:48:20,882 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1105 transitions. [2023-08-29 21:48:20,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1105 transitions. [2023-08-29 21:48:20,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:20,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1105 transitions. [2023-08-29 21:48:20,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.16666666666666) internal successors, (1105), 6 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,889 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,889 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 161 flow. Second operand 6 states and 1105 transitions. [2023-08-29 21:48:20,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 424 flow [2023-08-29 21:48:20,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:48:20,892 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 238 flow [2023-08-29 21:48:20,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-29 21:48:20,893 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2023-08-29 21:48:20,893 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 238 flow [2023-08-29 21:48:20,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 175.66666666666666) internal successors, (1054), 6 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:20,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:20,894 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:48:20,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:48:20,894 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:20,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1333701937, now seen corresponding path program 1 times [2023-08-29 21:48:20,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:20,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528590726] [2023-08-29 21:48:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:20,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:21,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:21,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528590726] [2023-08-29 21:48:21,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528590726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:48:21,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178338172] [2023-08-29 21:48:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:21,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:48:21,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:48:21,071 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:48:21,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:48:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:21,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 21:48:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:48:21,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-29 21:48:21,261 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 21:48:21,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 21:48:21,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 21:48:21,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 21:48:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:21,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:48:27,410 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_272 (Array Int Int)) (|t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_272) |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|) |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|) 0)) is different from false [2023-08-29 21:48:29,438 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_272 (Array Int Int)) (|t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_272) |c_~#cache~0.base|) |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|) 0)) is different from false [2023-08-29 21:48:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2023-08-29 21:48:29,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178338172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:48:29,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:48:29,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 21:48:29,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649162036] [2023-08-29 21:48:29,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:48:29,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:48:29,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:29,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:48:29,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=81, Unknown=4, NotChecked=38, Total=156 [2023-08-29 21:48:29,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 412 [2023-08-29 21:48:29,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 238 flow. Second operand has 13 states, 13 states have (on average 131.6153846153846) internal successors, (1711), 13 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:29,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:29,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 412 [2023-08-29 21:48:29,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:31,947 INFO L130 PetriNetUnfolder]: 111/320 cut-off events. [2023-08-29 21:48:31,947 INFO L131 PetriNetUnfolder]: For 246/246 co-relation queries the response was YES. [2023-08-29 21:48:31,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 320 events. 111/320 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1230 event pairs, 18 based on Foata normal form. 2/308 useless extension candidates. Maximal degree in co-relation 900. Up to 136 conditions per place. [2023-08-29 21:48:31,949 INFO L137 encePairwiseOnDemand]: 405/412 looper letters, 58 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2023-08-29 21:48:31,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 434 flow [2023-08-29 21:48:31,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:48:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:48:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 823 transitions. [2023-08-29 21:48:31,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33292880258899676 [2023-08-29 21:48:31,953 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 823 transitions. [2023-08-29 21:48:31,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 823 transitions. [2023-08-29 21:48:31,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:31,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 823 transitions. [2023-08-29 21:48:31,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.16666666666666) internal successors, (823), 6 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:31,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:31,959 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:31,959 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 238 flow. Second operand 6 states and 823 transitions. [2023-08-29 21:48:31,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 434 flow [2023-08-29 21:48:31,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 430 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:48:31,962 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 255 flow [2023-08-29 21:48:31,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=255, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-08-29 21:48:31,964 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-08-29 21:48:31,964 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 255 flow [2023-08-29 21:48:31,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.6153846153846) internal successors, (1711), 13 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:31,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:31,977 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:48:31,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 21:48:32,185 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 [2023-08-29 21:48:32,186 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:32,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2130278003, now seen corresponding path program 1 times [2023-08-29 21:48:32,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:32,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069563519] [2023-08-29 21:48:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:32,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:32,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069563519] [2023-08-29 21:48:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069563519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:48:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448687313] [2023-08-29 21:48:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:32,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:48:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:48:32,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:48:32,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:48:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-29 21:48:32,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:48:32,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:48:32,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:48:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:32,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:48:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:35,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448687313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:48:35,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:48:35,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2023-08-29 21:48:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207454532] [2023-08-29 21:48:35,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:48:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 21:48:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 21:48:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-29 21:48:36,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 412 [2023-08-29 21:48:36,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 255 flow. Second operand has 19 states, 19 states have (on average 166.3684210526316) internal successors, (3161), 19 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:36,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:36,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 412 [2023-08-29 21:48:36,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:37,197 INFO L130 PetriNetUnfolder]: 280/784 cut-off events. [2023-08-29 21:48:37,197 INFO L131 PetriNetUnfolder]: For 602/602 co-relation queries the response was YES. [2023-08-29 21:48:37,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2313 conditions, 784 events. 280/784 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3565 event pairs, 52 based on Foata normal form. 54/805 useless extension candidates. Maximal degree in co-relation 2254. Up to 147 conditions per place. [2023-08-29 21:48:37,202 INFO L137 encePairwiseOnDemand]: 401/412 looper letters, 131 selfloop transitions, 21 changer transitions 0/155 dead transitions. [2023-08-29 21:48:37,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 155 transitions, 998 flow [2023-08-29 21:48:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:48:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:48:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2082 transitions. [2023-08-29 21:48:37,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211165048543689 [2023-08-29 21:48:37,208 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2082 transitions. [2023-08-29 21:48:37,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2082 transitions. [2023-08-29 21:48:37,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:37,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2082 transitions. [2023-08-29 21:48:37,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 173.5) internal successors, (2082), 12 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:37,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:37,219 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:37,219 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 255 flow. Second operand 12 states and 2082 transitions. [2023-08-29 21:48:37,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 155 transitions, 998 flow [2023-08-29 21:48:37,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 155 transitions, 959 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:48:37,225 INFO L231 Difference]: Finished difference. Result has 80 places, 64 transitions, 406 flow [2023-08-29 21:48:37,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=406, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2023-08-29 21:48:37,226 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2023-08-29 21:48:37,226 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 406 flow [2023-08-29 21:48:37,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 166.3684210526316) internal successors, (3161), 19 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:48:37,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:37,227 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:48:37,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:48:37,433 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 [2023-08-29 21:48:37,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:48:37,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash -575719417, now seen corresponding path program 1 times [2023-08-29 21:48:37,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:37,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615328711] [2023-08-29 21:48:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:37,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:48:38,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:38,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615328711] [2023-08-29 21:48:38,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615328711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:48:38,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952196481] [2023-08-29 21:48:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:38,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:48:38,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:48:38,005 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:48:38,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:48:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:38,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-29 21:48:38,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:48:38,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-29 21:48:38,174 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 21:48:38,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 21:48:38,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 21:48:38,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2023-08-29 21:48:38,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-29 21:48:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 21:48:38,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:48:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 21:48:52,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952196481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:48:52,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:48:52,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-08-29 21:48:52,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707253613] [2023-08-29 21:48:52,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:48:52,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 21:48:52,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:52,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 21:48:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=369, Unknown=9, NotChecked=0, Total=462 [2023-08-29 21:48:54,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:48:56,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:48:58,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:00,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:02,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:04,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:06,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:08,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:10,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:12,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:14,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:16,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:18,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:20,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:22,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:24,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:26,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:28,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:30,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:32,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:34,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:36,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:38,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:40,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:42,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:44,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:46,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:48,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:50,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:52,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:54,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:57,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:49:59,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:01,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:03,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:05,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:07,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:09,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:11,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:13,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:15,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:17,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:19,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:21,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:23,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:25,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:27,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:29,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:31,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:33,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:35,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:37,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:39,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:41,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:43,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:45,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:47,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:49,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:51,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:53,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:55,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:50:55,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 412 [2023-08-29 21:50:55,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 406 flow. Second operand has 22 states, 22 states have (on average 121.68181818181819) internal successors, (2677), 22 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:50:55,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:50:55,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 412 [2023-08-29 21:50:55,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:50:55,885 INFO L130 PetriNetUnfolder]: 276/868 cut-off events. [2023-08-29 21:50:55,885 INFO L131 PetriNetUnfolder]: For 942/942 co-relation queries the response was YES. [2023-08-29 21:50:55,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2720 conditions, 868 events. 276/868 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4427 event pairs, 33 based on Foata normal form. 12/838 useless extension candidates. Maximal degree in co-relation 2657. Up to 249 conditions per place. [2023-08-29 21:50:55,891 INFO L137 encePairwiseOnDemand]: 401/412 looper letters, 102 selfloop transitions, 24 changer transitions 0/129 dead transitions. [2023-08-29 21:50:55,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 129 transitions, 1027 flow [2023-08-29 21:50:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:50:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:50:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1501 transitions. [2023-08-29 21:50:55,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3036003236245955 [2023-08-29 21:50:55,897 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1501 transitions. [2023-08-29 21:50:55,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1501 transitions. [2023-08-29 21:50:55,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:50:55,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1501 transitions. [2023-08-29 21:50:55,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 125.08333333333333) internal successors, (1501), 12 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:50:55,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:50:55,907 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:50:55,907 INFO L175 Difference]: Start difference. First operand has 80 places, 64 transitions, 406 flow. Second operand 12 states and 1501 transitions. [2023-08-29 21:50:55,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 129 transitions, 1027 flow [2023-08-29 21:50:55,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 949 flow, removed 28 selfloop flow, removed 6 redundant places. [2023-08-29 21:50:55,913 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 581 flow [2023-08-29 21:50:55,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=581, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2023-08-29 21:50:55,914 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 19 predicate places. [2023-08-29 21:50:55,914 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 581 flow [2023-08-29 21:50:55,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 121.68181818181819) internal successors, (2677), 22 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:50:55,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:50:55,915 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:50:55,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 21:50:56,121 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 [2023-08-29 21:50:56,121 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:50:56,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:50:56,122 INFO L85 PathProgramCache]: Analyzing trace with hash -187338172, now seen corresponding path program 1 times [2023-08-29 21:50:56,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:50:56,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851567300] [2023-08-29 21:50:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:50:56,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:50:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:50:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:50:56,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:50:56,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851567300] [2023-08-29 21:50:56,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851567300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:50:56,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806660260] [2023-08-29 21:50:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:50:56,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:50:56,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:50:56,649 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:50:56,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:50:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:50:56,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-29 21:50:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:50:56,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-29 21:50:56,837 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 21:50:56,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 21:50:56,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 21:50:56,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2023-08-29 21:50:56,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 23 [2023-08-29 21:50:57,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-29 21:50:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:50:57,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:51:23,156 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85| Int)) (= (select (select (store |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (store (select |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|) |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) |c_t_funThread1of1ForFork0_cache_entry_addref_#t~post38#1|))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85|) 0)) is different from false [2023-08-29 21:51:25,162 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85| Int)) (= (select (select (store |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse0 (select |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|))))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85|) 0)) is different from false [2023-08-29 21:51:25,174 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85| Int) (v_ArrVal_542 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_542))) (store .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse1 (select .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse1 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse1 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|)))))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85|) 0)) is different from false [2023-08-29 21:51:25,186 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85| Int) (v_ArrVal_542 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (store (select |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|) |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ |c_t_funThread1of1ForFork0_cache_entry_addref_#t~post35#1| 1))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_542))) (store .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse1 (select .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse1 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse1 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|)))))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85|) 0)) is different from false [2023-08-29 21:51:27,803 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| Int) (|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85| Int) (v_ArrVal_542 (Array Int Int))) (= 0 (select (select (let ((.cse0 (store (store |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse2 (select |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse2 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (select .cse2 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|) 1)))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_542))) (store .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse1 (select .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse1 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse1 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|)))))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85|))) is different from false [2023-08-29 21:51:34,232 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_539 (Array Int Int)) (|t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| Int) (|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85| Int) (v_ArrVal_542 (Array Int Int))) (= (select (let ((.cse0 (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_539))) (store .cse1 |c_~#cache~0.base| (let ((.cse2 (select .cse1 |c_~#cache~0.base|))) (store .cse2 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (select .cse2 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|) 1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_542) |c_~#cache~0.base|))) (store .cse0 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse0 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|)))) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_85|) 0)) is different from false [2023-08-29 21:51:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-08-29 21:51:34,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806660260] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:51:34,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:51:34,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 10] total 24 [2023-08-29 21:51:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768694249] [2023-08-29 21:51:34,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:51:34,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-29 21:51:34,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:51:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-29 21:51:34,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=293, Unknown=19, NotChecked=246, Total=650 [2023-08-29 21:51:34,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 412 [2023-08-29 21:51:34,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 581 flow. Second operand has 26 states, 26 states have (on average 121.38461538461539) internal successors, (3156), 26 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:51:34,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:51:34,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 412 [2023-08-29 21:51:34,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:51:56,259 WARN L222 SmtUtils]: Spent 20.97s on a formula simplification. DAG size of input: 47 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 21:51:58,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:00,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:02,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:04,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:06,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:08,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:10,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:12,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:14,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:16,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:19,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:21,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:23,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:26,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:28,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:30,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:32,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:52:43,982 WARN L222 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 44 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 21:52:46,506 INFO L130 PetriNetUnfolder]: 349/1077 cut-off events. [2023-08-29 21:52:46,507 INFO L131 PetriNetUnfolder]: For 1738/1738 co-relation queries the response was YES. [2023-08-29 21:52:46,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3754 conditions, 1077 events. 349/1077 cut-off events. For 1738/1738 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5966 event pairs, 30 based on Foata normal form. 4/1021 useless extension candidates. Maximal degree in co-relation 3684. Up to 494 conditions per place. [2023-08-29 21:52:46,515 INFO L137 encePairwiseOnDemand]: 400/412 looper letters, 56 selfloop transitions, 52 changer transitions 0/111 dead transitions. [2023-08-29 21:52:46,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 111 transitions, 964 flow [2023-08-29 21:52:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 21:52:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 21:52:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1356 transitions. [2023-08-29 21:52:46,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2992056487202118 [2023-08-29 21:52:46,520 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1356 transitions. [2023-08-29 21:52:46,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1356 transitions. [2023-08-29 21:52:46,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:52:46,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1356 transitions. [2023-08-29 21:52:46,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 123.27272727272727) internal successors, (1356), 11 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:52:46,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:52:46,529 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:52:46,530 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 581 flow. Second operand 11 states and 1356 transitions. [2023-08-29 21:52:46,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 111 transitions, 964 flow [2023-08-29 21:52:46,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 111 transitions, 904 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-08-29 21:52:46,546 INFO L231 Difference]: Finished difference. Result has 100 places, 101 transitions, 815 flow [2023-08-29 21:52:46,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=815, PETRI_PLACES=100, PETRI_TRANSITIONS=101} [2023-08-29 21:52:46,547 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 27 predicate places. [2023-08-29 21:52:46,547 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 101 transitions, 815 flow [2023-08-29 21:52:46,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 121.38461538461539) internal successors, (3156), 26 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:52:46,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:52:46,548 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:52:46,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 21:52:46,754 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 [2023-08-29 21:52:46,755 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:52:46,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:52:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1325684933, now seen corresponding path program 2 times [2023-08-29 21:52:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:52:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509133353] [2023-08-29 21:52:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:52:46,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:52:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:52:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:52:49,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:52:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509133353] [2023-08-29 21:52:49,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509133353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:52:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789329159] [2023-08-29 21:52:49,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:52:49,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:52:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:52:49,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:52:49,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:52:49,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:52:49,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:52:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 21:52:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:52:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:52:50,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:52:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:52:55,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:53:06,186 WARN L222 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 21:53:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:53:07,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789329159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:53:07,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:53:07,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2023-08-29 21:53:07,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487967428] [2023-08-29 21:53:07,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:53:07,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-29 21:53:07,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:53:07,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-29 21:53:07,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2023-08-29 21:53:52,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 412 [2023-08-29 21:53:52,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 101 transitions, 815 flow. Second operand has 29 states, 29 states have (on average 167.41379310344828) internal successors, (4855), 29 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:53:52,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:53:52,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 412 [2023-08-29 21:53:52,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:54:04,676 INFO L130 PetriNetUnfolder]: 416/1306 cut-off events. [2023-08-29 21:54:04,676 INFO L131 PetriNetUnfolder]: For 3478/3478 co-relation queries the response was YES. [2023-08-29 21:54:04,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 1306 events. 416/1306 cut-off events. For 3478/3478 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7361 event pairs, 85 based on Foata normal form. 40/1344 useless extension candidates. Maximal degree in co-relation 5099. Up to 225 conditions per place. [2023-08-29 21:54:04,684 INFO L137 encePairwiseOnDemand]: 405/412 looper letters, 0 selfloop transitions, 0 changer transitions 339/339 dead transitions. [2023-08-29 21:54:04,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 339 transitions, 3240 flow [2023-08-29 21:54:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 21:54:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 21:54:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2252 transitions. [2023-08-29 21:54:04,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42046303211351754 [2023-08-29 21:54:04,691 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2252 transitions. [2023-08-29 21:54:04,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2252 transitions. [2023-08-29 21:54:04,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:54:04,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2252 transitions. [2023-08-29 21:54:04,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 173.23076923076923) internal successors, (2252), 13 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:04,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:04,705 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:04,705 INFO L175 Difference]: Start difference. First operand has 100 places, 101 transitions, 815 flow. Second operand 13 states and 2252 transitions. [2023-08-29 21:54:04,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 339 transitions, 3240 flow [2023-08-29 21:54:04,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 339 transitions, 3073 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-29 21:54:04,721 INFO L231 Difference]: Finished difference. Result has 100 places, 0 transitions, 0 flow [2023-08-29 21:54:04,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=100, PETRI_TRANSITIONS=0} [2023-08-29 21:54:04,721 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 27 predicate places. [2023-08-29 21:54:04,721 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 0 transitions, 0 flow [2023-08-29 21:54:04,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 167.41379310344828) internal successors, (4855), 29 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:04,725 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 38 remaining) [2023-08-29 21:54:04,726 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 38 remaining) [2023-08-29 21:54:04,726 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 38 remaining) [2023-08-29 21:54:04,726 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 38 remaining) [2023-08-29 21:54:04,726 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 38 remaining) [2023-08-29 21:54:04,726 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 38 remaining) [2023-08-29 21:54:04,726 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 38 remaining) [2023-08-29 21:54:04,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (30 of 38 remaining) [2023-08-29 21:54:04,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 38 remaining) [2023-08-29 21:54:04,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 38 remaining) [2023-08-29 21:54:04,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 38 remaining) [2023-08-29 21:54:04,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 38 remaining) [2023-08-29 21:54:04,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 38 remaining) [2023-08-29 21:54:04,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 38 remaining) [2023-08-29 21:54:04,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 38 remaining) [2023-08-29 21:54:04,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 38 remaining) [2023-08-29 21:54:04,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 38 remaining) [2023-08-29 21:54:04,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 38 remaining) [2023-08-29 21:54:04,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 38 remaining) [2023-08-29 21:54:04,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 38 remaining) [2023-08-29 21:54:04,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 38 remaining) [2023-08-29 21:54:04,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 38 remaining) [2023-08-29 21:54:04,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 38 remaining) [2023-08-29 21:54:04,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 38 remaining) [2023-08-29 21:54:04,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 38 remaining) [2023-08-29 21:54:04,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 38 remaining) [2023-08-29 21:54:04,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 38 remaining) [2023-08-29 21:54:04,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 38 remaining) [2023-08-29 21:54:04,730 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 38 remaining) [2023-08-29 21:54:04,730 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 38 remaining) [2023-08-29 21:54:04,730 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (7 of 38 remaining) [2023-08-29 21:54:04,730 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 38 remaining) [2023-08-29 21:54:04,730 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 38 remaining) [2023-08-29 21:54:04,730 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 38 remaining) [2023-08-29 21:54:04,730 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (3 of 38 remaining) [2023-08-29 21:54:04,731 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 38 remaining) [2023-08-29 21:54:04,731 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 38 remaining) [2023-08-29 21:54:04,731 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 38 remaining) [2023-08-29 21:54:04,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 21:54:04,937 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 [2023-08-29 21:54:04,938 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:54:04,939 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:54:04,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 220 transitions, 448 flow [2023-08-29 21:54:04,974 INFO L130 PetriNetUnfolder]: 49/318 cut-off events. [2023-08-29 21:54:04,975 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:54:04,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 49/318 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1325 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 182. Up to 8 conditions per place. [2023-08-29 21:54:04,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 220 transitions, 448 flow [2023-08-29 21:54:04,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 215 transitions, 435 flow [2023-08-29 21:54:04,978 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:54:04,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 215 transitions, 435 flow [2023-08-29 21:54:04,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 215 transitions, 435 flow [2023-08-29 21:54:04,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 215 transitions, 435 flow [2023-08-29 21:54:05,001 INFO L130 PetriNetUnfolder]: 48/313 cut-off events. [2023-08-29 21:54:05,002 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:54:05,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 313 events. 48/313 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1266 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 182. Up to 8 conditions per place. [2023-08-29 21:54:05,010 INFO L119 LiptonReduction]: Number of co-enabled transitions 16432 [2023-08-29 21:54:46,221 INFO L134 LiptonReduction]: Checked pairs total: 30320 [2023-08-29 21:54:46,221 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-29 21:54:46,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:54:46,222 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;@664b18d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:54:46,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:54:46,226 INFO L130 PetriNetUnfolder]: 11/55 cut-off events. [2023-08-29 21:54:46,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:54:46,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:54:46,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-29 21:54:46,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:54:46,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:54:46,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1837436753, now seen corresponding path program 1 times [2023-08-29 21:54:46,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:54:46,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109126986] [2023-08-29 21:54:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:54:46,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:54:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:54:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:54:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:54:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109126986] [2023-08-29 21:54:46,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109126986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:54:46,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:54:46,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:54:46,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918561419] [2023-08-29 21:54:46,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:54:46,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:54:46,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:54:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:54:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:54:46,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 411 [2023-08-29 21:54:46,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:46,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:54:46,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 411 [2023-08-29 21:54:46,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:54:47,419 INFO L130 PetriNetUnfolder]: 617/1369 cut-off events. [2023-08-29 21:54:47,420 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:54:47,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2541 conditions, 1369 events. 617/1369 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8410 event pairs, 520 based on Foata normal form. 98/1031 useless extension candidates. Maximal degree in co-relation 2465. Up to 1165 conditions per place. [2023-08-29 21:54:47,423 INFO L137 encePairwiseOnDemand]: 379/411 looper letters, 29 selfloop transitions, 2 changer transitions 27/66 dead transitions. [2023-08-29 21:54:47,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 243 flow [2023-08-29 21:54:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:54:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:54:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2023-08-29 21:54:47,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174371451743714 [2023-08-29 21:54:47,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2023-08-29 21:54:47,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2023-08-29 21:54:47,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:54:47,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2023-08-29 21:54:47,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:47,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:47,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:47,429 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 193 flow. Second operand 3 states and 638 transitions. [2023-08-29 21:54:47,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 243 flow [2023-08-29 21:54:47,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:54:47,431 INFO L231 Difference]: Finished difference. Result has 66 places, 39 transitions, 93 flow [2023-08-29 21:54:47,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=66, PETRI_TRANSITIONS=39} [2023-08-29 21:54:47,431 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-08-29 21:54:47,432 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 39 transitions, 93 flow [2023-08-29 21:54:47,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:47,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:54:47,432 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:54:47,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:54:47,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:54:47,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:54:47,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1059947768, now seen corresponding path program 1 times [2023-08-29 21:54:47,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:54:47,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074351277] [2023-08-29 21:54:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:54:47,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:54:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:54:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:54:47,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:54:47,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074351277] [2023-08-29 21:54:47,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074351277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:54:47,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608033412] [2023-08-29 21:54:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:54:47,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:54:47,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:54:47,593 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:54:47,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 21:54:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:54:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:54:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:54:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:54:47,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:54:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:54:47,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608033412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:54:47,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:54:47,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:54:47,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482631874] [2023-08-29 21:54:47,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:54:47,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:54:47,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:54:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:54:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:54:48,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 411 [2023-08-29 21:54:48,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 39 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 185.57142857142858) internal successors, (1299), 7 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:48,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:54:48,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 411 [2023-08-29 21:54:48,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:54:48,934 INFO L130 PetriNetUnfolder]: 113/287 cut-off events. [2023-08-29 21:54:48,934 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:54:48,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 287 events. 113/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1191 event pairs, 100 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 535. Up to 240 conditions per place. [2023-08-29 21:54:48,938 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 29 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-08-29 21:54:48,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 173 flow [2023-08-29 21:54:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:54:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:54:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1141 transitions. [2023-08-29 21:54:48,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626926196269262 [2023-08-29 21:54:48,945 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1141 transitions. [2023-08-29 21:54:48,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1141 transitions. [2023-08-29 21:54:48,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:54:48,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1141 transitions. [2023-08-29 21:54:48,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.16666666666666) internal successors, (1141), 6 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:48,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:48,952 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:48,952 INFO L175 Difference]: Start difference. First operand has 66 places, 39 transitions, 93 flow. Second operand 6 states and 1141 transitions. [2023-08-29 21:54:48,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 173 flow [2023-08-29 21:54:48,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 169 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:54:48,953 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 125 flow [2023-08-29 21:54:48,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-29 21:54:48,954 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -23 predicate places. [2023-08-29 21:54:48,954 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 125 flow [2023-08-29 21:54:48,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 185.57142857142858) internal successors, (1299), 7 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:48,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:54:48,955 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-29 21:54:48,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 21:54:49,159 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 [2023-08-29 21:54:49,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:54:49,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:54:49,160 INFO L85 PathProgramCache]: Analyzing trace with hash 825704175, now seen corresponding path program 2 times [2023-08-29 21:54:49,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:54:49,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079249178] [2023-08-29 21:54:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:54:49,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:54:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:54:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:54:49,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:54:49,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079249178] [2023-08-29 21:54:49,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079249178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:54:49,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165756599] [2023-08-29 21:54:49,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:54:49,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:54:49,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:54:49,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:54:49,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 21:54:49,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:54:49,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:54:49,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:54:49,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:54:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:54:49,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:54:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:54:50,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165756599] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:54:50,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:54:50,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 21:54:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211295870] [2023-08-29 21:54:50,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:54:50,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:54:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:54:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:54:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:54:50,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 411 [2023-08-29 21:54:50,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 125 flow. Second operand has 13 states, 13 states have (on average 185.30769230769232) internal successors, (2409), 13 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:50,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:54:50,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 411 [2023-08-29 21:54:50,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:54:52,570 INFO L130 PetriNetUnfolder]: 113/293 cut-off events. [2023-08-29 21:54:52,571 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-29 21:54:52,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 293 events. 113/293 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1195 event pairs, 100 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 526. Up to 240 conditions per place. [2023-08-29 21:54:52,572 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 29 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-08-29 21:54:52,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 241 flow [2023-08-29 21:54:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:54:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:54:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2254 transitions. [2023-08-29 21:54:52,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570154095701541 [2023-08-29 21:54:52,575 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2254 transitions. [2023-08-29 21:54:52,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2254 transitions. [2023-08-29 21:54:52,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:54:52,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2254 transitions. [2023-08-29 21:54:52,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.83333333333334) internal successors, (2254), 12 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:52,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:52,584 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:52,585 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 125 flow. Second operand 12 states and 2254 transitions. [2023-08-29 21:54:52,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 241 flow [2023-08-29 21:54:52,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 227 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 21:54:52,586 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 195 flow [2023-08-29 21:54:52,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=195, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-08-29 21:54:52,587 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-29 21:54:52,587 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 195 flow [2023-08-29 21:54:52,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.30769230769232) internal successors, (2409), 13 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:54:52,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:54:52,587 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-29 21:54:52,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 21:54:52,793 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 [2023-08-29 21:54:52,793 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:54:52,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:54:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1067882575, now seen corresponding path program 3 times [2023-08-29 21:54:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:54:52,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213314340] [2023-08-29 21:54:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:54:52,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:54:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:54:52,808 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:54:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:54:52,840 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:54:52,840 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:54:52,841 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:54:52,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 21:54:52,841 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-29 21:54:52,842 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:54:52,843 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:54:52,843 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:54:52,880 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:54:52,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 301 transitions, 620 flow [2023-08-29 21:54:52,943 INFO L130 PetriNetUnfolder]: 82/526 cut-off events. [2023-08-29 21:54:52,944 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:54:52,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 526 events. 82/526 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2615 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-08-29 21:54:52,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 301 transitions, 620 flow [2023-08-29 21:54:52,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 301 transitions, 620 flow [2023-08-29 21:54:52,955 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:54:52,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 301 transitions, 620 flow [2023-08-29 21:54:52,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 301 transitions, 620 flow [2023-08-29 21:54:52,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 301 transitions, 620 flow [2023-08-29 21:54:52,998 INFO L130 PetriNetUnfolder]: 82/526 cut-off events. [2023-08-29 21:54:52,999 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:54:53,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 526 events. 82/526 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2615 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-08-29 21:54:53,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 47084 [2023-08-29 21:55:48,817 INFO L134 LiptonReduction]: Checked pairs total: 96680 [2023-08-29 21:55:48,817 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-29 21:55:48,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:55:48,819 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;@664b18d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:55:48,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-08-29 21:55:48,820 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-29 21:55:48,820 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:55:48,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:55:48,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:55:48,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:55:48,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:55:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1702346, now seen corresponding path program 1 times [2023-08-29 21:55:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:55:48,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133279520] [2023-08-29 21:55:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:55:48,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:55:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:55:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:55:48,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:55:48,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133279520] [2023-08-29 21:55:48,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133279520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:55:48,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:55:48,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:55:48,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346221439] [2023-08-29 21:55:48,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:55:48,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:55:48,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:55:48,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:55:48,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:55:48,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 567 [2023-08-29 21:55:48,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:55:48,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:55:48,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 567 [2023-08-29 21:55:48,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:55:53,521 INFO L130 PetriNetUnfolder]: 31460/50386 cut-off events. [2023-08-29 21:55:53,521 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2023-08-29 21:55:53,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95798 conditions, 50386 events. 31460/50386 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 1857. Compared 412607 event pairs, 28000 based on Foata normal form. 3730/36598 useless extension candidates. Maximal degree in co-relation 38606. Up to 45273 conditions per place. [2023-08-29 21:55:53,815 INFO L137 encePairwiseOnDemand]: 524/567 looper letters, 81 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2023-08-29 21:55:53,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 103 transitions, 390 flow [2023-08-29 21:55:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:55:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:55:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-08-29 21:55:53,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155790711346266 [2023-08-29 21:55:53,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-08-29 21:55:53,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-08-29 21:55:53,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:55:53,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-08-29 21:55:53,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:55:53,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:55:53,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:55:53,824 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 302 flow. Second operand 3 states and 877 transitions. [2023-08-29 21:55:53,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 103 transitions, 390 flow [2023-08-29 21:55:53,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:55:53,826 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 234 flow [2023-08-29 21:55:53,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2023-08-29 21:55:53,827 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -5 predicate places. [2023-08-29 21:55:53,827 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 234 flow [2023-08-29 21:55:53,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:55:53,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:55:53,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:55:53,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:55:53,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:55:53,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:55:53,829 INFO L85 PathProgramCache]: Analyzing trace with hash 52784301, now seen corresponding path program 1 times [2023-08-29 21:55:53,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:55:53,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501836054] [2023-08-29 21:55:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:55:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:55:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:55:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:55:54,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:55:54,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501836054] [2023-08-29 21:55:54,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501836054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:55:54,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992489659] [2023-08-29 21:55:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:55:54,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:55:54,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:55:54,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:55:54,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 21:55:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:55:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:55:54,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:55:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:55:54,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:55:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:55:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992489659] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:55:54,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:55:54,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:55:54,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764715932] [2023-08-29 21:55:54,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:55:54,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:55:54,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:55:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:55:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:55:54,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-29 21:55:54,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 251.28571428571428) internal successors, (1759), 7 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:55:54,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:55:54,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-29 21:55:54,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:55:59,757 INFO L130 PetriNetUnfolder]: 31460/50389 cut-off events. [2023-08-29 21:55:59,757 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2023-08-29 21:55:59,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95814 conditions, 50389 events. 31460/50389 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 1857. Compared 412605 event pairs, 28000 based on Foata normal form. 0/32871 useless extension candidates. Maximal degree in co-relation 95801. Up to 45273 conditions per place. [2023-08-29 21:56:00,270 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 81 selfloop transitions, 5 changer transitions 0/106 dead transitions. [2023-08-29 21:56:00,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 106 transitions, 418 flow [2023-08-29 21:56:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:56:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:56:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1589 transitions. [2023-08-29 21:56:00,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670781893004115 [2023-08-29 21:56:00,273 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1589 transitions. [2023-08-29 21:56:00,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1589 transitions. [2023-08-29 21:56:00,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:56:00,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1589 transitions. [2023-08-29 21:56:00,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 264.8333333333333) internal successors, (1589), 6 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:00,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:00,284 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:00,284 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 234 flow. Second operand 6 states and 1589 transitions. [2023-08-29 21:56:00,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 106 transitions, 418 flow [2023-08-29 21:56:00,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 414 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:56:00,286 INFO L231 Difference]: Finished difference. Result has 108 places, 106 transitions, 266 flow [2023-08-29 21:56:00,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=108, PETRI_TRANSITIONS=106} [2023-08-29 21:56:00,287 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 2 predicate places. [2023-08-29 21:56:00,287 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 106 transitions, 266 flow [2023-08-29 21:56:00,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 251.28571428571428) internal successors, (1759), 7 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:00,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:56:00,288 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-29 21:56:00,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-29 21:56:00,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:56:00,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:56:00,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:56:00,494 INFO L85 PathProgramCache]: Analyzing trace with hash 550574730, now seen corresponding path program 2 times [2023-08-29 21:56:00,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:56:00,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120702189] [2023-08-29 21:56:00,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:56:00,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:56:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:56:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:56:00,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:56:00,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120702189] [2023-08-29 21:56:00,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120702189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:56:00,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:56:00,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:56:00,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448109147] [2023-08-29 21:56:00,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:56:00,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:56:00,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:56:00,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:56:00,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:56:01,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 567 [2023-08-29 21:56:01,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 106 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:01,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:56:01,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 567 [2023-08-29 21:56:01,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:56:05,132 INFO L130 PetriNetUnfolder]: 29290/46699 cut-off events. [2023-08-29 21:56:05,132 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2023-08-29 21:56:05,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89103 conditions, 46699 events. 29290/46699 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 380060 event pairs, 24164 based on Foata normal form. 0/30916 useless extension candidates. Maximal degree in co-relation 89068. Up to 39160 conditions per place. [2023-08-29 21:56:05,356 INFO L137 encePairwiseOnDemand]: 562/567 looper letters, 125 selfloop transitions, 3 changer transitions 0/148 dead transitions. [2023-08-29 21:56:05,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 148 transitions, 606 flow [2023-08-29 21:56:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:56:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:56:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-08-29 21:56:05,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097001763668431 [2023-08-29 21:56:05,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-08-29 21:56:05,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-08-29 21:56:05,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:56:05,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-08-29 21:56:05,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:05,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:05,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:05,362 INFO L175 Difference]: Start difference. First operand has 108 places, 106 transitions, 266 flow. Second operand 3 states and 867 transitions. [2023-08-29 21:56:05,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 148 transitions, 606 flow [2023-08-29 21:56:05,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 148 transitions, 592 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 21:56:05,364 INFO L231 Difference]: Finished difference. Result has 107 places, 104 transitions, 254 flow [2023-08-29 21:56:05,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=107, PETRI_TRANSITIONS=104} [2023-08-29 21:56:05,365 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 1 predicate places. [2023-08-29 21:56:05,365 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 104 transitions, 254 flow [2023-08-29 21:56:05,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:05,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:56:05,366 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-29 21:56:05,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 21:56:05,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:56:05,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:56:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash 550574729, now seen corresponding path program 1 times [2023-08-29 21:56:05,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:56:05,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127638698] [2023-08-29 21:56:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:56:05,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:56:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:56:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:56:05,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:56:05,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127638698] [2023-08-29 21:56:05,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127638698] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:56:05,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307398172] [2023-08-29 21:56:05,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:56:05,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:56:05,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:56:05,805 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:56:05,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 21:56:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:56:05,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:56:05,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:56:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:56:06,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:56:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:56:06,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307398172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:56:06,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:56:06,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 21:56:06,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730860280] [2023-08-29 21:56:06,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:56:06,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:56:06,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:56:06,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:56:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:56:07,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-29 21:56:07,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 104 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 251.15384615384616) internal successors, (3265), 13 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:07,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:56:07,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-29 21:56:07,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:56:12,297 INFO L130 PetriNetUnfolder]: 29376/47035 cut-off events. [2023-08-29 21:56:12,298 INFO L131 PetriNetUnfolder]: For 736/736 co-relation queries the response was YES. [2023-08-29 21:56:12,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90508 conditions, 47035 events. 29376/47035 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 1752. Compared 382413 event pairs, 26092 based on Foata normal form. 6/31810 useless extension candidates. Maximal degree in co-relation 90455. Up to 42239 conditions per place. [2023-08-29 21:56:12,575 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 79 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2023-08-29 21:56:12,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 110 transitions, 470 flow [2023-08-29 21:56:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:56:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:56:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3096 transitions. [2023-08-29 21:56:12,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2023-08-29 21:56:12,580 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3096 transitions. [2023-08-29 21:56:12,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3096 transitions. [2023-08-29 21:56:12,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:56:12,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3096 transitions. [2023-08-29 21:56:12,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:12,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:12,590 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:12,591 INFO L175 Difference]: Start difference. First operand has 107 places, 104 transitions, 254 flow. Second operand 12 states and 3096 transitions. [2023-08-29 21:56:12,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 110 transitions, 470 flow [2023-08-29 21:56:12,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 110 transitions, 464 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:56:12,600 INFO L231 Difference]: Finished difference. Result has 122 places, 110 transitions, 332 flow [2023-08-29 21:56:12,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=122, PETRI_TRANSITIONS=110} [2023-08-29 21:56:12,601 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 16 predicate places. [2023-08-29 21:56:12,601 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 110 transitions, 332 flow [2023-08-29 21:56:12,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 251.15384615384616) internal successors, (3265), 13 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:12,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:56:12,602 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-29 21:56:12,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-29 21:56:12,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-29 21:56:12,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:56:12,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:56:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 545642409, now seen corresponding path program 2 times [2023-08-29 21:56:12,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:56:12,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376340716] [2023-08-29 21:56:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:56:12,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:56:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:56:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:56:13,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:56:13,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376340716] [2023-08-29 21:56:13,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376340716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:56:13,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:56:13,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:56:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873650200] [2023-08-29 21:56:13,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:56:13,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:56:13,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:56:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:56:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:56:13,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-29 21:56:13,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 110 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:13,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:56:13,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-29 21:56:13,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:56:17,925 INFO L130 PetriNetUnfolder]: 29001/46982 cut-off events. [2023-08-29 21:56:17,926 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-29 21:56:18,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89434 conditions, 46982 events. 29001/46982 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 1758. Compared 391231 event pairs, 12540 based on Foata normal form. 0/31169 useless extension candidates. Maximal degree in co-relation 89357. Up to 42201 conditions per place. [2023-08-29 21:56:18,197 INFO L137 encePairwiseOnDemand]: 563/567 looper letters, 113 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2023-08-29 21:56:18,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 135 transitions, 612 flow [2023-08-29 21:56:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:56:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:56:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 857 transitions. [2023-08-29 21:56:18,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038212815990594 [2023-08-29 21:56:18,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 857 transitions. [2023-08-29 21:56:18,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 857 transitions. [2023-08-29 21:56:18,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:56:18,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 857 transitions. [2023-08-29 21:56:18,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:18,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:18,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:18,206 INFO L175 Difference]: Start difference. First operand has 122 places, 110 transitions, 332 flow. Second operand 3 states and 857 transitions. [2023-08-29 21:56:18,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 135 transitions, 612 flow [2023-08-29 21:56:18,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 135 transitions, 564 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-29 21:56:18,209 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 298 flow [2023-08-29 21:56:18,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2023-08-29 21:56:18,210 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 14 predicate places. [2023-08-29 21:56:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 298 flow [2023-08-29 21:56:18,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:18,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:56:18,210 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:56:18,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 21:56:18,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:56:18,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:56:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 932777554, now seen corresponding path program 1 times [2023-08-29 21:56:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:56:18,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504760499] [2023-08-29 21:56:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:56:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:56:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:56:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:56:18,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:56:18,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504760499] [2023-08-29 21:56:18,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504760499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:56:18,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499474566] [2023-08-29 21:56:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:56:18,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:56:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:56:18,553 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:56:18,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 21:56:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:56:18,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:56:18,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:56:18,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:56:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:56:19,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:56:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:56:19,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499474566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:56:19,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:56:19,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:56:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274156968] [2023-08-29 21:56:19,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:56:19,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:56:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:56:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:56:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:56:23,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 567 [2023-08-29 21:56:23,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:23,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:56:23,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 567 [2023-08-29 21:56:23,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:56:29,684 INFO L130 PetriNetUnfolder]: 26925/42944 cut-off events. [2023-08-29 21:56:29,684 INFO L131 PetriNetUnfolder]: For 1125/1125 co-relation queries the response was YES. [2023-08-29 21:56:29,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84891 conditions, 42944 events. 26925/42944 cut-off events. For 1125/1125 co-relation queries the response was YES. Maximal size of possible extension queue 1603. Compared 351653 event pairs, 1 based on Foata normal form. 23/29464 useless extension candidates. Maximal degree in co-relation 84837. Up to 35616 conditions per place. [2023-08-29 21:56:29,919 INFO L137 encePairwiseOnDemand]: 561/567 looper letters, 198 selfloop transitions, 5 changer transitions 0/223 dead transitions. [2023-08-29 21:56:29,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 223 transitions, 926 flow [2023-08-29 21:56:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:56:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:56:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1431 transitions. [2023-08-29 21:56:29,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2023-08-29 21:56:29,922 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1431 transitions. [2023-08-29 21:56:29,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1431 transitions. [2023-08-29 21:56:29,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:56:29,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1431 transitions. [2023-08-29 21:56:29,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.2) internal successors, (1431), 5 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:29,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:29,927 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:29,927 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 298 flow. Second operand 5 states and 1431 transitions. [2023-08-29 21:56:29,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 223 transitions, 926 flow [2023-08-29 21:56:29,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 223 transitions, 924 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:56:29,932 INFO L231 Difference]: Finished difference. Result has 123 places, 110 transitions, 306 flow [2023-08-29 21:56:29,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=123, PETRI_TRANSITIONS=110} [2023-08-29 21:56:29,933 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 17 predicate places. [2023-08-29 21:56:29,933 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 110 transitions, 306 flow [2023-08-29 21:56:29,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:29,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:56:29,933 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:56:29,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-29 21:56:30,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-29 21:56:30,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:56:30,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:56:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1136546390, now seen corresponding path program 1 times [2023-08-29 21:56:30,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:56:30,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426801099] [2023-08-29 21:56:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:56:30,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:56:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:56:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:56:31,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:56:31,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426801099] [2023-08-29 21:56:31,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426801099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:56:31,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:56:31,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 21:56:31,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617375020] [2023-08-29 21:56:31,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:56:31,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:56:31,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:56:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:56:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:56:37,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 567 [2023-08-29 21:56:37,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 110 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 238.28571428571428) internal successors, (1668), 7 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:37,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:56:37,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 567 [2023-08-29 21:56:37,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:56:47,941 INFO L130 PetriNetUnfolder]: 51435/80660 cut-off events. [2023-08-29 21:56:47,941 INFO L131 PetriNetUnfolder]: For 6907/6907 co-relation queries the response was YES. [2023-08-29 21:56:48,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161958 conditions, 80660 events. 51435/80660 cut-off events. For 6907/6907 co-relation queries the response was YES. Maximal size of possible extension queue 2745. Compared 695222 event pairs, 22481 based on Foata normal form. 1152/57155 useless extension candidates. Maximal degree in co-relation 161903. Up to 36723 conditions per place. [2023-08-29 21:56:48,435 INFO L137 encePairwiseOnDemand]: 556/567 looper letters, 376 selfloop transitions, 18 changer transitions 0/414 dead transitions. [2023-08-29 21:56:48,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 414 transitions, 1783 flow [2023-08-29 21:56:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 21:56:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 21:56:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2758 transitions. [2023-08-29 21:56:48,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48641975308641977 [2023-08-29 21:56:48,438 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2758 transitions. [2023-08-29 21:56:48,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2758 transitions. [2023-08-29 21:56:48,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:56:48,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2758 transitions. [2023-08-29 21:56:48,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 275.8) internal successors, (2758), 10 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:48,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 567.0) internal successors, (6237), 11 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:48,444 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 567.0) internal successors, (6237), 11 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:48,445 INFO L175 Difference]: Start difference. First operand has 123 places, 110 transitions, 306 flow. Second operand 10 states and 2758 transitions. [2023-08-29 21:56:48,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 414 transitions, 1783 flow [2023-08-29 21:56:48,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 414 transitions, 1749 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 21:56:48,460 INFO L231 Difference]: Finished difference. Result has 133 places, 124 transitions, 400 flow [2023-08-29 21:56:48,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=400, PETRI_PLACES=133, PETRI_TRANSITIONS=124} [2023-08-29 21:56:48,460 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 27 predicate places. [2023-08-29 21:56:48,460 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 124 transitions, 400 flow [2023-08-29 21:56:48,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.28571428571428) internal successors, (1668), 7 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:48,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:56:48,461 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:56:48,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 21:56:48,461 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:56:48,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:56:48,462 INFO L85 PathProgramCache]: Analyzing trace with hash -873202331, now seen corresponding path program 1 times [2023-08-29 21:56:48,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:56:48,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105710774] [2023-08-29 21:56:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:56:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:56:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:56:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:56:48,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:56:48,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105710774] [2023-08-29 21:56:48,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105710774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:56:48,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:56:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:56:48,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830284969] [2023-08-29 21:56:48,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:56:48,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:56:48,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:56:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:56:48,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:56:51,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 567 [2023-08-29 21:56:51,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 124 transitions, 400 flow. Second operand has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:51,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:56:51,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 567 [2023-08-29 21:56:51,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:56:58,756 INFO L130 PetriNetUnfolder]: 42711/68149 cut-off events. [2023-08-29 21:56:58,757 INFO L131 PetriNetUnfolder]: For 13116/13116 co-relation queries the response was YES. [2023-08-29 21:56:59,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147740 conditions, 68149 events. 42711/68149 cut-off events. For 13116/13116 co-relation queries the response was YES. Maximal size of possible extension queue 2379. Compared 595948 event pairs, 1491 based on Foata normal form. 0/52098 useless extension candidates. Maximal degree in co-relation 147680. Up to 53315 conditions per place. [2023-08-29 21:56:59,425 INFO L137 encePairwiseOnDemand]: 552/567 looper letters, 208 selfloop transitions, 20 changer transitions 0/247 dead transitions. [2023-08-29 21:56:59,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 247 transitions, 1163 flow [2023-08-29 21:56:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:56:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:56:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1391 transitions. [2023-08-29 21:56:59,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49065255731922397 [2023-08-29 21:56:59,427 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1391 transitions. [2023-08-29 21:56:59,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1391 transitions. [2023-08-29 21:56:59,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:56:59,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1391 transitions. [2023-08-29 21:56:59,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:59,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:59,431 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:59,432 INFO L175 Difference]: Start difference. First operand has 133 places, 124 transitions, 400 flow. Second operand 5 states and 1391 transitions. [2023-08-29 21:56:59,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 247 transitions, 1163 flow [2023-08-29 21:56:59,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 247 transitions, 1162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:56:59,762 INFO L231 Difference]: Finished difference. Result has 139 places, 134 transitions, 533 flow [2023-08-29 21:56:59,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=533, PETRI_PLACES=139, PETRI_TRANSITIONS=134} [2023-08-29 21:56:59,762 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 33 predicate places. [2023-08-29 21:56:59,762 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 134 transitions, 533 flow [2023-08-29 21:56:59,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:56:59,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:56:59,762 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:56:59,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 21:56:59,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:56:59,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:56:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash -873201949, now seen corresponding path program 1 times [2023-08-29 21:56:59,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:56:59,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000645281] [2023-08-29 21:56:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:56:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:56:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:57:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:57:00,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:57:00,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000645281] [2023-08-29 21:57:00,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000645281] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:57:00,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:57:00,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:57:00,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997158570] [2023-08-29 21:57:00,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:57:00,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:57:00,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:57:00,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:57:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:57:04,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 567 [2023-08-29 21:57:04,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 533 flow. Second operand has 6 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:57:04,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:57:04,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 567 [2023-08-29 21:57:04,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:57:19,496 INFO L130 PetriNetUnfolder]: 80029/127152 cut-off events. [2023-08-29 21:57:19,496 INFO L131 PetriNetUnfolder]: For 56111/56551 co-relation queries the response was YES. [2023-08-29 21:57:20,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304172 conditions, 127152 events. 80029/127152 cut-off events. For 56111/56551 co-relation queries the response was YES. Maximal size of possible extension queue 4138. Compared 1152095 event pairs, 12994 based on Foata normal form. 90/96895 useless extension candidates. Maximal degree in co-relation 304108. Up to 65053 conditions per place. [2023-08-29 21:57:20,471 INFO L137 encePairwiseOnDemand]: 554/567 looper letters, 324 selfloop transitions, 52 changer transitions 0/396 dead transitions. [2023-08-29 21:57:20,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 396 transitions, 2241 flow [2023-08-29 21:57:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:57:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:57:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1969 transitions. [2023-08-29 21:57:20,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4960947341899723 [2023-08-29 21:57:20,473 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1969 transitions. [2023-08-29 21:57:20,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1969 transitions. [2023-08-29 21:57:20,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:57:20,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1969 transitions. [2023-08-29 21:57:20,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 281.2857142857143) internal successors, (1969), 7 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:57:20,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:57:20,477 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:57:20,477 INFO L175 Difference]: Start difference. First operand has 139 places, 134 transitions, 533 flow. Second operand 7 states and 1969 transitions. [2023-08-29 21:57:20,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 396 transitions, 2241 flow [2023-08-29 21:57:21,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 396 transitions, 2241 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:57:21,337 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 1074 flow [2023-08-29 21:57:21,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1074, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2023-08-29 21:57:21,338 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 44 predicate places. [2023-08-29 21:57:21,338 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 1074 flow [2023-08-29 21:57:21,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:57:21,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:57:21,339 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:57:21,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 21:57:21,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:57:21,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:57:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1596614378, now seen corresponding path program 1 times [2023-08-29 21:57:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:57:21,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10048725] [2023-08-29 21:57:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:57:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:57:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:57:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-29 21:57:22,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:57:22,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10048725] [2023-08-29 21:57:22,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10048725] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:57:22,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837445988] [2023-08-29 21:57:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:57:22,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:57:22,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:57:22,452 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:57:22,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-29 21:57:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:57:22,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 21:57:22,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:57:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:57:23,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:57:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-29 21:57:24,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:57:24,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837445988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:57:24,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:57:24,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-29 21:57:24,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706367218] [2023-08-29 21:57:24,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:57:24,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:57:24,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:57:24,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:57:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-29 21:57:28,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 567 [2023-08-29 21:57:28,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 184 transitions, 1074 flow. Second operand has 6 states, 6 states have (on average 242.83333333333334) internal successors, (1457), 6 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:57:28,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:57:28,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 567 [2023-08-29 21:57:28,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:57:56,954 INFO L130 PetriNetUnfolder]: 150505/249165 cut-off events. [2023-08-29 21:57:56,954 INFO L131 PetriNetUnfolder]: For 244517/244617 co-relation queries the response was YES. [2023-08-29 21:57:58,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655142 conditions, 249165 events. 150505/249165 cut-off events. For 244517/244617 co-relation queries the response was YES. Maximal size of possible extension queue 8585. Compared 2563596 event pairs, 59443 based on Foata normal form. 3260/202683 useless extension candidates. Maximal degree in co-relation 655071. Up to 115890 conditions per place. [2023-08-29 21:57:59,412 INFO L137 encePairwiseOnDemand]: 550/567 looper letters, 616 selfloop transitions, 122 changer transitions 0/758 dead transitions. [2023-08-29 21:57:59,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 758 transitions, 6216 flow [2023-08-29 21:57:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 21:57:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 21:57:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2799 transitions. [2023-08-29 21:57:59,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4936507936507937 [2023-08-29 21:57:59,416 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2799 transitions. [2023-08-29 21:57:59,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2799 transitions. [2023-08-29 21:57:59,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:57:59,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2799 transitions. [2023-08-29 21:57:59,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 279.9) internal successors, (2799), 10 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:57:59,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 567.0) internal successors, (6237), 11 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:57:59,423 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 567.0) internal successors, (6237), 11 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:57:59,424 INFO L175 Difference]: Start difference. First operand has 150 places, 184 transitions, 1074 flow. Second operand 10 states and 2799 transitions. [2023-08-29 21:57:59,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 758 transitions, 6216 flow [2023-08-29 21:58:00,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 758 transitions, 6216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:58:00,548 INFO L231 Difference]: Finished difference. Result has 163 places, 279 transitions, 2492 flow [2023-08-29 21:58:00,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2492, PETRI_PLACES=163, PETRI_TRANSITIONS=279} [2023-08-29 21:58:00,549 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 57 predicate places. [2023-08-29 21:58:00,549 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 279 transitions, 2492 flow [2023-08-29 21:58:00,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 242.83333333333334) internal successors, (1457), 6 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:58:00,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:58:00,554 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:58:00,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-29 21:58:00,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:58:00,760 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:58:00,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:58:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1966844072, now seen corresponding path program 1 times [2023-08-29 21:58:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:58:00,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761781458] [2023-08-29 21:58:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:58:00,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:58:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:58:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:58:01,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:58:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761781458] [2023-08-29 21:58:01,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761781458] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:58:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488472212] [2023-08-29 21:58:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:58:01,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:58:01,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:58:01,589 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:58:01,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-29 21:58:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:58:01,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 21:58:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:58:01,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-29 21:58:02,332 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 21:58:02,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 21:58:02,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 21:58:03,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2023-08-29 21:58:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:58:03,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:58:09,504 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset| Int) (v_ArrVal_1084 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1084) |c_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.base|) |t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset|) 0)) is different from false [2023-08-29 21:58:11,581 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset| Int) (v_ArrVal_1084 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1084) |c_~#cache~0.base|) |t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset|) 0)) is different from false [2023-08-29 21:58:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2023-08-29 21:58:12,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488472212] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:58:12,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:58:12,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 21:58:12,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926512032] [2023-08-29 21:58:12,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:58:12,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:58:12,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:58:12,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:58:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=81, Unknown=4, NotChecked=38, Total=156 [2023-08-29 21:58:12,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 567 [2023-08-29 21:58:12,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 279 transitions, 2492 flow. Second operand has 13 states, 13 states have (on average 186.6153846153846) internal successors, (2426), 13 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:58:12,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:58:12,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 567 [2023-08-29 21:58:12,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:58:54,848 INFO L130 PetriNetUnfolder]: 178455/282465 cut-off events. [2023-08-29 21:58:54,848 INFO L131 PetriNetUnfolder]: For 351178/351944 co-relation queries the response was YES. [2023-08-29 21:58:56,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837679 conditions, 282465 events. 178455/282465 cut-off events. For 351178/351944 co-relation queries the response was YES. Maximal size of possible extension queue 9014. Compared 2750211 event pairs, 37405 based on Foata normal form. 2807/241272 useless extension candidates. Maximal degree in co-relation 837602. Up to 149809 conditions per place. [2023-08-29 21:58:57,794 INFO L137 encePairwiseOnDemand]: 551/567 looper letters, 420 selfloop transitions, 101 changer transitions 0/536 dead transitions. [2023-08-29 21:58:57,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 536 transitions, 4814 flow [2023-08-29 21:58:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:58:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:58:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1586 transitions. [2023-08-29 21:58:57,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399596875787352 [2023-08-29 21:58:57,797 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1586 transitions. [2023-08-29 21:58:57,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1586 transitions. [2023-08-29 21:58:57,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:58:57,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1586 transitions. [2023-08-29 21:58:57,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 226.57142857142858) internal successors, (1586), 7 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:58:57,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:58:57,802 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:58:57,803 INFO L175 Difference]: Start difference. First operand has 163 places, 279 transitions, 2492 flow. Second operand 7 states and 1586 transitions. [2023-08-29 21:58:57,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 536 transitions, 4814 flow [2023-08-29 21:59:06,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 536 transitions, 4813 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:59:06,680 INFO L231 Difference]: Finished difference. Result has 170 places, 283 transitions, 2841 flow [2023-08-29 21:59:06,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=2491, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2841, PETRI_PLACES=170, PETRI_TRANSITIONS=283} [2023-08-29 21:59:06,681 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 64 predicate places. [2023-08-29 21:59:06,681 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 283 transitions, 2841 flow [2023-08-29 21:59:06,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 186.6153846153846) internal successors, (2426), 13 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:59:06,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:59:06,681 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:59:06,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-29 21:59:06,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-29 21:59:06,886 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 21:59:06,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:59:06,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1888698451, now seen corresponding path program 1 times [2023-08-29 21:59:06,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:59:06,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968342103] [2023-08-29 21:59:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:59:06,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:59:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:59:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-29 21:59:06,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:59:06,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968342103] [2023-08-29 21:59:06,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968342103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:59:06,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:59:06,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:59:06,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562932653] [2023-08-29 21:59:06,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:59:06,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:59:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:59:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:59:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:59:07,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-29 21:59:07,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 283 transitions, 2841 flow. Second operand has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:59:07,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:59:07,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-29 21:59:07,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand