./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:25:10,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:25:10,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:25:10,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:25:10,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:25:10,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:25:10,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:25:10,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:25:10,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:25:10,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:25:10,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:25:10,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:25:10,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:25:10,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:25:10,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:25:10,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:25:10,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:25:10,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:25:10,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:25:10,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:25:10,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:25:10,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:25:10,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:25:10,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:25:10,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:25:10,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:25:10,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:25:10,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:25:10,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:25:10,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:25:10,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:25:10,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:25:10,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:25:10,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:25:10,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:25:10,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:25:10,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:25:10,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:25:10,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:25:10,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:25:10,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:25:10,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:25:10,204 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:25:10,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:25:10,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:25:10,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:25:10,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:25:10,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:25:10,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:25:10,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:25:10,207 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:25:10,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:25:10,208 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:25:10,209 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:25:10,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:25:10,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:25:10,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:25:10,209 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:25:10,210 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:25:10,210 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:25:10,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:25:10,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:25:10,210 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:25:10,210 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:25:10,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:25:10,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:25:10,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:25:10,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:25:10,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:25:10,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:25:10,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:25:10,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:25:10,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:25:10,212 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:25:10,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:25:10,213 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:25:10,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:25:10,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:25:10,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:25:10,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:25:10,548 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:25:10,549 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:25:10,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-30 06:25:11,649 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:25:11,828 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:25:11,829 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-30 06:25:11,834 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75af7788/ff2fbba297714198918475e6fb1cafb1/FLAG91ae4d5e9 [2023-08-30 06:25:11,849 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75af7788/ff2fbba297714198918475e6fb1cafb1 [2023-08-30 06:25:11,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:25:11,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:25:11,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:25:11,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:25:11,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:25:11,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:25:11" (1/1) ... [2023-08-30 06:25:11,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5af0916d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:11, skipping insertion in model container [2023-08-30 06:25:11,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:25:11" (1/1) ... [2023-08-30 06:25:11,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:25:11,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:25:12,046 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/popl20-figure3.wvr.c[2121,2134] [2023-08-30 06:25:12,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:25:12,065 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:25:12,091 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/popl20-figure3.wvr.c[2121,2134] [2023-08-30 06:25:12,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:25:12,105 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:25:12,105 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:25:12,111 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:25:12,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12 WrapperNode [2023-08-30 06:25:12,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:25:12,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:25:12,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:25:12,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:25:12,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,159 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-30 06:25:12,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:25:12,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:25:12,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:25:12,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:25:12,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,195 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:25:12,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:25:12,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:25:12,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:25:12,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (1/1) ... [2023-08-30 06:25:12,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:25:12,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:12,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:25:12,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:25:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:25:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:25:12,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:25:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:25:12,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:25:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 06:25:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:25:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 06:25:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:25:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:25:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:25:12,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:25:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 06:25:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:25:12,286 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:25:12,358 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:25:12,360 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:25:12,622 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:25:12,666 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:25:12,666 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 06:25:12,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:25:12 BoogieIcfgContainer [2023-08-30 06:25:12,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:25:12,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:25:12,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:25:12,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:25:12,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:25:11" (1/3) ... [2023-08-30 06:25:12,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474b92c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:25:12, skipping insertion in model container [2023-08-30 06:25:12,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:12" (2/3) ... [2023-08-30 06:25:12,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474b92c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:25:12, skipping insertion in model container [2023-08-30 06:25:12,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:25:12" (3/3) ... [2023-08-30 06:25:12,677 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-08-30 06:25:12,691 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:25:12,692 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 06:25:12,692 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:25:12,789 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 06:25:12,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 94 transitions, 204 flow [2023-08-30 06:25:12,904 INFO L130 PetriNetUnfolder]: 6/92 cut-off events. [2023-08-30 06:25:12,904 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:25:12,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 6/92 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. 0/76 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-30 06:25:12,911 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 94 transitions, 204 flow [2023-08-30 06:25:12,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 88 transitions, 188 flow [2023-08-30 06:25:12,918 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:25:12,929 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 88 transitions, 188 flow [2023-08-30 06:25:12,935 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 88 transitions, 188 flow [2023-08-30 06:25:12,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 188 flow [2023-08-30 06:25:12,969 INFO L130 PetriNetUnfolder]: 6/88 cut-off events. [2023-08-30 06:25:12,970 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:25:12,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 88 events. 6/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-30 06:25:12,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2023-08-30 06:25:15,718 INFO L134 LiptonReduction]: Checked pairs total: 779 [2023-08-30 06:25:15,719 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-30 06:25:15,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:25:15,737 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;@41706e3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:25:15,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 06:25:15,739 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 06:25:15,739 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:25:15,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:15,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 06:25:15,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:15,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:15,745 INFO L85 PathProgramCache]: Analyzing trace with hash 371, now seen corresponding path program 1 times [2023-08-30 06:25:15,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:15,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89611371] [2023-08-30 06:25:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:15,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:15,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89611371] [2023-08-30 06:25:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89611371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:15,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:15,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 06:25:15,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325934390] [2023-08-30 06:25:15,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:15,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 06:25:15,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:15,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 06:25:15,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 06:25:15,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 06:25:15,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:15,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:15,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 06:25:15,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:15,954 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-08-30 06:25:15,954 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 06:25:15,955 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 520 event pairs, 42 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-30 06:25:15,957 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-30 06:25:15,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-30 06:25:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 06:25:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 06:25:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2023-08-30 06:25:15,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248618784530387 [2023-08-30 06:25:15,970 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2023-08-30 06:25:15,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2023-08-30 06:25:15,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:15,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2023-08-30 06:25:15,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:15,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:15,981 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:15,982 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 190 transitions. [2023-08-30 06:25:15,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-30 06:25:15,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:25:15,986 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-30 06:25:15,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-08-30 06:25:15,991 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 06:25:15,992 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-30 06:25:15,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:15,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:15,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:25:15,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 06:25:15,993 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)] === [2023-08-30 06:25:15,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash 362648, now seen corresponding path program 1 times [2023-08-30 06:25:15,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:15,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741096678] [2023-08-30 06:25:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:15,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:16,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:16,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741096678] [2023-08-30 06:25:16,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741096678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:16,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:16,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:25:16,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775646493] [2023-08-30 06:25:16,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:16,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:25:16,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:16,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:25:16,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:25:16,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 181 [2023-08-30 06:25:16,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:16,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 181 [2023-08-30 06:25:16,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:16,355 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-08-30 06:25:16,356 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:25:16,356 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 462 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-30 06:25:16,359 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 06:25:16,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-30 06:25:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:25:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:25:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-08-30 06:25:16,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714548802946593 [2023-08-30 06:25:16,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-08-30 06:25:16,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-08-30 06:25:16,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:16,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-08-30 06:25:16,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,375 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 256 transitions. [2023-08-30 06:25:16,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-30 06:25:16,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 06:25:16,376 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-30 06:25:16,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-08-30 06:25:16,377 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 06:25:16,378 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-30 06:25:16,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:16,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:25:16,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 06:25:16,380 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)] === [2023-08-30 06:25:16,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash 362647, now seen corresponding path program 1 times [2023-08-30 06:25:16,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:16,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285316410] [2023-08-30 06:25:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:16,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:16,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285316410] [2023-08-30 06:25:16,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285316410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:16,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:16,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:25:16,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645028948] [2023-08-30 06:25:16,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:16,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:25:16,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:16,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:25:16,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:25:16,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 181 [2023-08-30 06:25:16,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:16,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 181 [2023-08-30 06:25:16,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:16,532 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-08-30 06:25:16,533 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:25:16,533 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 404 event pairs, 36 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-30 06:25:16,534 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-30 06:25:16,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-30 06:25:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:25:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:25:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-30 06:25:16,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567219152854515 [2023-08-30 06:25:16,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-30 06:25:16,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-30 06:25:16,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:16,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-30 06:25:16,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,540 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 242 transitions. [2023-08-30 06:25:16,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-30 06:25:16,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:25:16,541 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-30 06:25:16,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-08-30 06:25:16,542 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 06:25:16,545 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-30 06:25:16,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:16,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:25:16,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 06:25:16,547 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)] === [2023-08-30 06:25:16,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash 348510888, now seen corresponding path program 1 times [2023-08-30 06:25:16,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:16,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897892853] [2023-08-30 06:25:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:16,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:16,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:16,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897892853] [2023-08-30 06:25:16,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897892853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:16,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:16,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:25:16,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311750220] [2023-08-30 06:25:16,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:16,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:25:16,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:16,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:25:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:25:16,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 181 [2023-08-30 06:25:16,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:16,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 181 [2023-08-30 06:25:16,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:16,749 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-08-30 06:25:16,750 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:25:16,750 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 291 event pairs, 27 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-30 06:25:16,751 INFO L137 encePairwiseOnDemand]: 179/181 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-30 06:25:16,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-30 06:25:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:25:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:25:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-30 06:25:16,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198895027624309 [2023-08-30 06:25:16,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-30 06:25:16,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-30 06:25:16,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:16,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-30 06:25:16,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,757 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 228 transitions. [2023-08-30 06:25:16,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-30 06:25:16,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:25:16,758 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-30 06:25:16,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-08-30 06:25:16,759 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 06:25:16,759 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-30 06:25:16,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:16,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:25:16,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 06:25:16,760 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)] === [2023-08-30 06:25:16,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:16,760 INFO L85 PathProgramCache]: Analyzing trace with hash 348510889, now seen corresponding path program 1 times [2023-08-30 06:25:16,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:16,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152061741] [2023-08-30 06:25:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:16,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:16,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:16,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152061741] [2023-08-30 06:25:16,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152061741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:16,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:16,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:25:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165230613] [2023-08-30 06:25:16,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:16,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:25:16,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:16,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:25:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:25:16,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-08-30 06:25:16,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:16,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-08-30 06:25:16,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:16,943 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-08-30 06:25:16,943 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:25:16,944 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 172 event pairs, 18 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-30 06:25:16,944 INFO L137 encePairwiseOnDemand]: 179/181 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-30 06:25:16,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-30 06:25:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:25:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:25:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-08-30 06:25:16,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45119705340699817 [2023-08-30 06:25:16,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-08-30 06:25:16,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-08-30 06:25:16,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:16,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-08-30 06:25:16,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,949 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 245 transitions. [2023-08-30 06:25:16,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-30 06:25:16,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:25:16,950 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-30 06:25:16,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-08-30 06:25:16,951 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 06:25:16,951 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-30 06:25:16,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:16,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:16,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:16,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 06:25:16,952 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)] === [2023-08-30 06:25:16,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:16,952 INFO L85 PathProgramCache]: Analyzing trace with hash -363417635, now seen corresponding path program 1 times [2023-08-30 06:25:16,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:16,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849931258] [2023-08-30 06:25:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:16,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:17,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:17,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849931258] [2023-08-30 06:25:17,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849931258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:17,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:17,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:25:17,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472591415] [2023-08-30 06:25:17,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:17,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:25:17,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:17,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:25:17,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:25:17,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-08-30 06:25:17,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:17,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-08-30 06:25:17,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:17,120 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-08-30 06:25:17,120 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:25:17,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 273 event pairs, 13 based on Foata normal form. 1/67 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2023-08-30 06:25:17,121 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-30 06:25:17,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2023-08-30 06:25:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:25:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:25:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-08-30 06:25:17,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972375690607735 [2023-08-30 06:25:17,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-08-30 06:25:17,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-08-30 06:25:17,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:17,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-08-30 06:25:17,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,126 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 270 transitions. [2023-08-30 06:25:17,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2023-08-30 06:25:17,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:25:17,127 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2023-08-30 06:25:17,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-08-30 06:25:17,128 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-08-30 06:25:17,129 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2023-08-30 06:25:17,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:17,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:17,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 06:25:17,130 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)] === [2023-08-30 06:25:17,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1993736684, now seen corresponding path program 1 times [2023-08-30 06:25:17,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:17,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251902950] [2023-08-30 06:25:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:17,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:17,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:17,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251902950] [2023-08-30 06:25:17,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251902950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:17,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:17,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:25:17,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279409592] [2023-08-30 06:25:17,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:17,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:25:17,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:17,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:25:17,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:25:17,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:17,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:17,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:17,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:17,335 INFO L130 PetriNetUnfolder]: 68/137 cut-off events. [2023-08-30 06:25:17,335 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 06:25:17,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 137 events. 68/137 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 419 event pairs, 24 based on Foata normal form. 2/139 useless extension candidates. Maximal degree in co-relation 320. Up to 74 conditions per place. [2023-08-30 06:25:17,336 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 19 selfloop transitions, 4 changer transitions 17/40 dead transitions. [2023-08-30 06:25:17,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 189 flow [2023-08-30 06:25:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:25:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:25:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2023-08-30 06:25:17,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44659300184162065 [2023-08-30 06:25:17,339 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2023-08-30 06:25:17,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2023-08-30 06:25:17,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:17,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2023-08-30 06:25:17,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,343 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,343 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 6 states and 485 transitions. [2023-08-30 06:25:17,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 189 flow [2023-08-30 06:25:17,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:25:17,344 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 79 flow [2023-08-30 06:25:17,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=79, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-30 06:25:17,345 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-30 06:25:17,345 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 79 flow [2023-08-30 06:25:17,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:17,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:17,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 06:25:17,346 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)] === [2023-08-30 06:25:17,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:17,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1088757098, now seen corresponding path program 2 times [2023-08-30 06:25:17,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:17,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186640774] [2023-08-30 06:25:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:17,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:17,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:17,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186640774] [2023-08-30 06:25:17,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186640774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:17,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621172364] [2023-08-30 06:25:17,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:25:17,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:17,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:17,441 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) [2023-08-30 06:25:17,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 06:25:17,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:25:17,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:25:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:17,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:17,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621172364] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:17,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:25:17,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-30 06:25:17,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51972056] [2023-08-30 06:25:17,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:17,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:25:17,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:17,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:25:17,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:25:17,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-08-30 06:25:17,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:17,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-08-30 06:25:17,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:17,733 INFO L130 PetriNetUnfolder]: 49/92 cut-off events. [2023-08-30 06:25:17,733 INFO L131 PetriNetUnfolder]: For 58/64 co-relation queries the response was YES. [2023-08-30 06:25:17,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 92 events. 49/92 cut-off events. For 58/64 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 217 event pairs, 3 based on Foata normal form. 12/104 useless extension candidates. Maximal degree in co-relation 294. Up to 62 conditions per place. [2023-08-30 06:25:17,734 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 24 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-08-30 06:25:17,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 173 flow [2023-08-30 06:25:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:25:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:25:17,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 335 transitions. [2023-08-30 06:25:17,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462707182320442 [2023-08-30 06:25:17,736 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 335 transitions. [2023-08-30 06:25:17,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 335 transitions. [2023-08-30 06:25:17,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:17,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 335 transitions. [2023-08-30 06:25:17,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,740 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 79 flow. Second operand 4 states and 335 transitions. [2023-08-30 06:25:17,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 173 flow [2023-08-30 06:25:17,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 157 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 06:25:17,742 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 93 flow [2023-08-30 06:25:17,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-30 06:25:17,742 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-30 06:25:17,743 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 93 flow [2023-08-30 06:25:17,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:17,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:17,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:17,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:17,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:17,950 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)] === [2023-08-30 06:25:17,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:17,951 INFO L85 PathProgramCache]: Analyzing trace with hash -438644134, now seen corresponding path program 3 times [2023-08-30 06:25:17,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:17,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628656864] [2023-08-30 06:25:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:17,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:18,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:18,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628656864] [2023-08-30 06:25:18,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628656864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:18,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:18,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:25:18,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740551660] [2023-08-30 06:25:18,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:18,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:25:18,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:18,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:25:18,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:25:18,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 181 [2023-08-30 06:25:18,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:18,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 181 [2023-08-30 06:25:18,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:18,146 INFO L130 PetriNetUnfolder]: 67/132 cut-off events. [2023-08-30 06:25:18,147 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-08-30 06:25:18,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 132 events. 67/132 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 21 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 437. Up to 75 conditions per place. [2023-08-30 06:25:18,148 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 29 selfloop transitions, 6 changer transitions 2/37 dead transitions. [2023-08-30 06:25:18,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 230 flow [2023-08-30 06:25:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:25:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:25:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2023-08-30 06:25:18,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450828729281768 [2023-08-30 06:25:18,151 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2023-08-30 06:25:18,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2023-08-30 06:25:18,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:18,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2023-08-30 06:25:18,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,154 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,154 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 93 flow. Second operand 5 states and 408 transitions. [2023-08-30 06:25:18,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 230 flow [2023-08-30 06:25:18,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 225 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 06:25:18,156 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 132 flow [2023-08-30 06:25:18,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2023-08-30 06:25:18,157 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-08-30 06:25:18,157 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 132 flow [2023-08-30 06:25:18,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:18,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:18,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 06:25:18,158 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)] === [2023-08-30 06:25:18,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:18,159 INFO L85 PathProgramCache]: Analyzing trace with hash 384552564, now seen corresponding path program 4 times [2023-08-30 06:25:18,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:18,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351315075] [2023-08-30 06:25:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:18,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:18,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:18,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351315075] [2023-08-30 06:25:18,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351315075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768682836] [2023-08-30 06:25:18,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:25:18,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:18,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:18,257 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) [2023-08-30 06:25:18,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 06:25:18,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:25:18,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:18,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:25:18,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:18,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:18,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768682836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:18,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:18,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-30 06:25:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286021089] [2023-08-30 06:25:18,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:18,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 06:25:18,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 06:25:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 06:25:18,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:18,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 77.42857142857143) internal successors, (542), 7 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:18,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:18,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:18,607 INFO L130 PetriNetUnfolder]: 82/157 cut-off events. [2023-08-30 06:25:18,607 INFO L131 PetriNetUnfolder]: For 423/423 co-relation queries the response was YES. [2023-08-30 06:25:18,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 157 events. 82/157 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 447 event pairs, 26 based on Foata normal form. 6/163 useless extension candidates. Maximal degree in co-relation 639. Up to 104 conditions per place. [2023-08-30 06:25:18,609 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 33 selfloop transitions, 11 changer transitions 2/46 dead transitions. [2023-08-30 06:25:18,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 334 flow [2023-08-30 06:25:18,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:25:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:25:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2023-08-30 06:25:18,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435674822415154 [2023-08-30 06:25:18,611 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2023-08-30 06:25:18,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2023-08-30 06:25:18,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:18,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2023-08-30 06:25:18,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,615 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,616 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 132 flow. Second operand 7 states and 562 transitions. [2023-08-30 06:25:18,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 334 flow [2023-08-30 06:25:18,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 317 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 06:25:18,619 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 180 flow [2023-08-30 06:25:18,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2023-08-30 06:25:18,620 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-08-30 06:25:18,620 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 180 flow [2023-08-30 06:25:18,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.42857142857143) internal successors, (542), 7 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:18,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:18,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:18,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:18,826 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,SelfDestructingSolverStorable9 [2023-08-30 06:25:18,826 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)] === [2023-08-30 06:25:18,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash 309110386, now seen corresponding path program 5 times [2023-08-30 06:25:18,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:18,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280404833] [2023-08-30 06:25:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:18,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:18,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:18,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280404833] [2023-08-30 06:25:18,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280404833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:18,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200283829] [2023-08-30 06:25:18,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:25:18,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:18,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:18,947 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) [2023-08-30 06:25:18,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 06:25:19,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:25:19,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:19,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:25:19,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:19,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:19,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200283829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:19,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:19,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 06:25:19,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281223154] [2023-08-30 06:25:19,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:19,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:25:19,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:19,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:25:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:25:19,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:19,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 26 transitions, 180 flow. Second operand has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:19,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:19,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:19,226 INFO L130 PetriNetUnfolder]: 76/143 cut-off events. [2023-08-30 06:25:19,227 INFO L131 PetriNetUnfolder]: For 487/487 co-relation queries the response was YES. [2023-08-30 06:25:19,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 143 events. 76/143 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 21 based on Foata normal form. 6/149 useless extension candidates. Maximal degree in co-relation 613. Up to 87 conditions per place. [2023-08-30 06:25:19,228 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 25 selfloop transitions, 11 changer transitions 2/38 dead transitions. [2023-08-30 06:25:19,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 313 flow [2023-08-30 06:25:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:25:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:25:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2023-08-30 06:25:19,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453038674033149 [2023-08-30 06:25:19,230 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2023-08-30 06:25:19,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2023-08-30 06:25:19,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:19,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2023-08-30 06:25:19,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,234 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,234 INFO L175 Difference]: Start difference. First operand has 42 places, 26 transitions, 180 flow. Second operand 5 states and 403 transitions. [2023-08-30 06:25:19,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 313 flow [2023-08-30 06:25:19,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 298 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 06:25:19,237 INFO L231 Difference]: Finished difference. Result has 45 places, 26 transitions, 190 flow [2023-08-30 06:25:19,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=45, PETRI_TRANSITIONS=26} [2023-08-30 06:25:19,238 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-30 06:25:19,238 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 190 flow [2023-08-30 06:25:19,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:19,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:19,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:19,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:19,445 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)] === [2023-08-30 06:25:19,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:19,446 INFO L85 PathProgramCache]: Analyzing trace with hash -86748654, now seen corresponding path program 1 times [2023-08-30 06:25:19,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:19,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675353714] [2023-08-30 06:25:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:19,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:19,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:19,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675353714] [2023-08-30 06:25:19,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675353714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:19,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910722614] [2023-08-30 06:25:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:19,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:19,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:19,580 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) [2023-08-30 06:25:19,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 06:25:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:19,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:25:19,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:19,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:19,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910722614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:19,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:19,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2023-08-30 06:25:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573166764] [2023-08-30 06:25:19,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:19,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 06:25:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:19,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 06:25:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 06:25:19,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 06:25:19,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 26 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:19,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 06:25:19,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:19,835 INFO L130 PetriNetUnfolder]: 122/230 cut-off events. [2023-08-30 06:25:19,835 INFO L131 PetriNetUnfolder]: For 644/658 co-relation queries the response was YES. [2023-08-30 06:25:19,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 230 events. 122/230 cut-off events. For 644/658 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 801 event pairs, 16 based on Foata normal form. 18/246 useless extension candidates. Maximal degree in co-relation 963. Up to 113 conditions per place. [2023-08-30 06:25:19,838 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-08-30 06:25:19,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 395 flow [2023-08-30 06:25:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:25:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:25:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2023-08-30 06:25:19,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4903314917127072 [2023-08-30 06:25:19,840 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2023-08-30 06:25:19,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2023-08-30 06:25:19,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:19,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2023-08-30 06:25:19,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,843 INFO L175 Difference]: Start difference. First operand has 45 places, 26 transitions, 190 flow. Second operand 4 states and 355 transitions. [2023-08-30 06:25:19,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 395 flow [2023-08-30 06:25:19,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 358 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 06:25:19,846 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 269 flow [2023-08-30 06:25:19,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-08-30 06:25:19,847 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-30 06:25:19,847 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 269 flow [2023-08-30 06:25:19,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:19,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:19,848 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:19,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:20,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:20,054 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)] === [2023-08-30 06:25:20,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:20,054 INFO L85 PathProgramCache]: Analyzing trace with hash -593314255, now seen corresponding path program 2 times [2023-08-30 06:25:20,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:20,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577322913] [2023-08-30 06:25:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:20,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:20,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:20,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577322913] [2023-08-30 06:25:20,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577322913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:20,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995658575] [2023-08-30 06:25:20,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:25:20,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:20,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:20,200 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) [2023-08-30 06:25:20,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 06:25:20,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:25:20,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:25:20,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:20,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:20,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995658575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:20,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:20,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 06:25:20,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962016552] [2023-08-30 06:25:20,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:20,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:25:20,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:20,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:25:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:25:20,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:20,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 269 flow. Second operand has 14 states, 14 states have (on average 76.07142857142857) internal successors, (1065), 14 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:20,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:20,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:20,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:21,276 INFO L130 PetriNetUnfolder]: 344/706 cut-off events. [2023-08-30 06:25:21,277 INFO L131 PetriNetUnfolder]: For 1635/1635 co-relation queries the response was YES. [2023-08-30 06:25:21,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2855 conditions, 706 events. 344/706 cut-off events. For 1635/1635 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3615 event pairs, 10 based on Foata normal form. 16/722 useless extension candidates. Maximal degree in co-relation 2839. Up to 239 conditions per place. [2023-08-30 06:25:21,283 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 110 selfloop transitions, 63 changer transitions 33/206 dead transitions. [2023-08-30 06:25:21,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 206 transitions, 1646 flow [2023-08-30 06:25:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 06:25:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 06:25:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2399 transitions. [2023-08-30 06:25:21,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441804788213628 [2023-08-30 06:25:21,290 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2399 transitions. [2023-08-30 06:25:21,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2399 transitions. [2023-08-30 06:25:21,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:21,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2399 transitions. [2023-08-30 06:25:21,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 79.96666666666667) internal successors, (2399), 30 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:21,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:21,308 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:21,308 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 269 flow. Second operand 30 states and 2399 transitions. [2023-08-30 06:25:21,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 206 transitions, 1646 flow [2023-08-30 06:25:21,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 206 transitions, 1604 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-30 06:25:21,318 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 973 flow [2023-08-30 06:25:21,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=973, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2023-08-30 06:25:21,320 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2023-08-30 06:25:21,320 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 973 flow [2023-08-30 06:25:21,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.07142857142857) internal successors, (1065), 14 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:21,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:21,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:21,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:21,532 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,SelfDestructingSolverStorable12 [2023-08-30 06:25:21,533 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)] === [2023-08-30 06:25:21,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:21,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1208063949, now seen corresponding path program 3 times [2023-08-30 06:25:21,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:21,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773736685] [2023-08-30 06:25:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:21,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:21,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773736685] [2023-08-30 06:25:21,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773736685] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:21,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337618339] [2023-08-30 06:25:21,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:25:21,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:21,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:21,706 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) [2023-08-30 06:25:21,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 06:25:21,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:25:21,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:21,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:25:21,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:21,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337618339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:21,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:21,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-30 06:25:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979640982] [2023-08-30 06:25:21,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:21,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:25:21,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:21,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:25:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:25:21,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:21,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 973 flow. Second operand has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 12 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:21,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:21,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:21,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:22,288 INFO L130 PetriNetUnfolder]: 319/640 cut-off events. [2023-08-30 06:25:22,288 INFO L131 PetriNetUnfolder]: For 4621/4621 co-relation queries the response was YES. [2023-08-30 06:25:22,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 640 events. 319/640 cut-off events. For 4621/4621 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3107 event pairs, 35 based on Foata normal form. 18/658 useless extension candidates. Maximal degree in co-relation 3568. Up to 294 conditions per place. [2023-08-30 06:25:22,294 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 103 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2023-08-30 06:25:22,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1616 flow [2023-08-30 06:25:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:25:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:25:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 809 transitions. [2023-08-30 06:25:22,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696132596685084 [2023-08-30 06:25:22,297 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 809 transitions. [2023-08-30 06:25:22,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 809 transitions. [2023-08-30 06:25:22,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:22,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 809 transitions. [2023-08-30 06:25:22,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.9) internal successors, (809), 10 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:22,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:22,303 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:22,303 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 973 flow. Second operand 10 states and 809 transitions. [2023-08-30 06:25:22,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1616 flow [2023-08-30 06:25:22,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 138 transitions, 1229 flow, removed 156 selfloop flow, removed 7 redundant places. [2023-08-30 06:25:22,326 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 871 flow [2023-08-30 06:25:22,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=871, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2023-08-30 06:25:22,327 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2023-08-30 06:25:22,327 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 871 flow [2023-08-30 06:25:22,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 12 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:22,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:22,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:22,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:22,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:22,534 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:22,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash 617588799, now seen corresponding path program 4 times [2023-08-30 06:25:22,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:22,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205415178] [2023-08-30 06:25:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:22,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:22,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205415178] [2023-08-30 06:25:22,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205415178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785573814] [2023-08-30 06:25:22,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:25:22,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:22,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:22,673 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) [2023-08-30 06:25:22,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 06:25:22,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:25:22,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:22,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:25:22,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:22,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785573814] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:22,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:22,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 06:25:22,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682953347] [2023-08-30 06:25:22,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:22,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:25:22,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:22,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:25:22,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:25:22,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:22,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 871 flow. Second operand has 14 states, 14 states have (on average 76.14285714285714) internal successors, (1066), 14 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:22,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:22,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:22,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:23,573 INFO L130 PetriNetUnfolder]: 403/794 cut-off events. [2023-08-30 06:25:23,573 INFO L131 PetriNetUnfolder]: For 9150/9150 co-relation queries the response was YES. [2023-08-30 06:25:23,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4274 conditions, 794 events. 403/794 cut-off events. For 9150/9150 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4057 event pairs, 39 based on Foata normal form. 48/842 useless extension candidates. Maximal degree in co-relation 4246. Up to 350 conditions per place. [2023-08-30 06:25:23,582 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 126 selfloop transitions, 66 changer transitions 0/192 dead transitions. [2023-08-30 06:25:23,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 192 transitions, 1916 flow [2023-08-30 06:25:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 06:25:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 06:25:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1447 transitions. [2023-08-30 06:25:23,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44413750767341925 [2023-08-30 06:25:23,587 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1447 transitions. [2023-08-30 06:25:23,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1447 transitions. [2023-08-30 06:25:23,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:23,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1447 transitions. [2023-08-30 06:25:23,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 80.38888888888889) internal successors, (1447), 18 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:23,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:23,597 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:23,597 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 871 flow. Second operand 18 states and 1447 transitions. [2023-08-30 06:25:23,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 192 transitions, 1916 flow [2023-08-30 06:25:23,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 192 transitions, 1769 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-08-30 06:25:23,617 INFO L231 Difference]: Finished difference. Result has 106 places, 128 transitions, 1374 flow [2023-08-30 06:25:23,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1374, PETRI_PLACES=106, PETRI_TRANSITIONS=128} [2023-08-30 06:25:23,618 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-08-30 06:25:23,618 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 128 transitions, 1374 flow [2023-08-30 06:25:23,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.14285714285714) internal successors, (1066), 14 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:23,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:23,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:23,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:23,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:23,829 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:23,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash 56336925, now seen corresponding path program 5 times [2023-08-30 06:25:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:23,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384443927] [2023-08-30 06:25:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:23,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:23,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384443927] [2023-08-30 06:25:23,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384443927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326459335] [2023-08-30 06:25:23,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:25:23,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:23,994 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) [2023-08-30 06:25:24,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 06:25:24,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:25:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:25:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:24,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:24,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326459335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:24,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:24,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-30 06:25:24,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78547453] [2023-08-30 06:25:24,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:24,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:25:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:25:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:25:24,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:24,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 128 transitions, 1374 flow. Second operand has 14 states, 14 states have (on average 75.85714285714286) internal successors, (1062), 14 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:24,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:24,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:24,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:24,923 INFO L130 PetriNetUnfolder]: 486/967 cut-off events. [2023-08-30 06:25:24,924 INFO L131 PetriNetUnfolder]: For 19244/19244 co-relation queries the response was YES. [2023-08-30 06:25:24,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6158 conditions, 967 events. 486/967 cut-off events. For 19244/19244 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5290 event pairs, 22 based on Foata normal form. 30/997 useless extension candidates. Maximal degree in co-relation 6123. Up to 278 conditions per place. [2023-08-30 06:25:24,934 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 88 selfloop transitions, 105 changer transitions 5/198 dead transitions. [2023-08-30 06:25:24,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 198 transitions, 2299 flow [2023-08-30 06:25:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 06:25:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 06:25:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1042 transitions. [2023-08-30 06:25:24,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44283892902677435 [2023-08-30 06:25:24,937 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1042 transitions. [2023-08-30 06:25:24,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1042 transitions. [2023-08-30 06:25:24,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:24,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1042 transitions. [2023-08-30 06:25:24,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 80.15384615384616) internal successors, (1042), 13 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:24,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:24,943 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:24,943 INFO L175 Difference]: Start difference. First operand has 106 places, 128 transitions, 1374 flow. Second operand 13 states and 1042 transitions. [2023-08-30 06:25:24,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 198 transitions, 2299 flow [2023-08-30 06:25:24,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 198 transitions, 2025 flow, removed 103 selfloop flow, removed 7 redundant places. [2023-08-30 06:25:24,988 INFO L231 Difference]: Finished difference. Result has 117 places, 153 transitions, 1824 flow [2023-08-30 06:25:24,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1824, PETRI_PLACES=117, PETRI_TRANSITIONS=153} [2023-08-30 06:25:24,989 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 88 predicate places. [2023-08-30 06:25:24,989 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 153 transitions, 1824 flow [2023-08-30 06:25:24,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 75.85714285714286) internal successors, (1062), 14 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:24,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:24,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:24,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 06:25:25,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 06:25:25,197 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:25,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:25,198 INFO L85 PathProgramCache]: Analyzing trace with hash -398260725, now seen corresponding path program 6 times [2023-08-30 06:25:25,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:25,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229015456] [2023-08-30 06:25:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:25,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:25,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:25,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229015456] [2023-08-30 06:25:25,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229015456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:25,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119123833] [2023-08-30 06:25:25,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:25:25,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:25,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:25,337 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:25,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 06:25:25,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 06:25:25,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:25:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:25,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:25,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119123833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:25,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:25,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 06:25:25,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118962400] [2023-08-30 06:25:25,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:25,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 06:25:25,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:25,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 06:25:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-30 06:25:25,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:25,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 153 transitions, 1824 flow. Second operand has 15 states, 15 states have (on average 76.13333333333334) internal successors, (1142), 15 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:25,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:25,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:25,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:26,530 INFO L130 PetriNetUnfolder]: 725/1434 cut-off events. [2023-08-30 06:25:26,530 INFO L131 PetriNetUnfolder]: For 43138/43138 co-relation queries the response was YES. [2023-08-30 06:25:26,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10246 conditions, 1434 events. 725/1434 cut-off events. For 43138/43138 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8727 event pairs, 176 based on Foata normal form. 100/1534 useless extension candidates. Maximal degree in co-relation 10206. Up to 832 conditions per place. [2023-08-30 06:25:26,548 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 209 selfloop transitions, 125 changer transitions 3/337 dead transitions. [2023-08-30 06:25:26,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 337 transitions, 4433 flow [2023-08-30 06:25:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:25:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:25:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1931 transitions. [2023-08-30 06:25:26,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44452117863720075 [2023-08-30 06:25:26,552 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1931 transitions. [2023-08-30 06:25:26,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1931 transitions. [2023-08-30 06:25:26,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:26,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1931 transitions. [2023-08-30 06:25:26,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 80.45833333333333) internal successors, (1931), 24 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:26,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:26,562 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:26,562 INFO L175 Difference]: Start difference. First operand has 117 places, 153 transitions, 1824 flow. Second operand 24 states and 1931 transitions. [2023-08-30 06:25:26,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 337 transitions, 4433 flow [2023-08-30 06:25:26,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 337 transitions, 4036 flow, removed 181 selfloop flow, removed 5 redundant places. [2023-08-30 06:25:26,660 INFO L231 Difference]: Finished difference. Result has 148 places, 223 transitions, 3199 flow [2023-08-30 06:25:26,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3199, PETRI_PLACES=148, PETRI_TRANSITIONS=223} [2023-08-30 06:25:26,661 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 119 predicate places. [2023-08-30 06:25:26,661 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 223 transitions, 3199 flow [2023-08-30 06:25:26,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 76.13333333333334) internal successors, (1142), 15 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:26,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:26,662 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:26,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:26,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 06:25:26,867 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:26,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash 883114373, now seen corresponding path program 7 times [2023-08-30 06:25:26,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:26,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11242144] [2023-08-30 06:25:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:26,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:27,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11242144] [2023-08-30 06:25:27,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11242144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313341337] [2023-08-30 06:25:27,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 06:25:27,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:27,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:27,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:27,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 06:25:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:27,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:25:27,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:27,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:27,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313341337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:27,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:27,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 06:25:27,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700303814] [2023-08-30 06:25:27,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:27,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:25:27,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:27,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:25:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:25:27,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:27,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 223 transitions, 3199 flow. Second operand has 14 states, 14 states have (on average 75.85714285714286) internal successors, (1062), 14 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:27,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:27,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:27,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:28,202 INFO L130 PetriNetUnfolder]: 860/1731 cut-off events. [2023-08-30 06:25:28,202 INFO L131 PetriNetUnfolder]: For 65810/65810 co-relation queries the response was YES. [2023-08-30 06:25:28,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14054 conditions, 1731 events. 860/1731 cut-off events. For 65810/65810 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11048 event pairs, 83 based on Foata normal form. 16/1747 useless extension candidates. Maximal degree in co-relation 14001. Up to 542 conditions per place. [2023-08-30 06:25:28,227 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 157 selfloop transitions, 182 changer transitions 5/344 dead transitions. [2023-08-30 06:25:28,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 344 transitions, 5761 flow [2023-08-30 06:25:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 06:25:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 06:25:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1746 transitions. [2023-08-30 06:25:28,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384731290808639 [2023-08-30 06:25:28,231 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1746 transitions. [2023-08-30 06:25:28,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1746 transitions. [2023-08-30 06:25:28,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:28,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1746 transitions. [2023-08-30 06:25:28,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 79.36363636363636) internal successors, (1746), 22 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:28,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 181.0) internal successors, (4163), 23 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:28,239 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 181.0) internal successors, (4163), 23 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:28,239 INFO L175 Difference]: Start difference. First operand has 148 places, 223 transitions, 3199 flow. Second operand 22 states and 1746 transitions. [2023-08-30 06:25:28,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 344 transitions, 5761 flow [2023-08-30 06:25:28,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 344 transitions, 5074 flow, removed 308 selfloop flow, removed 8 redundant places. [2023-08-30 06:25:28,385 INFO L231 Difference]: Finished difference. Result has 170 places, 272 transitions, 4211 flow [2023-08-30 06:25:28,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4211, PETRI_PLACES=170, PETRI_TRANSITIONS=272} [2023-08-30 06:25:28,386 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 141 predicate places. [2023-08-30 06:25:28,386 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 272 transitions, 4211 flow [2023-08-30 06:25:28,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 75.85714285714286) internal successors, (1062), 14 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:28,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:28,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:28,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:28,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 06:25:28,593 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:28,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1768505241, now seen corresponding path program 8 times [2023-08-30 06:25:28,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:28,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920198694] [2023-08-30 06:25:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:28,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:28,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:28,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920198694] [2023-08-30 06:25:28,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920198694] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:28,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349750457] [2023-08-30 06:25:28,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:25:28,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:28,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:28,737 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:28,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 06:25:28,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:25:28,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:28,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:25:28,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:28,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:28,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349750457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:28,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:28,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 06:25:28,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62640796] [2023-08-30 06:25:28,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:28,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 06:25:28,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 06:25:28,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 06:25:28,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:28,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 272 transitions, 4211 flow. Second operand has 15 states, 15 states have (on average 75.93333333333334) internal successors, (1139), 15 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:28,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:29,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:29,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:29,756 INFO L130 PetriNetUnfolder]: 828/1658 cut-off events. [2023-08-30 06:25:29,756 INFO L131 PetriNetUnfolder]: For 75394/75394 co-relation queries the response was YES. [2023-08-30 06:25:29,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13425 conditions, 1658 events. 828/1658 cut-off events. For 75394/75394 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10428 event pairs, 197 based on Foata normal form. 36/1694 useless extension candidates. Maximal degree in co-relation 13365. Up to 856 conditions per place. [2023-08-30 06:25:29,788 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 154 selfloop transitions, 146 changer transitions 3/303 dead transitions. [2023-08-30 06:25:29,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 303 transitions, 4850 flow [2023-08-30 06:25:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 06:25:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 06:25:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1039 transitions. [2023-08-30 06:25:29,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415639609009775 [2023-08-30 06:25:29,791 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1039 transitions. [2023-08-30 06:25:29,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1039 transitions. [2023-08-30 06:25:29,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:29,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1039 transitions. [2023-08-30 06:25:29,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 79.92307692307692) internal successors, (1039), 13 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:29,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:29,796 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:29,796 INFO L175 Difference]: Start difference. First operand has 170 places, 272 transitions, 4211 flow. Second operand 13 states and 1039 transitions. [2023-08-30 06:25:29,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 303 transitions, 4850 flow [2023-08-30 06:25:29,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 303 transitions, 4646 flow, removed 101 selfloop flow, removed 2 redundant places. [2023-08-30 06:25:30,000 INFO L231 Difference]: Finished difference. Result has 181 places, 265 transitions, 4274 flow [2023-08-30 06:25:30,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4274, PETRI_PLACES=181, PETRI_TRANSITIONS=265} [2023-08-30 06:25:30,002 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2023-08-30 06:25:30,002 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 265 transitions, 4274 flow [2023-08-30 06:25:30,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 75.93333333333334) internal successors, (1139), 15 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:30,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:30,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:30,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:30,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:30,208 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:30,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1245012087, now seen corresponding path program 9 times [2023-08-30 06:25:30,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:30,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919898694] [2023-08-30 06:25:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:30,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:30,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:30,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919898694] [2023-08-30 06:25:30,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919898694] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:30,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49746194] [2023-08-30 06:25:30,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:25:30,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:30,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:30,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:30,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 06:25:30,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:25:30,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:30,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:25:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:25:30,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:25:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49746194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:30,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:30,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-30 06:25:30,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42482414] [2023-08-30 06:25:30,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:30,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 06:25:30,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:30,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 06:25:30,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 06:25:30,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 06:25:30,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 265 transitions, 4274 flow. Second operand has 9 states, 9 states have (on average 84.11111111111111) internal successors, (757), 9 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:30,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:30,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 06:25:30,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:31,216 INFO L130 PetriNetUnfolder]: 999/2055 cut-off events. [2023-08-30 06:25:31,217 INFO L131 PetriNetUnfolder]: For 96327/96337 co-relation queries the response was YES. [2023-08-30 06:25:31,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17786 conditions, 2055 events. 999/2055 cut-off events. For 96327/96337 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14109 event pairs, 158 based on Foata normal form. 106/2159 useless extension candidates. Maximal degree in co-relation 17723. Up to 1032 conditions per place. [2023-08-30 06:25:31,246 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 226 selfloop transitions, 99 changer transitions 54/388 dead transitions. [2023-08-30 06:25:31,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 388 transitions, 7083 flow [2023-08-30 06:25:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:25:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:25:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 446 transitions. [2023-08-30 06:25:31,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49281767955801103 [2023-08-30 06:25:31,250 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 446 transitions. [2023-08-30 06:25:31,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 446 transitions. [2023-08-30 06:25:31,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:31,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 446 transitions. [2023-08-30 06:25:31,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:31,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:31,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:31,253 INFO L175 Difference]: Start difference. First operand has 181 places, 265 transitions, 4274 flow. Second operand 5 states and 446 transitions. [2023-08-30 06:25:31,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 388 transitions, 7083 flow [2023-08-30 06:25:31,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 388 transitions, 6769 flow, removed 36 selfloop flow, removed 14 redundant places. [2023-08-30 06:25:31,528 INFO L231 Difference]: Finished difference. Result has 173 places, 282 transitions, 4926 flow [2023-08-30 06:25:31,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4926, PETRI_PLACES=173, PETRI_TRANSITIONS=282} [2023-08-30 06:25:31,529 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 144 predicate places. [2023-08-30 06:25:31,529 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 282 transitions, 4926 flow [2023-08-30 06:25:31,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.11111111111111) internal successors, (757), 9 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:31,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:31,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:31,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:31,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:31,735 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:31,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1748741396, now seen corresponding path program 10 times [2023-08-30 06:25:31,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:31,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268642733] [2023-08-30 06:25:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:31,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:31,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:31,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268642733] [2023-08-30 06:25:31,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268642733] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:31,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707711445] [2023-08-30 06:25:31,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:25:31,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:31,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:31,910 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:31,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 06:25:31,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:25:31,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:31,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:25:31,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:32,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:32,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707711445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:32,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:32,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 06:25:32,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349696327] [2023-08-30 06:25:32,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:32,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 06:25:32,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:32,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 06:25:32,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-30 06:25:32,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:32,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 282 transitions, 4926 flow. Second operand has 15 states, 15 states have (on average 76.0) internal successors, (1140), 15 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:32,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:32,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:32,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:33,567 INFO L130 PetriNetUnfolder]: 1816/3701 cut-off events. [2023-08-30 06:25:33,568 INFO L131 PetriNetUnfolder]: For 177730/177730 co-relation queries the response was YES. [2023-08-30 06:25:33,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32550 conditions, 3701 events. 1816/3701 cut-off events. For 177730/177730 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27787 event pairs, 247 based on Foata normal form. 72/3773 useless extension candidates. Maximal degree in co-relation 32490. Up to 1432 conditions per place. [2023-08-30 06:25:33,618 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 491 selfloop transitions, 158 changer transitions 7/656 dead transitions. [2023-08-30 06:25:33,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 656 transitions, 12060 flow [2023-08-30 06:25:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 06:25:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 06:25:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1376 transitions. [2023-08-30 06:25:33,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447188820279493 [2023-08-30 06:25:33,623 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1376 transitions. [2023-08-30 06:25:33,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1376 transitions. [2023-08-30 06:25:33,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:33,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1376 transitions. [2023-08-30 06:25:33,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 80.94117647058823) internal successors, (1376), 17 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:33,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 181.0) internal successors, (3258), 18 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:33,630 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 181.0) internal successors, (3258), 18 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:33,630 INFO L175 Difference]: Start difference. First operand has 173 places, 282 transitions, 4926 flow. Second operand 17 states and 1376 transitions. [2023-08-30 06:25:33,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 656 transitions, 12060 flow [2023-08-30 06:25:34,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 656 transitions, 11811 flow, removed 119 selfloop flow, removed 5 redundant places. [2023-08-30 06:25:34,178 INFO L231 Difference]: Finished difference. Result has 184 places, 400 transitions, 7450 flow [2023-08-30 06:25:34,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7450, PETRI_PLACES=184, PETRI_TRANSITIONS=400} [2023-08-30 06:25:34,179 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2023-08-30 06:25:34,179 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 400 transitions, 7450 flow [2023-08-30 06:25:34,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 76.0) internal successors, (1140), 15 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:34,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:34,180 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:34,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:34,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-30 06:25:34,386 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:34,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:34,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2037253858, now seen corresponding path program 11 times [2023-08-30 06:25:34,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:34,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148178740] [2023-08-30 06:25:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:34,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:34,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148178740] [2023-08-30 06:25:34,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148178740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192364645] [2023-08-30 06:25:34,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:25:34,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:34,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:34,557 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:34,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 06:25:34,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 06:25:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:34,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:25:34,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:34,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:34,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192364645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:34,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:34,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 06:25:34,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770528089] [2023-08-30 06:25:34,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:34,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:25:34,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:25:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:25:34,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:34,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 400 transitions, 7450 flow. Second operand has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:34,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:34,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:34,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:36,852 INFO L130 PetriNetUnfolder]: 1962/3981 cut-off events. [2023-08-30 06:25:36,852 INFO L131 PetriNetUnfolder]: For 187772/187772 co-relation queries the response was YES. [2023-08-30 06:25:36,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36669 conditions, 3981 events. 1962/3981 cut-off events. For 187772/187772 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 30429 event pairs, 275 based on Foata normal form. 86/4067 useless extension candidates. Maximal degree in co-relation 36604. Up to 1498 conditions per place. [2023-08-30 06:25:36,894 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 557 selfloop transitions, 212 changer transitions 7/776 dead transitions. [2023-08-30 06:25:36,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 776 transitions, 14484 flow [2023-08-30 06:25:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 06:25:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 06:25:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2806 transitions. [2023-08-30 06:25:36,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429360694554065 [2023-08-30 06:25:36,899 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2806 transitions. [2023-08-30 06:25:36,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2806 transitions. [2023-08-30 06:25:36,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:36,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2806 transitions. [2023-08-30 06:25:36,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 80.17142857142858) internal successors, (2806), 35 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:36,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 181.0) internal successors, (6516), 36 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:36,910 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 181.0) internal successors, (6516), 36 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:36,910 INFO L175 Difference]: Start difference. First operand has 184 places, 400 transitions, 7450 flow. Second operand 35 states and 2806 transitions. [2023-08-30 06:25:36,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 776 transitions, 14484 flow [2023-08-30 06:25:37,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 776 transitions, 14061 flow, removed 191 selfloop flow, removed 4 redundant places. [2023-08-30 06:25:37,654 INFO L231 Difference]: Finished difference. Result has 225 places, 468 transitions, 9306 flow [2023-08-30 06:25:37,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=7133, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9306, PETRI_PLACES=225, PETRI_TRANSITIONS=468} [2023-08-30 06:25:37,655 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 196 predicate places. [2023-08-30 06:25:37,655 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 468 transitions, 9306 flow [2023-08-30 06:25:37,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:37,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:37,656 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:37,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 06:25:37,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:37,856 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:37,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1267397294, now seen corresponding path program 12 times [2023-08-30 06:25:37,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:37,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926112451] [2023-08-30 06:25:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926112451] [2023-08-30 06:25:38,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926112451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:38,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330857145] [2023-08-30 06:25:38,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:25:38,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:38,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:38,112 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:38,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 06:25:38,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 06:25:38,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:38,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:25:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:38,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:38,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330857145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:38,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:38,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-30 06:25:38,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412434498] [2023-08-30 06:25:38,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:38,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 06:25:38,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 06:25:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-30 06:25:38,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:38,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 468 transitions, 9306 flow. Second operand has 22 states, 22 states have (on average 75.54545454545455) internal successors, (1662), 22 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:38,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:38,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:38,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:41,746 INFO L130 PetriNetUnfolder]: 2426/4956 cut-off events. [2023-08-30 06:25:41,746 INFO L131 PetriNetUnfolder]: For 292889/292889 co-relation queries the response was YES. [2023-08-30 06:25:41,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50236 conditions, 4956 events. 2426/4956 cut-off events. For 292889/292889 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39838 event pairs, 122 based on Foata normal form. 38/4994 useless extension candidates. Maximal degree in co-relation 50160. Up to 1333 conditions per place. [2023-08-30 06:25:41,798 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 332 selfloop transitions, 638 changer transitions 30/1000 dead transitions. [2023-08-30 06:25:41,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1000 transitions, 21212 flow [2023-08-30 06:25:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-30 06:25:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-30 06:25:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4768 transitions. [2023-08-30 06:25:41,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390423572744015 [2023-08-30 06:25:41,806 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4768 transitions. [2023-08-30 06:25:41,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4768 transitions. [2023-08-30 06:25:41,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:41,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4768 transitions. [2023-08-30 06:25:41,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 79.46666666666667) internal successors, (4768), 60 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:41,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 181.0) internal successors, (11041), 61 states have internal predecessors, (11041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:41,828 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 181.0) internal successors, (11041), 61 states have internal predecessors, (11041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:41,829 INFO L175 Difference]: Start difference. First operand has 225 places, 468 transitions, 9306 flow. Second operand 60 states and 4768 transitions. [2023-08-30 06:25:41,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1000 transitions, 21212 flow [2023-08-30 06:25:43,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1000 transitions, 20341 flow, removed 376 selfloop flow, removed 10 redundant places. [2023-08-30 06:25:43,055 INFO L231 Difference]: Finished difference. Result has 294 places, 752 transitions, 17161 flow [2023-08-30 06:25:43,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=8744, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=17161, PETRI_PLACES=294, PETRI_TRANSITIONS=752} [2023-08-30 06:25:43,056 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 265 predicate places. [2023-08-30 06:25:43,056 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 752 transitions, 17161 flow [2023-08-30 06:25:43,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.54545454545455) internal successors, (1662), 22 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:43,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:43,057 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:43,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:43,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:43,258 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:43,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash -435630226, now seen corresponding path program 13 times [2023-08-30 06:25:43,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:43,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934815786] [2023-08-30 06:25:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:43,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:43,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:43,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934815786] [2023-08-30 06:25:43,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934815786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116652756] [2023-08-30 06:25:43,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 06:25:43,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:43,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:43,519 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:43,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 06:25:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:43,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:25:43,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:43,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:43,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116652756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:43,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:43,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-30 06:25:43,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633711433] [2023-08-30 06:25:43,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:43,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 06:25:43,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 06:25:43,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-08-30 06:25:43,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:43,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 752 transitions, 17161 flow. Second operand has 22 states, 22 states have (on average 75.5909090909091) internal successors, (1663), 22 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:43,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:43,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:43,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:47,129 INFO L130 PetriNetUnfolder]: 2387/4835 cut-off events. [2023-08-30 06:25:47,130 INFO L131 PetriNetUnfolder]: For 463727/463727 co-relation queries the response was YES. [2023-08-30 06:25:47,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53749 conditions, 4835 events. 2387/4835 cut-off events. For 463727/463727 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 38317 event pairs, 202 based on Foata normal form. 108/4943 useless extension candidates. Maximal degree in co-relation 53654. Up to 1275 conditions per place. [2023-08-30 06:25:47,186 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 420 selfloop transitions, 517 changer transitions 5/942 dead transitions. [2023-08-30 06:25:47,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 942 transitions, 21563 flow [2023-08-30 06:25:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 06:25:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 06:25:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3520 transitions. [2023-08-30 06:25:47,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419889502762431 [2023-08-30 06:25:47,192 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3520 transitions. [2023-08-30 06:25:47,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3520 transitions. [2023-08-30 06:25:47,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:47,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3520 transitions. [2023-08-30 06:25:47,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 80.0) internal successors, (3520), 44 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:47,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 181.0) internal successors, (8145), 45 states have internal predecessors, (8145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:47,207 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 181.0) internal successors, (8145), 45 states have internal predecessors, (8145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:47,208 INFO L175 Difference]: Start difference. First operand has 294 places, 752 transitions, 17161 flow. Second operand 44 states and 3520 transitions. [2023-08-30 06:25:47,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 942 transitions, 21563 flow [2023-08-30 06:25:49,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 942 transitions, 19575 flow, removed 882 selfloop flow, removed 16 redundant places. [2023-08-30 06:25:49,287 INFO L231 Difference]: Finished difference. Result has 329 places, 753 transitions, 16733 flow [2023-08-30 06:25:49,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=14801, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16733, PETRI_PLACES=329, PETRI_TRANSITIONS=753} [2023-08-30 06:25:49,288 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 300 predicate places. [2023-08-30 06:25:49,289 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 753 transitions, 16733 flow [2023-08-30 06:25:49,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.5909090909091) internal successors, (1663), 22 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:49,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:49,289 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:49,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-30 06:25:49,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 06:25:49,497 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:49,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1265018710, now seen corresponding path program 14 times [2023-08-30 06:25:49,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:49,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017677333] [2023-08-30 06:25:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:49,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017677333] [2023-08-30 06:25:49,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017677333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255932028] [2023-08-30 06:25:49,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:25:49,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:49,650 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:49,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 06:25:49,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:25:49,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:49,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:25:49,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:49,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:49,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255932028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:49,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:49,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 06:25:49,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51064567] [2023-08-30 06:25:49,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:49,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 06:25:49,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:49,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 06:25:49,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-30 06:25:49,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:49,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 753 transitions, 16733 flow. Second operand has 17 states, 17 states have (on average 75.6470588235294) internal successors, (1286), 17 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:49,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:49,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:49,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:55,085 INFO L130 PetriNetUnfolder]: 2553/5177 cut-off events. [2023-08-30 06:25:55,085 INFO L131 PetriNetUnfolder]: For 528645/528645 co-relation queries the response was YES. [2023-08-30 06:25:55,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58015 conditions, 5177 events. 2553/5177 cut-off events. For 528645/528645 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 41615 event pairs, 307 based on Foata normal form. 112/5289 useless extension candidates. Maximal degree in co-relation 57912. Up to 1938 conditions per place. [2023-08-30 06:25:55,144 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 621 selfloop transitions, 341 changer transitions 22/984 dead transitions. [2023-08-30 06:25:55,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 984 transitions, 22093 flow [2023-08-30 06:25:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 06:25:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 06:25:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2803 transitions. [2023-08-30 06:25:55,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424625098658248 [2023-08-30 06:25:55,147 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2803 transitions. [2023-08-30 06:25:55,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2803 transitions. [2023-08-30 06:25:55,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:55,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2803 transitions. [2023-08-30 06:25:55,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 80.08571428571429) internal successors, (2803), 35 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:55,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 181.0) internal successors, (6516), 36 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:55,156 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 181.0) internal successors, (6516), 36 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:55,156 INFO L175 Difference]: Start difference. First operand has 329 places, 753 transitions, 16733 flow. Second operand 35 states and 2803 transitions. [2023-08-30 06:25:55,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 984 transitions, 22093 flow [2023-08-30 06:25:57,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 984 transitions, 21285 flow, removed 149 selfloop flow, removed 32 redundant places. [2023-08-30 06:25:57,279 INFO L231 Difference]: Finished difference. Result has 339 places, 803 transitions, 18416 flow [2023-08-30 06:25:57,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=15923, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18416, PETRI_PLACES=339, PETRI_TRANSITIONS=803} [2023-08-30 06:25:57,280 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 310 predicate places. [2023-08-30 06:25:57,280 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 803 transitions, 18416 flow [2023-08-30 06:25:57,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.6470588235294) internal successors, (1286), 17 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:57,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:57,280 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:57,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:57,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:57,481 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:25:57,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:57,482 INFO L85 PathProgramCache]: Analyzing trace with hash -820146284, now seen corresponding path program 15 times [2023-08-30 06:25:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:57,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388343629] [2023-08-30 06:25:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:57,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:57,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:57,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388343629] [2023-08-30 06:25:57,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388343629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:57,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562987907] [2023-08-30 06:25:57,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:25:57,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:57,638 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:57,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 06:25:57,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:25:57,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:57,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:25:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:57,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:57,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562987907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:57,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:57,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 06:25:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794298826] [2023-08-30 06:25:57,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:25:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:25:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:25:58,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:25:58,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 803 transitions, 18416 flow. Second operand has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:58,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:58,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:25:58,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:26:01,311 INFO L130 PetriNetUnfolder]: 3040/6136 cut-off events. [2023-08-30 06:26:01,311 INFO L131 PetriNetUnfolder]: For 693451/693451 co-relation queries the response was YES. [2023-08-30 06:26:01,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72125 conditions, 6136 events. 3040/6136 cut-off events. For 693451/693451 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 50831 event pairs, 936 based on Foata normal form. 70/6206 useless extension candidates. Maximal degree in co-relation 72018. Up to 3950 conditions per place. [2023-08-30 06:26:01,388 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 819 selfloop transitions, 315 changer transitions 1/1135 dead transitions. [2023-08-30 06:26:01,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1135 transitions, 26471 flow [2023-08-30 06:26:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 06:26:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 06:26:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3117 transitions. [2023-08-30 06:26:01,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415639609009775 [2023-08-30 06:26:01,396 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3117 transitions. [2023-08-30 06:26:01,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3117 transitions. [2023-08-30 06:26:01,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:26:01,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3117 transitions. [2023-08-30 06:26:01,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 79.92307692307692) internal successors, (3117), 39 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:01,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:01,413 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:01,413 INFO L175 Difference]: Start difference. First operand has 339 places, 803 transitions, 18416 flow. Second operand 39 states and 3117 transitions. [2023-08-30 06:26:01,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1135 transitions, 26471 flow [2023-08-30 06:26:04,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1135 transitions, 26012 flow, removed 171 selfloop flow, removed 14 redundant places. [2023-08-30 06:26:04,411 INFO L231 Difference]: Finished difference. Result has 379 places, 933 transitions, 22671 flow [2023-08-30 06:26:04,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=18044, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=22671, PETRI_PLACES=379, PETRI_TRANSITIONS=933} [2023-08-30 06:26:04,413 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 350 predicate places. [2023-08-30 06:26:04,413 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 933 transitions, 22671 flow [2023-08-30 06:26:04,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:04,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:26:04,413 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:26:04,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 06:26:04,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:26:04,614 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:26:04,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:26:04,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1083346284, now seen corresponding path program 16 times [2023-08-30 06:26:04,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:26:04,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49832427] [2023-08-30 06:26:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:26:04,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:26:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:26:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:04,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:26:04,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49832427] [2023-08-30 06:26:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49832427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:26:04,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946528000] [2023-08-30 06:26:04,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:26:04,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:26:04,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:26:04,749 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:26:04,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 06:26:04,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:26:04,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:26:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:26:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:26:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:04,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:26:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:05,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946528000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:26:05,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:26:05,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-30 06:26:05,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618592115] [2023-08-30 06:26:05,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:26:05,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:26:05,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:26:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:26:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:26:05,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:26:05,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 933 transitions, 22671 flow. Second operand has 18 states, 18 states have (on average 75.77777777777777) internal successors, (1364), 18 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:05,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:26:05,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:26:05,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:26:09,702 INFO L130 PetriNetUnfolder]: 3423/6921 cut-off events. [2023-08-30 06:26:09,702 INFO L131 PetriNetUnfolder]: For 937279/937279 co-relation queries the response was YES. [2023-08-30 06:26:09,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85910 conditions, 6921 events. 3423/6921 cut-off events. For 937279/937279 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 58711 event pairs, 962 based on Foata normal form. 90/7011 useless extension candidates. Maximal degree in co-relation 85788. Up to 4362 conditions per place. [2023-08-30 06:26:09,797 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 756 selfloop transitions, 430 changer transitions 29/1215 dead transitions. [2023-08-30 06:26:09,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1215 transitions, 30083 flow [2023-08-30 06:26:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 06:26:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 06:26:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3254 transitions. [2023-08-30 06:26:09,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384853793289314 [2023-08-30 06:26:09,802 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3254 transitions. [2023-08-30 06:26:09,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3254 transitions. [2023-08-30 06:26:09,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:26:09,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3254 transitions. [2023-08-30 06:26:09,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 79.36585365853658) internal successors, (3254), 41 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:09,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 181.0) internal successors, (7602), 42 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:09,812 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 181.0) internal successors, (7602), 42 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:09,812 INFO L175 Difference]: Start difference. First operand has 379 places, 933 transitions, 22671 flow. Second operand 41 states and 3254 transitions. [2023-08-30 06:26:09,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1215 transitions, 30083 flow [2023-08-30 06:26:13,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1215 transitions, 29039 flow, removed 322 selfloop flow, removed 14 redundant places. [2023-08-30 06:26:13,762 INFO L231 Difference]: Finished difference. Result has 418 places, 1026 transitions, 25755 flow [2023-08-30 06:26:13,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=21624, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=25755, PETRI_PLACES=418, PETRI_TRANSITIONS=1026} [2023-08-30 06:26:13,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 389 predicate places. [2023-08-30 06:26:13,763 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1026 transitions, 25755 flow [2023-08-30 06:26:13,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.77777777777777) internal successors, (1364), 18 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:13,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:26:13,763 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:26:13,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-30 06:26:13,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:26:13,964 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:26:13,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:26:13,964 INFO L85 PathProgramCache]: Analyzing trace with hash 240469914, now seen corresponding path program 17 times [2023-08-30 06:26:13,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:26:13,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261707776] [2023-08-30 06:26:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:26:13,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:26:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:26:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:14,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:26:14,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261707776] [2023-08-30 06:26:14,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261707776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:26:14,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237810763] [2023-08-30 06:26:14,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:26:14,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:26:14,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:26:14,101 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:26:14,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 06:26:14,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 06:26:14,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:26:14,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:26:14,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:26:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:14,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:26:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:14,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237810763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:26:14,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:26:14,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 06:26:14,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008760965] [2023-08-30 06:26:14,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:26:14,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 06:26:14,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:26:14,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 06:26:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-30 06:26:14,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:26:14,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1026 transitions, 25755 flow. Second operand has 17 states, 17 states have (on average 75.76470588235294) internal successors, (1288), 17 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:14,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:26:14,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:26:14,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:26:19,627 INFO L130 PetriNetUnfolder]: 3683/7454 cut-off events. [2023-08-30 06:26:19,627 INFO L131 PetriNetUnfolder]: For 1096253/1096253 co-relation queries the response was YES. [2023-08-30 06:26:19,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95750 conditions, 7454 events. 3683/7454 cut-off events. For 1096253/1096253 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 63845 event pairs, 1403 based on Foata normal form. 80/7534 useless extension candidates. Maximal degree in co-relation 95618. Up to 5970 conditions per place. [2023-08-30 06:26:19,738 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 973 selfloop transitions, 252 changer transitions 24/1249 dead transitions. [2023-08-30 06:26:19,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1249 transitions, 32361 flow [2023-08-30 06:26:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 06:26:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 06:26:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2164 transitions. [2023-08-30 06:26:19,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4428074483323102 [2023-08-30 06:26:19,741 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2164 transitions. [2023-08-30 06:26:19,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2164 transitions. [2023-08-30 06:26:19,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:26:19,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2164 transitions. [2023-08-30 06:26:19,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 80.14814814814815) internal successors, (2164), 27 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:19,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 181.0) internal successors, (5068), 28 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:19,746 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 181.0) internal successors, (5068), 28 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:19,746 INFO L175 Difference]: Start difference. First operand has 418 places, 1026 transitions, 25755 flow. Second operand 27 states and 2164 transitions. [2023-08-30 06:26:19,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1249 transitions, 32361 flow [2023-08-30 06:26:25,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1249 transitions, 31838 flow, removed 206 selfloop flow, removed 20 redundant places. [2023-08-30 06:26:25,148 INFO L231 Difference]: Finished difference. Result has 432 places, 1090 transitions, 28054 flow [2023-08-30 06:26:25,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=25254, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28054, PETRI_PLACES=432, PETRI_TRANSITIONS=1090} [2023-08-30 06:26:25,149 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 403 predicate places. [2023-08-30 06:26:25,150 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1090 transitions, 28054 flow [2023-08-30 06:26:25,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.76470588235294) internal successors, (1288), 17 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:25,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:26:25,150 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:26:25,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 06:26:25,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 06:26:25,355 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:26:25,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:26:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1616663070, now seen corresponding path program 18 times [2023-08-30 06:26:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:26:25,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15450553] [2023-08-30 06:26:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:26:25,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:26:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:26:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:25,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:26:25,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15450553] [2023-08-30 06:26:25,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15450553] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:26:25,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045420731] [2023-08-30 06:26:25,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:26:25,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:26:25,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:26:25,499 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:26:25,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 06:26:25,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 06:26:25,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:26:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:26:25,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:26:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:25,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:26:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:25,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045420731] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:26:25,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:26:25,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 06:26:25,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978328116] [2023-08-30 06:26:25,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:26:25,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:26:25,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:26:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:26:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:26:25,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:26:25,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1090 transitions, 28054 flow. Second operand has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:25,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:26:25,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:26:25,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:26:30,610 INFO L130 PetriNetUnfolder]: 3970/7965 cut-off events. [2023-08-30 06:26:30,610 INFO L131 PetriNetUnfolder]: For 1197792/1197792 co-relation queries the response was YES. [2023-08-30 06:26:30,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102744 conditions, 7965 events. 3970/7965 cut-off events. For 1197792/1197792 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 68472 event pairs, 1534 based on Foata normal form. 112/8077 useless extension candidates. Maximal degree in co-relation 102606. Up to 6640 conditions per place. [2023-08-30 06:26:30,730 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1104 selfloop transitions, 271 changer transitions 4/1379 dead transitions. [2023-08-30 06:26:30,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1379 transitions, 36469 flow [2023-08-30 06:26:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 06:26:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 06:26:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2876 transitions. [2023-08-30 06:26:30,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44137507673419274 [2023-08-30 06:26:30,734 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2876 transitions. [2023-08-30 06:26:30,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2876 transitions. [2023-08-30 06:26:30,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:26:30,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2876 transitions. [2023-08-30 06:26:30,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 79.88888888888889) internal successors, (2876), 36 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:30,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 181.0) internal successors, (6697), 37 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:30,743 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 181.0) internal successors, (6697), 37 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:30,743 INFO L175 Difference]: Start difference. First operand has 432 places, 1090 transitions, 28054 flow. Second operand 36 states and 2876 transitions. [2023-08-30 06:26:30,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1379 transitions, 36469 flow [2023-08-30 06:26:36,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1379 transitions, 35863 flow, removed 230 selfloop flow, removed 11 redundant places. [2023-08-30 06:26:36,864 INFO L231 Difference]: Finished difference. Result has 470 places, 1194 transitions, 31713 flow [2023-08-30 06:26:36,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=27645, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31713, PETRI_PLACES=470, PETRI_TRANSITIONS=1194} [2023-08-30 06:26:36,866 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 441 predicate places. [2023-08-30 06:26:36,867 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 1194 transitions, 31713 flow [2023-08-30 06:26:36,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:36,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:26:36,867 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:26:36,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 06:26:37,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 06:26:37,072 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:26:37,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:26:37,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2023571842, now seen corresponding path program 19 times [2023-08-30 06:26:37,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:26:37,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862963897] [2023-08-30 06:26:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:26:37,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:26:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:26:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:26:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862963897] [2023-08-30 06:26:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862963897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:26:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934625707] [2023-08-30 06:26:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 06:26:37,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:26:37,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:26:37,292 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:26:37,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 06:26:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:26:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:26:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:26:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:37,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:26:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:37,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934625707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:26:37,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:26:37,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-30 06:26:37,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313769141] [2023-08-30 06:26:37,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:26:37,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 06:26:37,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:26:37,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 06:26:37,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-30 06:26:37,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:26:37,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 1194 transitions, 31713 flow. Second operand has 21 states, 21 states have (on average 75.61904761904762) internal successors, (1588), 21 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:37,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:26:37,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:26:37,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:26:43,492 INFO L130 PetriNetUnfolder]: 4415/9006 cut-off events. [2023-08-30 06:26:43,492 INFO L131 PetriNetUnfolder]: For 1625478/1625478 co-relation queries the response was YES. [2023-08-30 06:26:43,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122195 conditions, 9006 events. 4415/9006 cut-off events. For 1625478/1625478 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 80514 event pairs, 869 based on Foata normal form. 72/9078 useless extension candidates. Maximal degree in co-relation 122042. Up to 3346 conditions per place. [2023-08-30 06:26:43,670 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 686 selfloop transitions, 832 changer transitions 16/1534 dead transitions. [2023-08-30 06:26:43,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1534 transitions, 42054 flow [2023-08-30 06:26:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 06:26:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 06:26:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2753 transitions. [2023-08-30 06:26:43,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44735131621709456 [2023-08-30 06:26:43,674 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2753 transitions. [2023-08-30 06:26:43,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2753 transitions. [2023-08-30 06:26:43,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:26:43,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2753 transitions. [2023-08-30 06:26:43,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 80.97058823529412) internal successors, (2753), 34 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:43,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 181.0) internal successors, (6335), 35 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:43,684 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 181.0) internal successors, (6335), 35 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:43,684 INFO L175 Difference]: Start difference. First operand has 470 places, 1194 transitions, 31713 flow. Second operand 34 states and 2753 transitions. [2023-08-30 06:26:43,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1534 transitions, 42054 flow [2023-08-30 06:26:51,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1534 transitions, 41032 flow, removed 427 selfloop flow, removed 16 redundant places. [2023-08-30 06:26:51,711 INFO L231 Difference]: Finished difference. Result has 502 places, 1321 transitions, 37369 flow [2023-08-30 06:26:51,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=30711, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=714, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=37369, PETRI_PLACES=502, PETRI_TRANSITIONS=1321} [2023-08-30 06:26:51,713 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 473 predicate places. [2023-08-30 06:26:51,713 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1321 transitions, 37369 flow [2023-08-30 06:26:51,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.61904761904762) internal successors, (1588), 21 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:51,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:26:51,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:26:51,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:26:51,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:26:51,914 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:26:51,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:26:51,915 INFO L85 PathProgramCache]: Analyzing trace with hash 449480860, now seen corresponding path program 20 times [2023-08-30 06:26:51,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:26:51,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737687849] [2023-08-30 06:26:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:26:51,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:26:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:26:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:52,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:26:52,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737687849] [2023-08-30 06:26:52,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737687849] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:26:52,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969543732] [2023-08-30 06:26:52,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:26:52,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:26:52,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:26:52,061 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:26:52,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 06:26:52,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:26:52,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:26:52,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:26:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:26:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:52,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:26:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:26:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969543732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:26:52,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:26:52,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 06:26:52,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437876665] [2023-08-30 06:26:52,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:26:52,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:26:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:26:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:26:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:26:52,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:26:52,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1321 transitions, 37369 flow. Second operand has 16 states, 16 states have (on average 75.6875) internal successors, (1211), 16 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:52,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:26:52,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:26:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:26:58,461 INFO L130 PetriNetUnfolder]: 4652/9433 cut-off events. [2023-08-30 06:26:58,462 INFO L131 PetriNetUnfolder]: For 1949611/1949611 co-relation queries the response was YES. [2023-08-30 06:26:58,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133991 conditions, 9433 events. 4652/9433 cut-off events. For 1949611/1949611 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 84507 event pairs, 1943 based on Foata normal form. 148/9581 useless extension candidates. Maximal degree in co-relation 133822. Up to 8525 conditions per place. [2023-08-30 06:26:58,615 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1329 selfloop transitions, 206 changer transitions 4/1539 dead transitions. [2023-08-30 06:26:58,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1539 transitions, 44419 flow [2023-08-30 06:26:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 06:26:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 06:26:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2871 transitions. [2023-08-30 06:26:58,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44060773480662985 [2023-08-30 06:26:58,617 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2871 transitions. [2023-08-30 06:26:58,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2871 transitions. [2023-08-30 06:26:58,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:26:58,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2871 transitions. [2023-08-30 06:26:58,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 79.75) internal successors, (2871), 36 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:58,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 181.0) internal successors, (6697), 37 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:58,626 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 181.0) internal successors, (6697), 37 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:58,626 INFO L175 Difference]: Start difference. First operand has 502 places, 1321 transitions, 37369 flow. Second operand 36 states and 2871 transitions. [2023-08-30 06:26:58,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1539 transitions, 44419 flow [2023-08-30 06:27:09,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 1539 transitions, 43006 flow, removed 628 selfloop flow, removed 11 redundant places. [2023-08-30 06:27:09,084 INFO L231 Difference]: Finished difference. Result has 541 places, 1398 transitions, 39141 flow [2023-08-30 06:27:09,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=36484, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=39141, PETRI_PLACES=541, PETRI_TRANSITIONS=1398} [2023-08-30 06:27:09,085 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 512 predicate places. [2023-08-30 06:27:09,085 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1398 transitions, 39141 flow [2023-08-30 06:27:09,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.6875) internal successors, (1211), 16 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:09,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:27:09,086 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:27:09,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 06:27:09,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:27:09,289 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:27:09,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:27:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1191804774, now seen corresponding path program 21 times [2023-08-30 06:27:09,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:27:09,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497034687] [2023-08-30 06:27:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:27:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:27:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:27:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:27:09,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:27:09,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497034687] [2023-08-30 06:27:09,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497034687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:27:09,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722137329] [2023-08-30 06:27:09,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:27:09,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:27:09,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:27:09,497 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:27:09,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 06:27:09,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 06:27:09,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:27:09,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:27:09,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:27:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:27:09,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:27:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:27:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722137329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:27:09,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:27:09,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-30 06:27:09,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776411554] [2023-08-30 06:27:09,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:27:09,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 06:27:09,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:27:09,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 06:27:09,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-08-30 06:27:09,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:27:09,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1398 transitions, 39141 flow. Second operand has 21 states, 21 states have (on average 75.57142857142857) internal successors, (1587), 21 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:09,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:27:09,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:27:09,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:27:17,329 INFO L130 PetriNetUnfolder]: 4638/9381 cut-off events. [2023-08-30 06:27:17,329 INFO L131 PetriNetUnfolder]: For 2004047/2004047 co-relation queries the response was YES. [2023-08-30 06:27:17,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138750 conditions, 9381 events. 4638/9381 cut-off events. For 2004047/2004047 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 83857 event pairs, 358 based on Foata normal form. 22/9403 useless extension candidates. Maximal degree in co-relation 138570. Up to 2788 conditions per place. [2023-08-30 06:27:17,533 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 504 selfloop transitions, 1086 changer transitions 23/1613 dead transitions. [2023-08-30 06:27:17,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1613 transitions, 47154 flow [2023-08-30 06:27:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 06:27:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 06:27:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4168 transitions. [2023-08-30 06:27:17,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344834775357031 [2023-08-30 06:27:17,538 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4168 transitions. [2023-08-30 06:27:17,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4168 transitions. [2023-08-30 06:27:17,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:27:17,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4168 transitions. [2023-08-30 06:27:17,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 78.64150943396227) internal successors, (4168), 53 states have internal predecessors, (4168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:17,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 181.0) internal successors, (9774), 54 states have internal predecessors, (9774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:17,553 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 181.0) internal successors, (9774), 54 states have internal predecessors, (9774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:17,553 INFO L175 Difference]: Start difference. First operand has 541 places, 1398 transitions, 39141 flow. Second operand 53 states and 4168 transitions. [2023-08-30 06:27:17,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1613 transitions, 47154 flow [2023-08-30 06:27:32,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 1613 transitions, 45894 flow, removed 575 selfloop flow, removed 13 redundant places. [2023-08-30 06:27:32,367 INFO L231 Difference]: Finished difference. Result has 587 places, 1449 transitions, 42350 flow [2023-08-30 06:27:32,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=37991, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=42350, PETRI_PLACES=587, PETRI_TRANSITIONS=1449} [2023-08-30 06:27:32,368 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 558 predicate places. [2023-08-30 06:27:32,368 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 1449 transitions, 42350 flow [2023-08-30 06:27:32,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.57142857142857) internal successors, (1587), 21 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:32,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:27:32,369 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:27:32,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 06:27:32,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:27:32,570 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:27:32,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:27:32,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1221888988, now seen corresponding path program 22 times [2023-08-30 06:27:32,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:27:32,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288033446] [2023-08-30 06:27:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:27:32,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:27:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:27:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:27:32,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:27:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288033446] [2023-08-30 06:27:32,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288033446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:27:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165849356] [2023-08-30 06:27:32,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:27:32,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:27:32,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:27:32,694 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:27:32,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 06:27:32,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:27:32,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:27:32,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:27:32,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:27:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:27:32,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:27:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:27:32,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165849356] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:27:32,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:27:32,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 06:27:32,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419495010] [2023-08-30 06:27:32,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:27:32,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 06:27:32,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:27:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 06:27:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-30 06:27:33,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:27:33,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 1449 transitions, 42350 flow. Second operand has 17 states, 17 states have (on average 75.70588235294117) internal successors, (1287), 17 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:33,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:27:33,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:27:33,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:27:36,132 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 [] [2023-08-30 06:27:43,418 INFO L130 PetriNetUnfolder]: 4828/9711 cut-off events. [2023-08-30 06:27:43,418 INFO L131 PetriNetUnfolder]: For 2215888/2215888 co-relation queries the response was YES. [2023-08-30 06:27:43,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145749 conditions, 9711 events. 4828/9711 cut-off events. For 2215888/2215888 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 86625 event pairs, 1627 based on Foata normal form. 70/9781 useless extension candidates. Maximal degree in co-relation 145562. Up to 7457 conditions per place. [2023-08-30 06:27:43,608 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 1164 selfloop transitions, 454 changer transitions 23/1641 dead transitions. [2023-08-30 06:27:43,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1641 transitions, 49706 flow [2023-08-30 06:27:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 06:27:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 06:27:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2313 transitions. [2023-08-30 06:27:43,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44065536292627167 [2023-08-30 06:27:43,611 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2313 transitions. [2023-08-30 06:27:43,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2313 transitions. [2023-08-30 06:27:43,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:27:43,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2313 transitions. [2023-08-30 06:27:43,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.75862068965517) internal successors, (2313), 29 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:43,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 181.0) internal successors, (5430), 30 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:43,617 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 181.0) internal successors, (5430), 30 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:43,617 INFO L175 Difference]: Start difference. First operand has 587 places, 1449 transitions, 42350 flow. Second operand 29 states and 2313 transitions. [2023-08-30 06:27:43,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1641 transitions, 49706 flow [2023-08-30 06:27:57,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1641 transitions, 47967 flow, removed 642 selfloop flow, removed 19 redundant places. [2023-08-30 06:27:57,586 INFO L231 Difference]: Finished difference. Result has 603 places, 1516 transitions, 44666 flow [2023-08-30 06:27:57,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=40954, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=44666, PETRI_PLACES=603, PETRI_TRANSITIONS=1516} [2023-08-30 06:27:57,587 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 574 predicate places. [2023-08-30 06:27:57,587 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 1516 transitions, 44666 flow [2023-08-30 06:27:57,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.70588235294117) internal successors, (1287), 17 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:57,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:27:57,588 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:27:57,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 06:27:57,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 06:27:57,789 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:27:57,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:27:57,789 INFO L85 PathProgramCache]: Analyzing trace with hash 961747000, now seen corresponding path program 23 times [2023-08-30 06:27:57,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:27:57,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824821509] [2023-08-30 06:27:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:27:57,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:27:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:27:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:27:57,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:27:57,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824821509] [2023-08-30 06:27:57,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824821509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:27:57,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858946604] [2023-08-30 06:27:57,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:27:57,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:27:57,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:27:57,933 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:27:57,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 06:27:58,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 06:27:58,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:27:58,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 06:27:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:27:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:27:58,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:27:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:27:58,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858946604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:27:58,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:27:58,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-08-30 06:27:58,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106551484] [2023-08-30 06:27:58,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:27:58,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:27:58,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:27:58,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:27:58,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:27:58,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 06:27:58,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 1516 transitions, 44666 flow. Second operand has 14 states, 14 states have (on average 82.64285714285714) internal successors, (1157), 14 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:58,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:27:58,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 06:27:58,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:06,600 INFO L130 PetriNetUnfolder]: 6070/12277 cut-off events. [2023-08-30 06:28:06,600 INFO L131 PetriNetUnfolder]: For 2967057/2967067 co-relation queries the response was YES. [2023-08-30 06:28:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191605 conditions, 12277 events. 6070/12277 cut-off events. For 2967057/2967067 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 113934 event pairs, 747 based on Foata normal form. 234/12507 useless extension candidates. Maximal degree in co-relation 191409. Up to 6071 conditions per place. [2023-08-30 06:28:06,839 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 1135 selfloop transitions, 733 changer transitions 159/2040 dead transitions. [2023-08-30 06:28:06,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 2040 transitions, 64283 flow [2023-08-30 06:28:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:28:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:28:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 715 transitions. [2023-08-30 06:28:06,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937845303867403 [2023-08-30 06:28:06,840 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 715 transitions. [2023-08-30 06:28:06,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 715 transitions. [2023-08-30 06:28:06,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:06,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 715 transitions. [2023-08-30 06:28:06,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 89.375) internal successors, (715), 8 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:06,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 181.0) internal successors, (1629), 9 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:06,919 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 181.0) internal successors, (1629), 9 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:06,919 INFO L175 Difference]: Start difference. First operand has 603 places, 1516 transitions, 44666 flow. Second operand 8 states and 715 transitions. [2023-08-30 06:28:06,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 2040 transitions, 64283 flow [2023-08-30 06:28:27,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 2040 transitions, 63829 flow, removed 122 selfloop flow, removed 22 redundant places. [2023-08-30 06:28:27,594 INFO L231 Difference]: Finished difference. Result has 591 places, 1736 transitions, 55511 flow [2023-08-30 06:28:27,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=44088, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=55511, PETRI_PLACES=591, PETRI_TRANSITIONS=1736} [2023-08-30 06:28:27,596 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 562 predicate places. [2023-08-30 06:28:27,596 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 1736 transitions, 55511 flow [2023-08-30 06:28:27,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.64285714285714) internal successors, (1157), 14 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:27,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:27,597 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:28:27,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 06:28:27,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 06:28:27,802 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:28:27,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1554877759, now seen corresponding path program 24 times [2023-08-30 06:28:27,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:28:27,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731252681] [2023-08-30 06:28:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:27,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:28:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:28:27,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:28:27,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731252681] [2023-08-30 06:28:27,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731252681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:28:27,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805936090] [2023-08-30 06:28:27,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:28:27,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:28:27,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:28:27,976 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:28:27,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 06:28:28,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 06:28:28,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:28:28,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:28:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:28:28,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:28:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:28:28,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805936090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:28:28,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:28:28,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-30 06:28:28,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301692266] [2023-08-30 06:28:28,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:28:28,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 06:28:28,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:28:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 06:28:28,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-08-30 06:28:28,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:28:28,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 1736 transitions, 55511 flow. Second operand has 19 states, 19 states have (on average 75.78947368421052) internal successors, (1440), 19 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:28,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:28,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:28:28,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:45,062 INFO L130 PetriNetUnfolder]: 10069/20497 cut-off events. [2023-08-30 06:28:45,063 INFO L131 PetriNetUnfolder]: For 5101647/5101647 co-relation queries the response was YES. [2023-08-30 06:28:45,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322125 conditions, 20497 events. 10069/20497 cut-off events. For 5101647/5101647 co-relation queries the response was YES. Maximal size of possible extension queue 1635. Compared 204814 event pairs, 1561 based on Foata normal form. 190/20687 useless extension candidates. Maximal degree in co-relation 321928. Up to 7486 conditions per place. [2023-08-30 06:28:45,952 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 2668 selfloop transitions, 665 changer transitions 3/3336 dead transitions. [2023-08-30 06:28:45,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 3336 transitions, 109753 flow [2023-08-30 06:28:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 06:28:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 06:28:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2103 transitions. [2023-08-30 06:28:45,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468763280917977 [2023-08-30 06:28:45,955 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2103 transitions. [2023-08-30 06:28:45,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2103 transitions. [2023-08-30 06:28:45,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:45,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2103 transitions. [2023-08-30 06:28:45,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 80.88461538461539) internal successors, (2103), 26 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:45,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:45,962 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:45,962 INFO L175 Difference]: Start difference. First operand has 591 places, 1736 transitions, 55511 flow. Second operand 26 states and 2103 transitions. [2023-08-30 06:28:45,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 3336 transitions, 109753 flow [2023-08-30 06:29:30,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 3336 transitions, 107898 flow, removed 834 selfloop flow, removed 12 redundant places. [2023-08-30 06:29:30,359 INFO L231 Difference]: Finished difference. Result has 597 places, 2139 transitions, 68638 flow [2023-08-30 06:29:30,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=54528, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=68638, PETRI_PLACES=597, PETRI_TRANSITIONS=2139} [2023-08-30 06:29:30,360 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 568 predicate places. [2023-08-30 06:29:30,360 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 2139 transitions, 68638 flow [2023-08-30 06:29:30,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.78947368421052) internal successors, (1440), 19 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:30,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:30,361 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:29:30,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 06:29:30,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 06:29:30,561 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:29:30,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:30,562 INFO L85 PathProgramCache]: Analyzing trace with hash 153141877, now seen corresponding path program 25 times [2023-08-30 06:29:30,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:29:30,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051708409] [2023-08-30 06:29:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:30,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:29:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:30,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:29:30,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051708409] [2023-08-30 06:29:30,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051708409] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:29:30,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414168857] [2023-08-30 06:29:30,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 06:29:30,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:29:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:29:30,721 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:29:30,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 06:29:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:30,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:29:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:30,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:29:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:31,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414168857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:29:31,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:29:31,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-08-30 06:29:31,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787039244] [2023-08-30 06:29:31,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:29:31,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 06:29:31,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:29:31,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 06:29:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-30 06:29:31,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:29:31,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 2139 transitions, 68638 flow. Second operand has 20 states, 20 states have (on average 75.7) internal successors, (1514), 20 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:31,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:31,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:29:31,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:52,105 INFO L130 PetriNetUnfolder]: 10552/21408 cut-off events. [2023-08-30 06:29:52,105 INFO L131 PetriNetUnfolder]: For 4906645/4906645 co-relation queries the response was YES. [2023-08-30 06:29:52,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333262 conditions, 21408 events. 10552/21408 cut-off events. For 4906645/4906645 co-relation queries the response was YES. Maximal size of possible extension queue 1730. Compared 215071 event pairs, 1615 based on Foata normal form. 224/21632 useless extension candidates. Maximal degree in co-relation 333064. Up to 7674 conditions per place. [2023-08-30 06:29:52,895 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 2813 selfloop transitions, 829 changer transitions 3/3645 dead transitions. [2023-08-30 06:29:52,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 3645 transitions, 119359 flow [2023-08-30 06:29:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-30 06:29:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-30 06:29:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4652 transitions. [2023-08-30 06:29:52,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44313202514764716 [2023-08-30 06:29:52,899 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4652 transitions. [2023-08-30 06:29:52,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4652 transitions. [2023-08-30 06:29:52,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:52,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4652 transitions. [2023-08-30 06:29:52,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 80.20689655172414) internal successors, (4652), 58 states have internal predecessors, (4652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:52,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 181.0) internal successors, (10679), 59 states have internal predecessors, (10679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:52,913 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 181.0) internal successors, (10679), 59 states have internal predecessors, (10679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:52,913 INFO L175 Difference]: Start difference. First operand has 597 places, 2139 transitions, 68638 flow. Second operand 58 states and 4652 transitions. [2023-08-30 06:29:52,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 3645 transitions, 119359 flow [2023-08-30 06:30:41,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 3645 transitions, 116634 flow, removed 1185 selfloop flow, removed 13 redundant places. [2023-08-30 06:30:41,626 INFO L231 Difference]: Finished difference. Result has 653 places, 2364 transitions, 77014 flow [2023-08-30 06:30:41,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=66670, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=650, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=77014, PETRI_PLACES=653, PETRI_TRANSITIONS=2364} [2023-08-30 06:30:41,629 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 624 predicate places. [2023-08-30 06:30:41,629 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 2364 transitions, 77014 flow [2023-08-30 06:30:41,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 75.7) internal successors, (1514), 20 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:41,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:30:41,629 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:30:41,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 06:30:41,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:30:41,830 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:30:41,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:30:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1761027897, now seen corresponding path program 26 times [2023-08-30 06:30:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:30:41,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461078712] [2023-08-30 06:30:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:30:41,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:30:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:30:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:42,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:30:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461078712] [2023-08-30 06:30:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461078712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:30:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442121241] [2023-08-30 06:30:42,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:30:42,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:30:42,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:30:42,009 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:30:42,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 06:30:42,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:30:42,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:30:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:30:42,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:30:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:42,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:30:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:42,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442121241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:30:42,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:30:42,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 06:30:42,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027341739] [2023-08-30 06:30:42,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:30:42,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 06:30:42,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:30:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 06:30:42,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-08-30 06:30:42,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:30:42,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 2364 transitions, 77014 flow. Second operand has 23 states, 23 states have (on average 75.47826086956522) internal successors, (1736), 23 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:42,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:30:42,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:30:42,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:30:52,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 06:31:03,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 06:31:52,755 INFO L130 PetriNetUnfolder]: 11975/24609 cut-off events. [2023-08-30 06:31:52,756 INFO L131 PetriNetUnfolder]: For 7220658/7220658 co-relation queries the response was YES. [2023-08-30 06:31:53,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418962 conditions, 24609 events. 11975/24609 cut-off events. For 7220658/7220658 co-relation queries the response was YES. Maximal size of possible extension queue 1953. Compared 254850 event pairs, 356 based on Foata normal form. 92/24701 useless extension candidates. Maximal degree in co-relation 418758. Up to 6159 conditions per place. [2023-08-30 06:31:53,369 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 892 selfloop transitions, 3348 changer transitions 67/4307 dead transitions. [2023-08-30 06:31:53,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 4307 transitions, 149159 flow [2023-08-30 06:31:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-08-30 06:31:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-08-30 06:31:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 9232 transitions. [2023-08-30 06:31:53,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43970280053343497 [2023-08-30 06:31:53,377 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 9232 transitions. [2023-08-30 06:31:53,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 9232 transitions. [2023-08-30 06:31:53,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:31:53,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 9232 transitions. [2023-08-30 06:31:53,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 79.58620689655173) internal successors, (9232), 116 states have internal predecessors, (9232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:53,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 181.0) internal successors, (21177), 117 states have internal predecessors, (21177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:53,402 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 181.0) internal successors, (21177), 117 states have internal predecessors, (21177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:53,402 INFO L175 Difference]: Start difference. First operand has 653 places, 2364 transitions, 77014 flow. Second operand 116 states and 9232 transitions. [2023-08-30 06:31:53,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 4307 transitions, 149159 flow [2023-08-30 06:33:08,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 752 places, 4307 transitions, 146177 flow, removed 1371 selfloop flow, removed 16 redundant places. [2023-08-30 06:33:08,754 INFO L231 Difference]: Finished difference. Result has 791 places, 3679 transitions, 131655 flow [2023-08-30 06:33:08,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=74552, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2086, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=131655, PETRI_PLACES=791, PETRI_TRANSITIONS=3679} [2023-08-30 06:33:08,757 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 762 predicate places. [2023-08-30 06:33:08,757 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 3679 transitions, 131655 flow [2023-08-30 06:33:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.47826086956522) internal successors, (1736), 23 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:08,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:33:08,757 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:33:08,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 06:33:08,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 06:33:08,958 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:33:08,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:33:08,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1266059565, now seen corresponding path program 27 times [2023-08-30 06:33:08,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:33:08,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842381604] [2023-08-30 06:33:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:33:08,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:33:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:33:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:33:09,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:33:09,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842381604] [2023-08-30 06:33:09,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842381604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:33:09,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126835480] [2023-08-30 06:33:09,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:33:09,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:33:09,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:33:09,154 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:33:09,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 06:33:09,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:33:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:33:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:33:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:33:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:33:09,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:33:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:33:09,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126835480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:33:09,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:33:09,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-30 06:33:09,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384730146] [2023-08-30 06:33:09,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:33:09,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 06:33:09,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:33:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 06:33:09,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-08-30 06:33:09,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:33:09,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 3679 transitions, 131655 flow. Second operand has 21 states, 21 states have (on average 75.66666666666667) internal successors, (1589), 21 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:09,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:33:09,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:33:09,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:34:19,284 INFO L130 PetriNetUnfolder]: 12400/25172 cut-off events. [2023-08-30 06:34:19,284 INFO L131 PetriNetUnfolder]: For 11201364/11201364 co-relation queries the response was YES. [2023-08-30 06:34:20,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464065 conditions, 25172 events. 12400/25172 cut-off events. For 11201364/11201364 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 258582 event pairs, 1715 based on Foata normal form. 266/25438 useless extension candidates. Maximal degree in co-relation 463822. Up to 8645 conditions per place. [2023-08-30 06:34:20,544 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 3033 selfloop transitions, 1289 changer transitions 49/4371 dead transitions. [2023-08-30 06:34:20,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 4371 transitions, 156639 flow [2023-08-30 06:34:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 06:34:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 06:34:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5128 transitions. [2023-08-30 06:34:20,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44267955801104975 [2023-08-30 06:34:20,549 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5128 transitions. [2023-08-30 06:34:20,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5128 transitions. [2023-08-30 06:34:20,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:34:20,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5128 transitions. [2023-08-30 06:34:20,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 80.125) internal successors, (5128), 64 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:20,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 181.0) internal successors, (11765), 65 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:20,565 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 181.0) internal successors, (11765), 65 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:20,565 INFO L175 Difference]: Start difference. First operand has 791 places, 3679 transitions, 131655 flow. Second operand 64 states and 5128 transitions. [2023-08-30 06:34:20,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 4371 transitions, 156639 flow [2023-08-30 06:36:57,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 827 places, 4371 transitions, 143060 flow, removed 6298 selfloop flow, removed 26 redundant places. [2023-08-30 06:36:58,026 INFO L231 Difference]: Finished difference. Result has 840 places, 3868 transitions, 128874 flow [2023-08-30 06:36:58,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=119071, PETRI_DIFFERENCE_MINUEND_PLACES=764, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=128874, PETRI_PLACES=840, PETRI_TRANSITIONS=3868} [2023-08-30 06:36:58,030 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 811 predicate places. [2023-08-30 06:36:58,030 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 3868 transitions, 128874 flow [2023-08-30 06:36:58,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.66666666666667) internal successors, (1589), 21 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:58,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:58,031 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:36:58,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:58,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 06:36:58,236 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:36:58,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash -930875309, now seen corresponding path program 28 times [2023-08-30 06:36:58,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:36:58,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972769873] [2023-08-30 06:36:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:58,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:36:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:58,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:36:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972769873] [2023-08-30 06:36:58,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972769873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:36:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926521328] [2023-08-30 06:36:58,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:36:58,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:36:58,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:36:58,424 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:36:58,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 06:36:58,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:36:58,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:36:58,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:36:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:58,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:36:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:58,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926521328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:36:58,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:36:58,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 06:36:58,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882311222] [2023-08-30 06:36:58,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:36:58,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 06:36:58,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:36:58,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 06:36:58,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-08-30 06:36:59,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 06:36:59,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 3868 transitions, 128874 flow. Second operand has 23 states, 23 states have (on average 75.6086956521739) internal successors, (1739), 23 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:59,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:59,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 06:36:59,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:37:03,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 06:37:40,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 06:38:23,833 INFO L130 PetriNetUnfolder]: 13756/28279 cut-off events. [2023-08-30 06:38:23,833 INFO L131 PetriNetUnfolder]: For 15144222/15144222 co-relation queries the response was YES. [2023-08-30 06:38:25,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539619 conditions, 28279 events. 13756/28279 cut-off events. For 15144222/15144222 co-relation queries the response was YES. Maximal size of possible extension queue 2096. Compared 295965 event pairs, 976 based on Foata normal form. 242/28521 useless extension candidates. Maximal degree in co-relation 539366. Up to 6837 conditions per place. [2023-08-30 06:38:25,485 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1654 selfloop transitions, 3196 changer transitions 25/4875 dead transitions. [2023-08-30 06:38:25,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 4875 transitions, 168270 flow [2023-08-30 06:38:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-08-30 06:38:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-08-30 06:38:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 7557 transitions. [2023-08-30 06:38:25,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441636299518044 [2023-08-30 06:38:25,493 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 7557 transitions. [2023-08-30 06:38:25,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 7557 transitions. [2023-08-30 06:38:25,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:38:25,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 7557 transitions. [2023-08-30 06:38:25,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 80.3936170212766) internal successors, (7557), 94 states have internal predecessors, (7557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:25,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 181.0) internal successors, (17195), 95 states have internal predecessors, (17195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:25,513 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 181.0) internal successors, (17195), 95 states have internal predecessors, (17195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:25,513 INFO L175 Difference]: Start difference. First operand has 840 places, 3868 transitions, 128874 flow. Second operand 94 states and 7557 transitions. [2023-08-30 06:38:25,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 4875 transitions, 168270 flow Killed by 15