./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c --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/weaver/mult-comm.wvr.c -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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --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 23:11:35,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:11:35,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:11:35,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:11:35,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:11:35,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:11:35,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:11:35,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:11:35,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:11:35,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:11:35,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:11:35,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:11:35,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:11:35,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:11:35,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:11:35,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:11:35,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:11:35,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:11:35,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:11:35,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:11:35,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:11:35,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:11:35,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:11:35,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:11:35,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:11:35,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:11:35,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:11:35,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:11:35,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:11:35,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:11:35,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:11:35,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:11:35,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:11:35,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:11:35,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:11:35,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:11:35,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:11:35,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:11:35,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:11:35,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:11:35,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:11:35,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:11:35,200 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:11:35,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:11:35,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:11:35,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:11:35,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:11:35,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:11:35,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:11:35,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:11:35,203 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:11:35,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:11:35,204 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:11:35,204 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:11:35,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:11:35,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:11:35,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:11:35,205 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:11:35,205 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:11:35,205 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:11:35,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:11:35,205 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:11:35,205 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:11:35,206 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:11:35,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:11:35,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:11:35,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:11:35,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:11:35,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:11:35,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:11:35,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:11:35,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:11:35,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:11:35,207 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:11:35,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:11:35,207 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:11:35,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:11:35,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:11:35,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:11:35,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:11:35,440 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:11:35,440 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:11:35,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-29 23:11:36,457 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:11:36,613 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:11:36,614 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-29 23:11:36,620 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ebe557c8/585d5315eb084e6c954d5b6ecb88e32a/FLAG01ee43502 [2023-08-29 23:11:36,632 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ebe557c8/585d5315eb084e6c954d5b6ecb88e32a [2023-08-29 23:11:36,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:11:36,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:11:36,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:11:36,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:11:36,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:11:36,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@147571f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36, skipping insertion in model container [2023-08-29 23:11:36,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:11:36,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:11:36,742 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1910,1923] [2023-08-29 23:11:36,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:11:36,751 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:11:36,762 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1910,1923] [2023-08-29 23:11:36,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:11:36,777 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:11:36,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36 WrapperNode [2023-08-29 23:11:36,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:11:36,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:11:36,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:11:36,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:11:36,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,787 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,797 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-08-29 23:11:36,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:11:36,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:11:36,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:11:36,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:11:36,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,810 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:11:36,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:11:36,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:11:36,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:11:36,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (1/1) ... [2023-08-29 23:11:36,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:11:36,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:36,847 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 23:11:36,851 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 23:11:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:11:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:11:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:11:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:11:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:11:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:11:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:11:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:11:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:11:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:11:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:11:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:11:36,870 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 23:11:36,925 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:11:36,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:11:37,095 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:11:37,100 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:11:37,100 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 23:11:37,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:11:37 BoogieIcfgContainer [2023-08-29 23:11:37,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:11:37,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:11:37,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:11:37,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:11:37,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:11:36" (1/3) ... [2023-08-29 23:11:37,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1735b16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:11:37, skipping insertion in model container [2023-08-29 23:11:37,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:11:36" (2/3) ... [2023-08-29 23:11:37,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1735b16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:11:37, skipping insertion in model container [2023-08-29 23:11:37,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:11:37" (3/3) ... [2023-08-29 23:11:37,107 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-08-29 23:11:37,118 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:11:37,118 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-29 23:11:37,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:11:37,172 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 23:11:37,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 89 transitions, 194 flow [2023-08-29 23:11:37,223 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2023-08-29 23:11:37,223 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:11:37,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 5/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-29 23:11:37,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 89 transitions, 194 flow [2023-08-29 23:11:37,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 83 transitions, 178 flow [2023-08-29 23:11:37,231 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:11:37,237 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 83 transitions, 178 flow [2023-08-29 23:11:37,239 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 83 transitions, 178 flow [2023-08-29 23:11:37,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 83 transitions, 178 flow [2023-08-29 23:11:37,253 INFO L130 PetriNetUnfolder]: 5/83 cut-off events. [2023-08-29 23:11:37,254 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:11:37,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 83 events. 5/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-29 23:11:37,255 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2023-08-29 23:11:39,120 INFO L134 LiptonReduction]: Checked pairs total: 693 [2023-08-29 23:11:39,120 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-08-29 23:11:39,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:11:39,133 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;@71166ac2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:11:39,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-29 23:11:39,135 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 23:11:39,135 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:11:39,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:39,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:11:39,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:39,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash 334, now seen corresponding path program 1 times [2023-08-29 23:11:39,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:39,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962853962] [2023-08-29 23:11:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:39,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:39,198 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 23:11:39,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:39,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962853962] [2023-08-29 23:11:39,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962853962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:39,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:39,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:11:39,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150189260] [2023-08-29 23:11:39,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:39,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:11:39,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:11:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:11:39,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-29 23:11:39,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 23:11:39,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:39,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-29 23:11:39,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:39,280 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-08-29 23:11:39,281 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 23:11:39,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 516 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-29 23:11:39,284 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-29 23:11:39,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-29 23:11:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:11:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:11:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2023-08-29 23:11:39,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443786982248521 [2023-08-29 23:11:39,295 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2023-08-29 23:11:39,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2023-08-29 23:11:39,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:39,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2023-08-29 23:11:39,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 23:11:39,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 23:11:39,306 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 23:11:39,308 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 184 transitions. [2023-08-29 23:11:39,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-29 23:11:39,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:11:39,310 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-29 23:11:39,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-29 23:11:39,319 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-29 23:11:39,319 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-29 23:11:39,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 23:11:39,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:39,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:11:39,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:11:39,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:39,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:39,322 INFO L85 PathProgramCache]: Analyzing trace with hash 327089, now seen corresponding path program 1 times [2023-08-29 23:11:39,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:39,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330927243] [2023-08-29 23:11:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:39,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:39,441 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 23:11:39,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:39,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330927243] [2023-08-29 23:11:39,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330927243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:39,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:39,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:11:39,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236115385] [2023-08-29 23:11:39,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:39,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:11:39,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:39,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:11:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:11:39,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 169 [2023-08-29 23:11:39,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 23:11:39,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:39,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 169 [2023-08-29 23:11:39,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:39,501 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-08-29 23:11:39,501 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:11:39,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 452 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-29 23:11:39,502 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-29 23:11:39,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-29 23:11:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:11:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:11:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-29 23:11:39,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-29 23:11:39,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-29 23:11:39,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-29 23:11:39,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:39,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-29 23:11:39,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 23:11:39,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:39,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:39,512 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 247 transitions. [2023-08-29 23:11:39,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-29 23:11:39,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:11:39,513 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-29 23:11:39,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-29 23:11:39,514 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-29 23:11:39,514 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-29 23:11:39,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 23:11:39,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:39,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:11:39,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:11:39,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:39,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash 327091, now seen corresponding path program 1 times [2023-08-29 23:11:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:39,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412031029] [2023-08-29 23:11:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:39,580 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 23:11:39,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412031029] [2023-08-29 23:11:39,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412031029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:39,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:39,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:11:39,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933281438] [2023-08-29 23:11:39,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:39,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:11:39,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:11:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:11:39,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-29 23:11:39,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 23:11:39,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:39,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-29 23:11:39,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:39,641 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-08-29 23:11:39,641 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:11:39,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 397 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-29 23:11:39,642 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-29 23:11:39,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-29 23:11:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:11:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:11:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-29 23:11:39,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45956607495069035 [2023-08-29 23:11:39,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-29 23:11:39,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-29 23:11:39,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:39,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-29 23:11:39,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states 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 23:11:39,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:39,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:39,646 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 233 transitions. [2023-08-29 23:11:39,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-29 23:11:39,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:11:39,647 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-29 23:11:39,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-29 23:11:39,648 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-29 23:11:39,648 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-29 23:11:39,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 23:11:39,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:39,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:11:39,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:11:39,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:39,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash 314340611, now seen corresponding path program 1 times [2023-08-29 23:11:39,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:39,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629114447] [2023-08-29 23:11:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:39,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629114447] [2023-08-29 23:11:39,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629114447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:39,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:39,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:11:39,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77588849] [2023-08-29 23:11:39,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:11:39,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:11:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:11:39,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 169 [2023-08-29 23:11:39,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:39,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:39,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 169 [2023-08-29 23:11:39,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:39,794 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-08-29 23:11:39,794 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:11:39,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 282 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-29 23:11:39,798 INFO L137 encePairwiseOnDemand]: 167/169 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-29 23:11:39,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-29 23:11:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:11:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:11:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-08-29 23:11:39,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319526627218935 [2023-08-29 23:11:39,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-08-29 23:11:39,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-08-29 23:11:39,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:39,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-08-29 23:11:39,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 23:11:39,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:39,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:39,803 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 219 transitions. [2023-08-29 23:11:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-29 23:11:39,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:11:39,804 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-29 23:11:39,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-29 23:11:39,805 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-29 23:11:39,805 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-29 23:11:39,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:39,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:39,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:11:39,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:11:39,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:39,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash 314340612, now seen corresponding path program 1 times [2023-08-29 23:11:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:39,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418935038] [2023-08-29 23:11:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:39,884 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 23:11:39,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:39,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418935038] [2023-08-29 23:11:39,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418935038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:39,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:39,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:11:39,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102309063] [2023-08-29 23:11:39,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:39,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:11:39,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:39,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:11:39,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:11:39,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 169 [2023-08-29 23:11:39,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 23:11:39,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:39,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 169 [2023-08-29 23:11:39,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:39,937 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-08-29 23:11:39,937 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:11:39,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 171 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-29 23:11:39,937 INFO L137 encePairwiseOnDemand]: 167/169 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-29 23:11:39,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-29 23:11:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:11:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:11:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-08-29 23:11:39,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46548323471400394 [2023-08-29 23:11:39,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-08-29 23:11:39,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-08-29 23:11:39,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:39,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-08-29 23:11:39,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:39,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:39,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:39,941 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 236 transitions. [2023-08-29 23:11:39,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-29 23:11:39,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:11:39,941 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-29 23:11:39,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-29 23:11:39,942 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-29 23:11:39,942 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-29 23:11:39,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 23:11:39,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:39,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:39,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:11:39,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:39,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:39,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1496637301, now seen corresponding path program 1 times [2023-08-29 23:11:39,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:39,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680927350] [2023-08-29 23:11:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:40,234 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 23:11:40,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:40,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680927350] [2023-08-29 23:11:40,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680927350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:40,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:40,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:11:40,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298659411] [2023-08-29 23:11:40,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:40,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:11:40,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:11:40,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:11:40,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 169 [2023-08-29 23:11:40,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 23:11:40,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:40,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 169 [2023-08-29 23:11:40,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:40,296 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2023-08-29 23:11:40,296 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:11:40,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 114 events. 65/114 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 318 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-29 23:11:40,297 INFO L137 encePairwiseOnDemand]: 165/169 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-08-29 23:11:40,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2023-08-29 23:11:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:11:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:11:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-08-29 23:11:40,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970414201183432 [2023-08-29 23:11:40,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-08-29 23:11:40,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-08-29 23:11:40,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:40,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-08-29 23:11:40,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 23:11:40,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:40,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 23:11:40,300 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 252 transitions. [2023-08-29 23:11:40,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2023-08-29 23:11:40,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:11:40,301 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 57 flow [2023-08-29 23:11:40,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-29 23:11:40,302 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-08-29 23:11:40,302 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 57 flow [2023-08-29 23:11:40,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 23:11:40,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:40,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:40,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:11:40,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:40,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:40,303 INFO L85 PathProgramCache]: Analyzing trace with hash 527342246, now seen corresponding path program 1 times [2023-08-29 23:11:40,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:40,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96973240] [2023-08-29 23:11:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:40,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:40,538 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 23:11:40,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:40,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96973240] [2023-08-29 23:11:40,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96973240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013232687] [2023-08-29 23:11:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:40,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:40,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:40,548 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 23:11:40,549 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 23:11:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:11:40,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:40,781 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 23:11:40,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:40,916 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 23:11:40,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013232687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:40,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:11:40,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-29 23:11:40,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291844355] [2023-08-29 23:11:40,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:40,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:11:40,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:11:40,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:11:40,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-08-29 23:11:40,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 57 flow. Second operand has 9 states, 9 states have (on average 74.0) internal successors, (666), 9 states have internal predecessors, (666), 0 states have call successors, (0), 0 states 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 23:11:40,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:40,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-08-29 23:11:40,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:41,119 INFO L130 PetriNetUnfolder]: 69/129 cut-off events. [2023-08-29 23:11:41,119 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 23:11:41,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 129 events. 69/129 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 377 event pairs, 3 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 318. Up to 79 conditions per place. [2023-08-29 23:11:41,120 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 23 selfloop transitions, 5 changer transitions 13/42 dead transitions. [2023-08-29 23:11:41,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 204 flow [2023-08-29 23:11:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:11:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:11:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 468 transitions. [2023-08-29 23:11:41,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-08-29 23:11:41,122 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 468 transitions. [2023-08-29 23:11:41,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 468 transitions. [2023-08-29 23:11:41,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:41,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 468 transitions. [2023-08-29 23:11:41,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:41,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 23:11:41,124 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 23:11:41,124 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 57 flow. Second operand 6 states and 468 transitions. [2023-08-29 23:11:41,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 204 flow [2023-08-29 23:11:41,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:11:41,125 INFO L231 Difference]: Finished difference. Result has 31 places, 19 transitions, 82 flow [2023-08-29 23:11:41,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=19} [2023-08-29 23:11:41,126 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-29 23:11:41,126 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 19 transitions, 82 flow [2023-08-29 23:11:41,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 74.0) internal successors, (666), 9 states have internal predecessors, (666), 0 states have call successors, (0), 0 states 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 23:11:41,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:41,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:41,136 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 23:11:41,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:41,333 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:41,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash -75004339, now seen corresponding path program 1 times [2023-08-29 23:11:41,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:41,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19913681] [2023-08-29 23:11:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:41,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:41,488 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 23:11:41,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19913681] [2023-08-29 23:11:41,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19913681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968415274] [2023-08-29 23:11:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:41,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:41,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:41,497 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 23:11:41,499 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 23:11:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:11:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:41,631 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 23:11:41,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:41,871 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 23:11:41,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968415274] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:41,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:11:41,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-29 23:11:41,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810296822] [2023-08-29 23:11:41,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:41,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:11:41,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:11:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:11:43,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:43,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-08-29 23:11:43,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 19 transitions, 82 flow. Second operand has 10 states, 10 states have (on average 74.3) internal successors, (743), 10 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 23:11:43,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:43,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-08-29 23:11:43,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:43,259 INFO L130 PetriNetUnfolder]: 59/112 cut-off events. [2023-08-29 23:11:43,259 INFO L131 PetriNetUnfolder]: For 53/60 co-relation queries the response was YES. [2023-08-29 23:11:43,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 112 events. 59/112 cut-off events. For 53/60 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 314 event pairs, 6 based on Foata normal form. 8/116 useless extension candidates. Maximal degree in co-relation 319. Up to 70 conditions per place. [2023-08-29 23:11:43,260 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 19 selfloop transitions, 6 changer transitions 13/40 dead transitions. [2023-08-29 23:11:43,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 220 flow [2023-08-29 23:11:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:11:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:11:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 464 transitions. [2023-08-29 23:11:43,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45759368836291914 [2023-08-29 23:11:43,262 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 464 transitions. [2023-08-29 23:11:43,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 464 transitions. [2023-08-29 23:11:43,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:43,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 464 transitions. [2023-08-29 23:11:43,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.33333333333333) internal successors, (464), 6 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 23:11:43,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 23:11:43,264 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 23:11:43,264 INFO L175 Difference]: Start difference. First operand has 31 places, 19 transitions, 82 flow. Second operand 6 states and 464 transitions. [2023-08-29 23:11:43,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 220 flow [2023-08-29 23:11:43,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 198 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-29 23:11:43,266 INFO L231 Difference]: Finished difference. Result has 34 places, 21 transitions, 98 flow [2023-08-29 23:11:43,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=21} [2023-08-29 23:11:43,266 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-29 23:11:43,266 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 21 transitions, 98 flow [2023-08-29 23:11:43,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 74.3) internal successors, (743), 10 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 23:11:43,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:43,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:43,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 23:11:43,471 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,SelfDestructingSolverStorable7 [2023-08-29 23:11:43,473 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:43,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:43,473 INFO L85 PathProgramCache]: Analyzing trace with hash 599970296, now seen corresponding path program 2 times [2023-08-29 23:11:43,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:43,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468123861] [2023-08-29 23:11:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:43,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:43,660 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 23:11:43,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:43,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468123861] [2023-08-29 23:11:43,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468123861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:43,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146100168] [2023-08-29 23:11:43,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:11:43,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:43,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:43,662 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 23:11:43,663 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 23:11:43,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:11:43,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:11:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:11:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:43,762 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 23:11:43,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:11:43,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146100168] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:43,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:11:43,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2023-08-29 23:11:43,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969923066] [2023-08-29 23:11:43,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:43,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:11:43,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:11:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-08-29 23:11:43,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-08-29 23:11:43,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 73.6) internal successors, (368), 5 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 23:11:43,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:43,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-08-29 23:11:43,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:43,908 INFO L130 PetriNetUnfolder]: 59/108 cut-off events. [2023-08-29 23:11:43,908 INFO L131 PetriNetUnfolder]: For 45/49 co-relation queries the response was YES. [2023-08-29 23:11:43,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 108 events. 59/108 cut-off events. For 45/49 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 243 event pairs, 7 based on Foata normal form. 5/112 useless extension candidates. Maximal degree in co-relation 326. Up to 72 conditions per place. [2023-08-29 23:11:43,909 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 20 selfloop transitions, 10 changer transitions 4/36 dead transitions. [2023-08-29 23:11:43,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 212 flow [2023-08-29 23:11:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:11:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:11:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 387 transitions. [2023-08-29 23:11:43,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45798816568047335 [2023-08-29 23:11:43,911 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 387 transitions. [2023-08-29 23:11:43,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 387 transitions. [2023-08-29 23:11:43,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:43,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 387 transitions. [2023-08-29 23:11:43,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.4) internal successors, (387), 5 states have internal predecessors, (387), 0 states have call successors, (0), 0 states 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 23:11:43,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 23:11:43,913 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 23:11:43,913 INFO L175 Difference]: Start difference. First operand has 34 places, 21 transitions, 98 flow. Second operand 5 states and 387 transitions. [2023-08-29 23:11:43,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 212 flow [2023-08-29 23:11:43,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 201 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 23:11:43,914 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 142 flow [2023-08-29 23:11:43,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-29 23:11:43,914 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-08-29 23:11:43,914 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 142 flow [2023-08-29 23:11:43,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.6) internal successors, (368), 5 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 23:11:43,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:43,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:43,922 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 23:11:44,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:44,124 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:44,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2140273285, now seen corresponding path program 2 times [2023-08-29 23:11:44,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:44,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927969105] [2023-08-29 23:11:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:44,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:44,253 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 23:11:44,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:44,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927969105] [2023-08-29 23:11:44,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927969105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:44,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518209413] [2023-08-29 23:11:44,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:11:44,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:44,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:44,255 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 23:11:44,257 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 23:11:44,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:11:44,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:11:44,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:11:44,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:44,360 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 23:11:44,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:44,476 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 23:11:44,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518209413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:44,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:11:44,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-29 23:11:44,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873333837] [2023-08-29 23:11:44,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:44,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:11:44,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:44,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:11:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:11:44,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-08-29 23:11:44,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 73.8) internal successors, (738), 10 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 23:11:44,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:44,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-08-29 23:11:44,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:45,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:47,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:48,046 INFO L130 PetriNetUnfolder]: 101/193 cut-off events. [2023-08-29 23:11:48,046 INFO L131 PetriNetUnfolder]: For 198/208 co-relation queries the response was YES. [2023-08-29 23:11:48,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 193 events. 101/193 cut-off events. For 198/208 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 632 event pairs, 8 based on Foata normal form. 11/198 useless extension candidates. Maximal degree in co-relation 665. Up to 106 conditions per place. [2023-08-29 23:11:48,047 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 40 selfloop transitions, 15 changer transitions 6/63 dead transitions. [2023-08-29 23:11:48,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 404 flow [2023-08-29 23:11:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:11:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:11:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 698 transitions. [2023-08-29 23:11:48,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589086127547666 [2023-08-29 23:11:48,049 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 698 transitions. [2023-08-29 23:11:48,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 698 transitions. [2023-08-29 23:11:48,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:48,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 698 transitions. [2023-08-29 23:11:48,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 23:11:48,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states 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 23:11:48,053 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states 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 23:11:48,053 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 142 flow. Second operand 9 states and 698 transitions. [2023-08-29 23:11:48,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 404 flow [2023-08-29 23:11:48,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 63 transitions, 390 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-29 23:11:48,057 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 226 flow [2023-08-29 23:11:48,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-08-29 23:11:48,059 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-29 23:11:48,059 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 226 flow [2023-08-29 23:11:48,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.8) internal successors, (738), 10 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 23:11:48,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:48,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:48,068 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 23:11:48,264 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 23:11:48,264 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:48,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash 222714814, now seen corresponding path program 3 times [2023-08-29 23:11:48,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:48,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931372588] [2023-08-29 23:11:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:48,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:48,448 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 23:11:48,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931372588] [2023-08-29 23:11:48,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931372588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269504830] [2023-08-29 23:11:48,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:11:48,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:48,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:48,450 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 23:11:48,452 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 23:11:48,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:11:48,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:11:48,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:11:48,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:48,579 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 23:11:48,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:48,738 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 23:11:48,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269504830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:48,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:11:48,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-29 23:11:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113217459] [2023-08-29 23:11:48,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:48,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:11:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:11:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:11:48,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-08-29 23:11:48,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 226 flow. Second operand has 10 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 23:11:48,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:48,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-08-29 23:11:48,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:49,003 INFO L130 PetriNetUnfolder]: 138/273 cut-off events. [2023-08-29 23:11:49,003 INFO L131 PetriNetUnfolder]: For 441/441 co-relation queries the response was YES. [2023-08-29 23:11:49,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 273 events. 138/273 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1049 event pairs, 28 based on Foata normal form. 3/269 useless extension candidates. Maximal degree in co-relation 1014. Up to 202 conditions per place. [2023-08-29 23:11:49,004 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 43 selfloop transitions, 15 changer transitions 12/72 dead transitions. [2023-08-29 23:11:49,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 530 flow [2023-08-29 23:11:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:11:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:11:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 698 transitions. [2023-08-29 23:11:49,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589086127547666 [2023-08-29 23:11:49,006 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 698 transitions. [2023-08-29 23:11:49,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 698 transitions. [2023-08-29 23:11:49,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:49,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 698 transitions. [2023-08-29 23:11:49,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 23:11:49,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states 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 23:11:49,009 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states 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 23:11:49,009 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 226 flow. Second operand 9 states and 698 transitions. [2023-08-29 23:11:49,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 530 flow [2023-08-29 23:11:49,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 483 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-29 23:11:49,013 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 305 flow [2023-08-29 23:11:49,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-29 23:11:49,014 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 24 predicate places. [2023-08-29 23:11:49,014 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 305 flow [2023-08-29 23:11:49,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 23:11:49,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:49,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:49,021 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 23:11:49,215 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 23:11:49,215 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:49,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:49,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1292742541, now seen corresponding path program 3 times [2023-08-29 23:11:49,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:49,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065323545] [2023-08-29 23:11:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:49,348 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 23:11:49,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065323545] [2023-08-29 23:11:49,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065323545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111298816] [2023-08-29 23:11:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:11:49,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:49,350 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 23:11:49,352 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 23:11:49,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:11:49,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:11:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:11:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:49,514 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 23:11:49,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:49,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111298816] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:49,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:11:49,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 6] total 12 [2023-08-29 23:11:49,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856504106] [2023-08-29 23:11:49,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:49,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:11:49,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:49,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:11:49,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:11:49,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 169 [2023-08-29 23:11:49,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 305 flow. Second operand has 6 states, 6 states have (on average 70.33333333333333) internal successors, (422), 6 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 23:11:49,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:49,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 169 [2023-08-29 23:11:49,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:49,804 INFO L130 PetriNetUnfolder]: 163/316 cut-off events. [2023-08-29 23:11:49,804 INFO L131 PetriNetUnfolder]: For 695/695 co-relation queries the response was YES. [2023-08-29 23:11:49,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 316 events. 163/316 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1200 event pairs, 49 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 1208. Up to 273 conditions per place. [2023-08-29 23:11:49,806 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 44 selfloop transitions, 10 changer transitions 2/56 dead transitions. [2023-08-29 23:11:49,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 484 flow [2023-08-29 23:11:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:11:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:11:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 372 transitions. [2023-08-29 23:11:49,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44023668639053254 [2023-08-29 23:11:49,808 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 372 transitions. [2023-08-29 23:11:49,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 372 transitions. [2023-08-29 23:11:49,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:49,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 372 transitions. [2023-08-29 23:11:49,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:49,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 23:11:49,810 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 23:11:49,810 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 305 flow. Second operand 5 states and 372 transitions. [2023-08-29 23:11:49,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 484 flow [2023-08-29 23:11:49,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 429 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-08-29 23:11:49,814 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 327 flow [2023-08-29 23:11:49,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-08-29 23:11:49,815 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-08-29 23:11:49,815 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 327 flow [2023-08-29 23:11:49,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.33333333333333) internal successors, (422), 6 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 23:11:49,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:49,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:49,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-29 23:11:50,020 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 23:11:50,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:50,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1282096742, now seen corresponding path program 1 times [2023-08-29 23:11:50,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:50,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706325466] [2023-08-29 23:11:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:50,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:50,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:50,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706325466] [2023-08-29 23:11:50,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706325466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:50,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833470248] [2023-08-29 23:11:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:50,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:50,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:50,284 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 23:11:50,286 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 23:11:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:50,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 23:11:50,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:50,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:59,052 WARN L222 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 763 DAG size of output: 752 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-29 23:13:14,373 WARN L222 SmtUtils]: Spent 25.77s on a formula simplification. DAG size of input: 1367 DAG size of output: 1342 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-29 23:19:58,448 WARN L222 SmtUtils]: Spent 19.53s on a formula simplification. DAG size of input: 114 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:20:34,189 WARN L222 SmtUtils]: Spent 14.66s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:21:05,896 WARN L222 SmtUtils]: Spent 12.37s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:21:40,336 WARN L222 SmtUtils]: Spent 10.15s on a formula simplification. DAG size of input: 72 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:21:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:21:58,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833470248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:21:58,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:21:58,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2023-08-29 23:21:58,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41271080] [2023-08-29 23:21:58,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:21:58,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 23:21:58,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:21:58,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 23:21:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=365, Unknown=9, NotChecked=0, Total=462 [2023-08-29 23:22:00,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:02,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:04,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:06,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:08,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:10,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:13,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:15,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:17,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:19,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:22,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:24,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:26,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:28,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:30,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:30,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 169 [2023-08-29 23:22:30,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 327 flow. Second operand has 22 states, 22 states have (on average 63.59090909090909) internal successors, (1399), 22 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:30,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:22:30,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 169 [2023-08-29 23:22:30,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:22:36,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:40,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:45,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:49,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:51,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:53,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:55,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:57,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:22:59,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:23:01,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:23:03,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:23:05,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:23:07,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:23:09,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:23:11,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:23:12,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:23:39,419 WARN L222 SmtUtils]: Spent 23.68s on a formula simplification. DAG size of input: 93 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:23:39,458 INFO L130 PetriNetUnfolder]: 274/539 cut-off events. [2023-08-29 23:23:39,458 INFO L131 PetriNetUnfolder]: For 1099/1099 co-relation queries the response was YES. [2023-08-29 23:23:39,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2025 conditions, 539 events. 274/539 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2617 event pairs, 5 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 2007. Up to 186 conditions per place. [2023-08-29 23:23:39,461 INFO L137 encePairwiseOnDemand]: 160/169 looper letters, 88 selfloop transitions, 60 changer transitions 43/191 dead transitions. [2023-08-29 23:23:39,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 191 transitions, 1358 flow [2023-08-29 23:23:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-29 23:23:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-29 23:23:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1956 transitions. [2023-08-29 23:23:39,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39910222403591106 [2023-08-29 23:23:39,465 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1956 transitions. [2023-08-29 23:23:39,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1956 transitions. [2023-08-29 23:23:39,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:39,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1956 transitions. [2023-08-29 23:23:39,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 67.44827586206897) internal successors, (1956), 29 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states 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 23:23:39,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 169.0) internal successors, (5070), 30 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states 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 23:23:39,474 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 169.0) internal successors, (5070), 30 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states 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 23:23:39,474 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 327 flow. Second operand 29 states and 1956 transitions. [2023-08-29 23:23:39,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 191 transitions, 1358 flow [2023-08-29 23:23:39,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 191 transitions, 1326 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-29 23:23:39,479 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 778 flow [2023-08-29 23:23:39,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=778, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2023-08-29 23:23:39,479 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2023-08-29 23:23:39,479 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 778 flow [2023-08-29 23:23:39,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.59090909090909) internal successors, (1399), 22 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states 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 23:23:39,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:39,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:39,489 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 23:23:39,685 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 23:23:39,687 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:23:39,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1703099676, now seen corresponding path program 2 times [2023-08-29 23:23:39,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:39,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20224265] [2023-08-29 23:23:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:40,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20224265] [2023-08-29 23:23:40,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20224265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:23:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454850692] [2023-08-29 23:23:40,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:23:40,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:23:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:23:40,020 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 23:23:40,022 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 23:23:40,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:23:40,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:23:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 23:23:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:23:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:40,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:23:48,502 WARN L222 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 763 DAG size of output: 752 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-29 23:25:07,454 WARN L222 SmtUtils]: Spent 25.75s on a formula simplification. DAG size of input: 1367 DAG size of output: 1342 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15