./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8 --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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:31:32,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:31:32,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:31:32,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:31:32,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:31:32,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:31:32,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:31:32,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:31:32,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:31:32,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:31:32,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:31:32,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:31:32,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:31:32,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:31:32,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:31:32,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:31:32,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:31:32,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:31:32,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:31:32,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:31:32,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:31:32,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:31:32,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:31:32,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:31:32,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:31:32,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:31:32,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:31:32,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:31:32,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:31:32,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:31:32,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:31:32,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:31:32,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:31:32,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:31:32,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:31:32,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:31:32,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:31:32,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:31:32,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:31:32,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:31:32,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:31:32,248 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 16:31:32,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:31:32,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:31:32,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:31:32,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:31:32,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:31:32,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:31:32,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:31:32,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:31:32,271 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:31:32,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:31:32,271 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:31:32,271 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:31:32,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:31:32,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:31:32,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:31:32,272 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:31:32,272 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:31:32,272 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:31:32,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:31:32,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:31:32,272 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:31:32,273 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:31:32,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:31:32,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:31:32,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:31:32,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:31:32,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:31:32,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:31:32,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:31:32,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:31:32,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:31:32,274 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:31:32,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:31:32,274 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:31:32,274 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-12-13 16:31:32,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:31:32,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:31:32,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:31:32,491 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:31:32,492 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:31:32,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-12-13 16:31:35,023 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:31:35,264 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:31:35,265 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/sv-benchmarks/c/pthread/stack_longest-2.i [2022-12-13 16:31:35,277 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/data/cf4a83853/1ab940f00b724bf99c8f7281cf6f0262/FLAG125b4fc92 [2022-12-13 16:31:35,605 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/data/cf4a83853/1ab940f00b724bf99c8f7281cf6f0262 [2022-12-13 16:31:35,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:31:35,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:31:35,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:31:35,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:31:35,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:31:35,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:31:35" (1/1) ... [2022-12-13 16:31:35,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e88358a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:35, skipping insertion in model container [2022-12-13 16:31:35,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:31:35" (1/1) ... [2022-12-13 16:31:35,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:31:35,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:31:35,964 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-12-13 16:31:35,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:31:35,996 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:31:36,031 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-12-13 16:31:36,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:31:36,085 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:31:36,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36 WrapperNode [2022-12-13 16:31:36,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:31:36,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:31:36,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:31:36,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:31:36,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,136 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-12-13 16:31:36,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:31:36,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:31:36,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:31:36,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:31:36,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,160 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:31:36,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:31:36,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:31:36,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:31:36,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (1/1) ... [2022-12-13 16:31:36,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:31:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:36,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:31:36,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:31:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 16:31:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 16:31:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 16:31:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 16:31:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:31:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:31:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:31:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:31:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 16:31:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:31:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:31:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:31:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:31:36,219 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 16:31:36,322 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:31:36,324 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:31:36,539 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:31:36,545 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:31:36,545 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 16:31:36,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:31:36 BoogieIcfgContainer [2022-12-13 16:31:36,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:31:36,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:31:36,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:31:36,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:31:36,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:31:35" (1/3) ... [2022-12-13 16:31:36,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efa3974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:31:36, skipping insertion in model container [2022-12-13 16:31:36,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:31:36" (2/3) ... [2022-12-13 16:31:36,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efa3974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:31:36, skipping insertion in model container [2022-12-13 16:31:36,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:31:36" (3/3) ... [2022-12-13 16:31:36,554 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-12-13 16:31:36,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:31:36,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-13 16:31:36,571 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:31:36,647 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:31:36,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 186 transitions, 388 flow [2022-12-13 16:31:36,735 INFO L130 PetriNetUnfolder]: 10/184 cut-off events. [2022-12-13 16:31:36,735 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:31:36,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 10/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 485 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2022-12-13 16:31:36,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 186 transitions, 388 flow [2022-12-13 16:31:36,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 179 transitions, 370 flow [2022-12-13 16:31:36,747 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:31:36,758 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 179 transitions, 370 flow [2022-12-13 16:31:36,760 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 179 transitions, 370 flow [2022-12-13 16:31:36,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 179 transitions, 370 flow [2022-12-13 16:31:36,787 INFO L130 PetriNetUnfolder]: 10/179 cut-off events. [2022-12-13 16:31:36,787 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:31:36,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 179 events. 10/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 472 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2022-12-13 16:31:36,791 INFO L119 LiptonReduction]: Number of co-enabled transitions 9804 [2022-12-13 16:31:40,318 INFO L134 LiptonReduction]: Checked pairs total: 14340 [2022-12-13 16:31:40,318 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-12-13 16:31:40,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:31:40,332 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;@23929098, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:31:40,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-12-13 16:31:40,334 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 16:31:40,334 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:31:40,334 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:40,334 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 16:31:40,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:40,338 INFO L85 PathProgramCache]: Analyzing trace with hash 757, now seen corresponding path program 1 times [2022-12-13 16:31:40,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416117644] [2022-12-13 16:31:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:40,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:40,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:40,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416117644] [2022-12-13 16:31:40,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416117644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:40,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:40,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 16:31:40,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988149504] [2022-12-13 16:31:40,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:40,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 16:31:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 16:31:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:31:40,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 369 [2022-12-13 16:31:40,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 175.5) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:40,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:40,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 369 [2022-12-13 16:31:40,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:40,672 INFO L130 PetriNetUnfolder]: 1353/2104 cut-off events. [2022-12-13 16:31:40,673 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-12-13 16:31:40,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4228 conditions, 2104 events. 1353/2104 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9586 event pairs, 1085 based on Foata normal form. 0/1186 useless extension candidates. Maximal degree in co-relation 3976. Up to 2081 conditions per place. [2022-12-13 16:31:40,684 INFO L137 encePairwiseOnDemand]: 367/369 looper letters, 43 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2022-12-13 16:31:40,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 186 flow [2022-12-13 16:31:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 16:31:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 16:31:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 395 transitions. [2022-12-13 16:31:40,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.535230352303523 [2022-12-13 16:31:40,697 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 395 transitions. [2022-12-13 16:31:40,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 395 transitions. [2022-12-13 16:31:40,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:40,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 395 transitions. [2022-12-13 16:31:40,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 197.5) internal successors, (395), 2 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:40,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:40,710 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:40,712 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 395 transitions. [2022-12-13 16:31:40,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 186 flow [2022-12-13 16:31:40,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 178 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 16:31:40,716 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2022-12-13 16:31:40,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2022-12-13 16:31:40,721 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-12-13 16:31:40,721 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2022-12-13 16:31:40,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 175.5) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:40,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:40,721 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 16:31:40,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:31:40,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash 742993, now seen corresponding path program 1 times [2022-12-13 16:31:40,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:40,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224333497] [2022-12-13 16:31:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:40,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:40,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:40,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224333497] [2022-12-13 16:31:40,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224333497] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:40,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:40,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:31:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469579796] [2022-12-13 16:31:40,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:40,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:31:40,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:40,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:31:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:31:40,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 369 [2022-12-13 16:31:40,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:40,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:40,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 369 [2022-12-13 16:31:40,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:41,057 INFO L130 PetriNetUnfolder]: 1325/2051 cut-off events. [2022-12-13 16:31:41,057 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 16:31:41,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4094 conditions, 2051 events. 1325/2051 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9220 event pairs, 1062 based on Foata normal form. 0/1168 useless extension candidates. Maximal degree in co-relation 4091. Up to 2026 conditions per place. [2022-12-13 16:31:41,070 INFO L137 encePairwiseOnDemand]: 365/369 looper letters, 39 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-12-13 16:31:41,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 170 flow [2022-12-13 16:31:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-12-13 16:31:41,073 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48870822041553746 [2022-12-13 16:31:41,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-12-13 16:31:41,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-12-13 16:31:41,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:41,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-12-13 16:31:41,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,079 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 541 transitions. [2022-12-13 16:31:41,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 170 flow [2022-12-13 16:31:41,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:31:41,080 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2022-12-13 16:31:41,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-12-13 16:31:41,081 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-12-13 16:31:41,081 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2022-12-13 16:31:41,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:41,081 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 16:31:41,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:31:41,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:41,082 INFO L85 PathProgramCache]: Analyzing trace with hash 742994, now seen corresponding path program 1 times [2022-12-13 16:31:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:41,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526666122] [2022-12-13 16:31:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:41,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:41,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526666122] [2022-12-13 16:31:41,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526666122] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:41,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:41,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:31:41,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723735743] [2022-12-13 16:31:41,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:41,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:31:41,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:31:41,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:31:41,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 369 [2022-12-13 16:31:41,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:41,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 369 [2022-12-13 16:31:41,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:41,366 INFO L130 PetriNetUnfolder]: 1297/1998 cut-off events. [2022-12-13 16:31:41,366 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 16:31:41,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3991 conditions, 1998 events. 1297/1998 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8886 event pairs, 1039 based on Foata normal form. 0/1150 useless extension candidates. Maximal degree in co-relation 3987. Up to 1973 conditions per place. [2022-12-13 16:31:41,373 INFO L137 encePairwiseOnDemand]: 365/369 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-12-13 16:31:41,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2022-12-13 16:31:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:41,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2022-12-13 16:31:41,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4977416440831075 [2022-12-13 16:31:41,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2022-12-13 16:31:41,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2022-12-13 16:31:41,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:41,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2022-12-13 16:31:41,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,378 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 551 transitions. [2022-12-13 16:31:41,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2022-12-13 16:31:41,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:31:41,379 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2022-12-13 16:31:41,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-12-13 16:31:41,379 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-12-13 16:31:41,379 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2022-12-13 16:31:41,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:41,380 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:31:41,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:31:41,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:41,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash 714032781, now seen corresponding path program 1 times [2022-12-13 16:31:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:41,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713884328] [2022-12-13 16:31:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:41,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:41,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:41,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713884328] [2022-12-13 16:31:41,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713884328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:41,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:41,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:31:41,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713271294] [2022-12-13 16:31:41,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:41,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:31:41,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:31:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:31:41,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 369 [2022-12-13 16:31:41,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:41,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 369 [2022-12-13 16:31:41,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:41,630 INFO L130 PetriNetUnfolder]: 948/1487 cut-off events. [2022-12-13 16:31:41,630 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 16:31:41,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2975 conditions, 1487 events. 948/1487 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6364 event pairs, 752 based on Foata normal form. 0/924 useless extension candidates. Maximal degree in co-relation 2971. Up to 1468 conditions per place. [2022-12-13 16:31:41,634 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-12-13 16:31:41,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2022-12-13 16:31:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2022-12-13 16:31:41,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2022-12-13 16:31:41,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2022-12-13 16:31:41,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2022-12-13 16:31:41,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:41,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2022-12-13 16:31:41,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,639 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 549 transitions. [2022-12-13 16:31:41,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2022-12-13 16:31:41,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:31:41,640 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2022-12-13 16:31:41,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-12-13 16:31:41,641 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-12-13 16:31:41,641 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2022-12-13 16:31:41,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:41,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:31:41,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:31:41,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash 714032780, now seen corresponding path program 1 times [2022-12-13 16:31:41,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:41,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563035046] [2022-12-13 16:31:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:41,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:41,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563035046] [2022-12-13 16:31:41,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563035046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:41,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:41,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:31:41,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661905484] [2022-12-13 16:31:41,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:41,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:31:41,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:31:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:31:41,749 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2022-12-13 16:31:41,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:41,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2022-12-13 16:31:41,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:41,856 INFO L130 PetriNetUnfolder]: 599/976 cut-off events. [2022-12-13 16:31:41,856 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 16:31:41,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1959 conditions, 976 events. 599/976 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3988 event pairs, 465 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1955. Up to 963 conditions per place. [2022-12-13 16:31:41,859 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 35 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-12-13 16:31:41,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 158 flow [2022-12-13 16:31:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-12-13 16:31:41,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47335140018066846 [2022-12-13 16:31:41,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-12-13 16:31:41,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-12-13 16:31:41,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:41,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-12-13 16:31:41,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,863 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 524 transitions. [2022-12-13 16:31:41,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 158 flow [2022-12-13 16:31:41,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:31:41,864 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2022-12-13 16:31:41,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-12-13 16:31:41,864 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2022-12-13 16:31:41,864 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2022-12-13 16:31:41,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:41,865 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:31:41,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:31:41,865 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash 659107856, now seen corresponding path program 1 times [2022-12-13 16:31:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:41,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168258261] [2022-12-13 16:31:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:41,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:41,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168258261] [2022-12-13 16:31:41,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168258261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:41,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:41,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:31:41,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688052800] [2022-12-13 16:31:41,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:41,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:31:41,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:31:41,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:31:41,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 369 [2022-12-13 16:31:41,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:41,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:41,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 369 [2022-12-13 16:31:41,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:42,057 INFO L130 PetriNetUnfolder]: 790/1311 cut-off events. [2022-12-13 16:31:42,057 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 16:31:42,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2637 conditions, 1311 events. 790/1311 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5250 event pairs, 361 based on Foata normal form. 26/969 useless extension candidates. Maximal degree in co-relation 2633. Up to 880 conditions per place. [2022-12-13 16:31:42,065 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 58 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2022-12-13 16:31:42,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 62 transitions, 259 flow [2022-12-13 16:31:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-12-13 16:31:42,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2022-12-13 16:31:42,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-12-13 16:31:42,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-12-13 16:31:42,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:42,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-12-13 16:31:42,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,069 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 3 states and 567 transitions. [2022-12-13 16:31:42,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 62 transitions, 259 flow [2022-12-13 16:31:42,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 62 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:31:42,071 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 97 flow [2022-12-13 16:31:42,071 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-12-13 16:31:42,072 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-12-13 16:31:42,072 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 97 flow [2022-12-13 16:31:42,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:42,073 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:31:42,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:31:42,073 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:42,073 INFO L85 PathProgramCache]: Analyzing trace with hash 659106569, now seen corresponding path program 1 times [2022-12-13 16:31:42,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:42,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206950257] [2022-12-13 16:31:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:42,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:42,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:42,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206950257] [2022-12-13 16:31:42,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206950257] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:42,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:42,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:31:42,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978912289] [2022-12-13 16:31:42,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:42,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:31:42,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:42,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:31:42,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:31:42,251 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 369 [2022-12-13 16:31:42,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:42,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 369 [2022-12-13 16:31:42,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:42,410 INFO L130 PetriNetUnfolder]: 750/1250 cut-off events. [2022-12-13 16:31:42,410 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 16:31:42,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2638 conditions, 1250 events. 750/1250 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5059 event pairs, 277 based on Foata normal form. 0/982 useless extension candidates. Maximal degree in co-relation 2633. Up to 1150 conditions per place. [2022-12-13 16:31:42,415 INFO L137 encePairwiseOnDemand]: 365/369 looper letters, 46 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2022-12-13 16:31:42,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 224 flow [2022-12-13 16:31:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:31:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:31:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 722 transitions. [2022-12-13 16:31:42,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.489159891598916 [2022-12-13 16:31:42,418 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 722 transitions. [2022-12-13 16:31:42,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 722 transitions. [2022-12-13 16:31:42,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:42,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 722 transitions. [2022-12-13 16:31:42,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,423 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,423 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 97 flow. Second operand 4 states and 722 transitions. [2022-12-13 16:31:42,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 224 flow [2022-12-13 16:31:42,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:31:42,425 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 109 flow [2022-12-13 16:31:42,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2022-12-13 16:31:42,426 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2022-12-13 16:31:42,426 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 109 flow [2022-12-13 16:31:42,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,426 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:42,427 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:31:42,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:31:42,427 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:42,427 INFO L85 PathProgramCache]: Analyzing trace with hash 659106570, now seen corresponding path program 1 times [2022-12-13 16:31:42,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:42,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178164641] [2022-12-13 16:31:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:42,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:42,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:42,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178164641] [2022-12-13 16:31:42,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178164641] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:42,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:42,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:31:42,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959646482] [2022-12-13 16:31:42,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:42,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:31:42,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:42,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:31:42,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:31:42,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 369 [2022-12-13 16:31:42,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:42,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 369 [2022-12-13 16:31:42,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:42,882 INFO L130 PetriNetUnfolder]: 789/1328 cut-off events. [2022-12-13 16:31:42,882 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2022-12-13 16:31:42,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1328 events. 789/1328 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5568 event pairs, 313 based on Foata normal form. 0/1102 useless extension candidates. Maximal degree in co-relation 2831. Up to 1099 conditions per place. [2022-12-13 16:31:42,886 INFO L137 encePairwiseOnDemand]: 365/369 looper letters, 59 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2022-12-13 16:31:42,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 285 flow [2022-12-13 16:31:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:31:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:31:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 730 transitions. [2022-12-13 16:31:42,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.494579945799458 [2022-12-13 16:31:42,887 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 730 transitions. [2022-12-13 16:31:42,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 730 transitions. [2022-12-13 16:31:42,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:42,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 730 transitions. [2022-12-13 16:31:42,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.5) internal successors, (730), 4 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,890 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,890 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 109 flow. Second operand 4 states and 730 transitions. [2022-12-13 16:31:42,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 285 flow [2022-12-13 16:31:42,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 63 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:31:42,891 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 122 flow [2022-12-13 16:31:42,891 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-13 16:31:42,892 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2022-12-13 16:31:42,892 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 122 flow [2022-12-13 16:31:42,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:42,892 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:42,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:31:42,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:42,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1200626825, now seen corresponding path program 1 times [2022-12-13 16:31:42,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:42,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413336850] [2022-12-13 16:31:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:42,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:42,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:42,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413336850] [2022-12-13 16:31:42,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413336850] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:42,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:42,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:31:42,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447562285] [2022-12-13 16:31:42,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:42,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:31:42,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:42,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:31:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:31:42,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 369 [2022-12-13 16:31:42,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:42,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:42,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 369 [2022-12-13 16:31:42,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:43,122 INFO L130 PetriNetUnfolder]: 849/1418 cut-off events. [2022-12-13 16:31:43,122 INFO L131 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2022-12-13 16:31:43,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 1418 events. 849/1418 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6565 event pairs, 401 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 3100. Up to 1291 conditions per place. [2022-12-13 16:31:43,129 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2022-12-13 16:31:43,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 283 flow [2022-12-13 16:31:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2022-12-13 16:31:43,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5140018066847335 [2022-12-13 16:31:43,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2022-12-13 16:31:43,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2022-12-13 16:31:43,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:43,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2022-12-13 16:31:43,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:43,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:43,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:43,135 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 122 flow. Second operand 3 states and 569 transitions. [2022-12-13 16:31:43,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 283 flow [2022-12-13 16:31:43,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:31:43,137 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 136 flow [2022-12-13 16:31:43,138 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-12-13 16:31:43,138 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2022-12-13 16:31:43,138 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 136 flow [2022-12-13 16:31:43,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:43,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:43,139 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:43,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:31:43,139 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash 510037308, now seen corresponding path program 1 times [2022-12-13 16:31:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:43,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512025092] [2022-12-13 16:31:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:43,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:43,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512025092] [2022-12-13 16:31:43,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512025092] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:43,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:43,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:31:43,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453236307] [2022-12-13 16:31:43,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:43,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:31:43,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:43,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:31:43,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:31:43,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 369 [2022-12-13 16:31:43,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:43,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:43,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 369 [2022-12-13 16:31:43,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:43,360 INFO L130 PetriNetUnfolder]: 887/1468 cut-off events. [2022-12-13 16:31:43,360 INFO L131 PetriNetUnfolder]: For 312/312 co-relation queries the response was YES. [2022-12-13 16:31:43,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 1468 events. 887/1468 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6800 event pairs, 337 based on Foata normal form. 10/1270 useless extension candidates. Maximal degree in co-relation 3474. Up to 1241 conditions per place. [2022-12-13 16:31:43,364 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 61 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2022-12-13 16:31:43,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 312 flow [2022-12-13 16:31:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2022-12-13 16:31:43,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5194218608852755 [2022-12-13 16:31:43,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2022-12-13 16:31:43,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2022-12-13 16:31:43,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:43,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2022-12-13 16:31:43,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:43,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:43,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:43,368 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 136 flow. Second operand 3 states and 575 transitions. [2022-12-13 16:31:43,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 312 flow [2022-12-13 16:31:43,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 305 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:31:43,370 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 140 flow [2022-12-13 16:31:43,371 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-12-13 16:31:43,371 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2022-12-13 16:31:43,371 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 140 flow [2022-12-13 16:31:43,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:43,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:43,371 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 16:31:43,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash 615212933, now seen corresponding path program 1 times [2022-12-13 16:31:43,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:43,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549864825] [2022-12-13 16:31:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:43,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:43,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:43,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549864825] [2022-12-13 16:31:43,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549864825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:43,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494000100] [2022-12-13 16:31:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:43,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:43,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:43,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:43,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:31:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 16:31:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:43,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:31:43,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:31:43,790 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:31:43,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-12-13 16:31:43,812 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 16:31:43,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 16:31:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:43,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:44,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494000100] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:44,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:44,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-12-13 16:31:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022709019] [2022-12-13 16:31:44,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:44,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:31:44,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:31:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:31:44,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 369 [2022-12-13 16:31:44,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 140 flow. Second operand has 16 states, 16 states have (on average 160.4375) internal successors, (2567), 16 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:44,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:44,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 369 [2022-12-13 16:31:44,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:45,756 INFO L130 PetriNetUnfolder]: 2207/3644 cut-off events. [2022-12-13 16:31:45,757 INFO L131 PetriNetUnfolder]: For 1115/1115 co-relation queries the response was YES. [2022-12-13 16:31:45,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8796 conditions, 3644 events. 2207/3644 cut-off events. For 1115/1115 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18534 event pairs, 331 based on Foata normal form. 114/3300 useless extension candidates. Maximal degree in co-relation 8787. Up to 1494 conditions per place. [2022-12-13 16:31:45,768 INFO L137 encePairwiseOnDemand]: 360/369 looper letters, 174 selfloop transitions, 17 changer transitions 0/191 dead transitions. [2022-12-13 16:31:45,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 191 transitions, 906 flow [2022-12-13 16:31:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:31:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 16:31:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1932 transitions. [2022-12-13 16:31:45,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4759793052475979 [2022-12-13 16:31:45,771 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1932 transitions. [2022-12-13 16:31:45,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1932 transitions. [2022-12-13 16:31:45,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:45,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1932 transitions. [2022-12-13 16:31:45,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 175.63636363636363) internal successors, (1932), 11 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:45,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 369.0) internal successors, (4428), 12 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:45,779 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 369.0) internal successors, (4428), 12 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:45,779 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 140 flow. Second operand 11 states and 1932 transitions. [2022-12-13 16:31:45,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 191 transitions, 906 flow [2022-12-13 16:31:45,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 191 transitions, 903 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:31:45,783 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 284 flow [2022-12-13 16:31:45,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=284, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2022-12-13 16:31:45,783 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 14 predicate places. [2022-12-13 16:31:45,783 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 284 flow [2022-12-13 16:31:45,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 160.4375) internal successors, (2567), 16 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:45,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:45,784 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:45,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:31:45,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:45,986 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:45,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:45,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1342037032, now seen corresponding path program 1 times [2022-12-13 16:31:45,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:45,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368129227] [2022-12-13 16:31:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:45,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:46,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:46,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368129227] [2022-12-13 16:31:46,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368129227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:46,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:46,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:31:46,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124081780] [2022-12-13 16:31:46,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:46,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:31:46,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:46,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:31:46,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:31:46,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 369 [2022-12-13 16:31:46,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:46,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:46,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 369 [2022-12-13 16:31:46,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:46,289 INFO L130 PetriNetUnfolder]: 623/1184 cut-off events. [2022-12-13 16:31:46,289 INFO L131 PetriNetUnfolder]: For 1027/1027 co-relation queries the response was YES. [2022-12-13 16:31:46,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3169 conditions, 1184 events. 623/1184 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5371 event pairs, 97 based on Foata normal form. 58/1162 useless extension candidates. Maximal degree in co-relation 3154. Up to 888 conditions per place. [2022-12-13 16:31:46,293 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 49 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2022-12-13 16:31:46,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 377 flow [2022-12-13 16:31:46,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-12-13 16:31:46,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5004516711833785 [2022-12-13 16:31:46,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-12-13 16:31:46,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-12-13 16:31:46,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:46,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-12-13 16:31:46,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:46,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:46,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:46,300 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 284 flow. Second operand 3 states and 554 transitions. [2022-12-13 16:31:46,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 377 flow [2022-12-13 16:31:46,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 355 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-12-13 16:31:46,305 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 233 flow [2022-12-13 16:31:46,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=233, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2022-12-13 16:31:46,306 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2022-12-13 16:31:46,306 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 233 flow [2022-12-13 16:31:46,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:46,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:46,306 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:46,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 16:31:46,307 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:46,307 INFO L85 PathProgramCache]: Analyzing trace with hash 239606206, now seen corresponding path program 1 times [2022-12-13 16:31:46,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:46,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630304880] [2022-12-13 16:31:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:46,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:46,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:46,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630304880] [2022-12-13 16:31:46,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630304880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:46,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:46,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 16:31:46,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496153058] [2022-12-13 16:31:46,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:46,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:31:46,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:46,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:31:46,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:31:47,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 369 [2022-12-13 16:31:47,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 233 flow. Second operand has 12 states, 12 states have (on average 151.58333333333334) internal successors, (1819), 12 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:47,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:47,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 369 [2022-12-13 16:31:47,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:47,723 INFO L130 PetriNetUnfolder]: 807/1506 cut-off events. [2022-12-13 16:31:47,723 INFO L131 PetriNetUnfolder]: For 642/642 co-relation queries the response was YES. [2022-12-13 16:31:47,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4053 conditions, 1506 events. 807/1506 cut-off events. For 642/642 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6766 event pairs, 165 based on Foata normal form. 12/1500 useless extension candidates. Maximal degree in co-relation 4039. Up to 892 conditions per place. [2022-12-13 16:31:47,731 INFO L137 encePairwiseOnDemand]: 355/369 looper letters, 133 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2022-12-13 16:31:47,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 149 transitions, 837 flow [2022-12-13 16:31:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:31:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:31:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1947 transitions. [2022-12-13 16:31:47,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43970189701897017 [2022-12-13 16:31:47,741 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1947 transitions. [2022-12-13 16:31:47,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1947 transitions. [2022-12-13 16:31:47,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:47,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1947 transitions. [2022-12-13 16:31:47,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.25) internal successors, (1947), 12 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:47,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 369.0) internal successors, (4797), 13 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:47,748 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 369.0) internal successors, (4797), 13 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:47,748 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 233 flow. Second operand 12 states and 1947 transitions. [2022-12-13 16:31:47,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 149 transitions, 837 flow [2022-12-13 16:31:47,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 149 transitions, 818 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:31:47,751 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 337 flow [2022-12-13 16:31:47,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=337, PETRI_PLACES=74, PETRI_TRANSITIONS=60} [2022-12-13 16:31:47,752 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 26 predicate places. [2022-12-13 16:31:47,752 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 337 flow [2022-12-13 16:31:47,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.58333333333334) internal successors, (1819), 12 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:47,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:47,753 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:47,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 16:31:47,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:47,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1049740759, now seen corresponding path program 1 times [2022-12-13 16:31:47,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:47,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515276249] [2022-12-13 16:31:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:47,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:47,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515276249] [2022-12-13 16:31:47,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515276249] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:47,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:47,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:31:47,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892266129] [2022-12-13 16:31:47,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:47,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:31:47,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:47,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:31:47,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:31:47,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 369 [2022-12-13 16:31:47,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 167.16666666666666) internal successors, (1003), 6 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:47,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:47,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 369 [2022-12-13 16:31:47,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:48,224 INFO L130 PetriNetUnfolder]: 842/1592 cut-off events. [2022-12-13 16:31:48,224 INFO L131 PetriNetUnfolder]: For 1051/1051 co-relation queries the response was YES. [2022-12-13 16:31:48,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4619 conditions, 1592 events. 842/1592 cut-off events. For 1051/1051 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7391 event pairs, 105 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 4598. Up to 789 conditions per place. [2022-12-13 16:31:48,230 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 83 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2022-12-13 16:31:48,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 656 flow [2022-12-13 16:31:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:31:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:31:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1218 transitions. [2022-12-13 16:31:48,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2022-12-13 16:31:48,233 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1218 transitions. [2022-12-13 16:31:48,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1218 transitions. [2022-12-13 16:31:48,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:48,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1218 transitions. [2022-12-13 16:31:48,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 369.0) internal successors, (2952), 8 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,237 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 369.0) internal successors, (2952), 8 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,237 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 337 flow. Second operand 7 states and 1218 transitions. [2022-12-13 16:31:48,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 656 flow [2022-12-13 16:31:48,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 93 transitions, 638 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 16:31:48,242 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 372 flow [2022-12-13 16:31:48,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2022-12-13 16:31:48,242 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 30 predicate places. [2022-12-13 16:31:48,242 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 372 flow [2022-12-13 16:31:48,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 167.16666666666666) internal successors, (1003), 6 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,243 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:48,243 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:48,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 16:31:48,243 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash -956474965, now seen corresponding path program 1 times [2022-12-13 16:31:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:48,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517930692] [2022-12-13 16:31:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:48,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:31:48,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:48,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517930692] [2022-12-13 16:31:48,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517930692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:48,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:48,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:31:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650666532] [2022-12-13 16:31:48,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:48,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:31:48,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:31:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:31:48,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 369 [2022-12-13 16:31:48,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 372 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:48,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 369 [2022-12-13 16:31:48,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:48,522 INFO L130 PetriNetUnfolder]: 1082/2060 cut-off events. [2022-12-13 16:31:48,522 INFO L131 PetriNetUnfolder]: For 1807/1811 co-relation queries the response was YES. [2022-12-13 16:31:48,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6151 conditions, 2060 events. 1082/2060 cut-off events. For 1807/1811 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 10678 event pairs, 657 based on Foata normal form. 78/2062 useless extension candidates. Maximal degree in co-relation 6127. Up to 1519 conditions per place. [2022-12-13 16:31:48,529 INFO L137 encePairwiseOnDemand]: 365/369 looper letters, 102 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2022-12-13 16:31:48,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 834 flow [2022-12-13 16:31:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 576 transitions. [2022-12-13 16:31:48,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2022-12-13 16:31:48,531 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 576 transitions. [2022-12-13 16:31:48,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 576 transitions. [2022-12-13 16:31:48,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:48,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 576 transitions. [2022-12-13 16:31:48,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,533 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 372 flow. Second operand 3 states and 576 transitions. [2022-12-13 16:31:48,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 834 flow [2022-12-13 16:31:48,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 826 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 16:31:48,539 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 388 flow [2022-12-13 16:31:48,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2022-12-13 16:31:48,539 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 31 predicate places. [2022-12-13 16:31:48,539 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 388 flow [2022-12-13 16:31:48,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:48,539 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 16:31:48,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 16:31:48,539 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:48,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1690189744, now seen corresponding path program 1 times [2022-12-13 16:31:48,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:48,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423124516] [2022-12-13 16:31:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:48,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:48,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423124516] [2022-12-13 16:31:48,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423124516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:48,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155089755] [2022-12-13 16:31:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:48,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:48,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:48,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:48,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:31:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:48,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:31:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:48,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:48,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155089755] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:48,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:48,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-13 16:31:48,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161483339] [2022-12-13 16:31:48,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:48,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 16:31:48,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:48,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 16:31:48,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:31:48,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 369 [2022-12-13 16:31:48,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 388 flow. Second operand has 14 states, 14 states have (on average 167.42857142857142) internal successors, (2344), 14 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:48,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:48,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 369 [2022-12-13 16:31:48,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:49,456 INFO L130 PetriNetUnfolder]: 2081/3874 cut-off events. [2022-12-13 16:31:49,456 INFO L131 PetriNetUnfolder]: For 4389/4389 co-relation queries the response was YES. [2022-12-13 16:31:49,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12429 conditions, 3874 events. 2081/3874 cut-off events. For 4389/4389 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20138 event pairs, 513 based on Foata normal form. 94/3950 useless extension candidates. Maximal degree in co-relation 12404. Up to 989 conditions per place. [2022-12-13 16:31:49,470 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 204 selfloop transitions, 41 changer transitions 0/245 dead transitions. [2022-12-13 16:31:49,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 245 transitions, 1761 flow [2022-12-13 16:31:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:31:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 16:31:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2334 transitions. [2022-12-13 16:31:49,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48655409631019386 [2022-12-13 16:31:49,473 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2334 transitions. [2022-12-13 16:31:49,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2334 transitions. [2022-12-13 16:31:49,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:49,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2334 transitions. [2022-12-13 16:31:49,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 179.53846153846155) internal successors, (2334), 13 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:49,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 369.0) internal successors, (5166), 14 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:49,480 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 369.0) internal successors, (5166), 14 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:49,481 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 388 flow. Second operand 13 states and 2334 transitions. [2022-12-13 16:31:49,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 245 transitions, 1761 flow [2022-12-13 16:31:49,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 245 transitions, 1747 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:31:49,493 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 773 flow [2022-12-13 16:31:49,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=773, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2022-12-13 16:31:49,493 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 48 predicate places. [2022-12-13 16:31:49,493 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 773 flow [2022-12-13 16:31:49,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 167.42857142857142) internal successors, (2344), 14 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:49,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:49,494 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:49,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:31:49,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 16:31:49,695 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:49,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1504119449, now seen corresponding path program 1 times [2022-12-13 16:31:49,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:49,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067620433] [2022-12-13 16:31:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:49,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:50,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:50,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067620433] [2022-12-13 16:31:50,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067620433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:50,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:50,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 16:31:50,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17731659] [2022-12-13 16:31:50,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:50,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 16:31:50,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:50,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 16:31:50,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:31:50,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 369 [2022-12-13 16:31:50,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 773 flow. Second operand has 11 states, 11 states have (on average 155.9090909090909) internal successors, (1715), 11 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:50,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:50,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 369 [2022-12-13 16:31:50,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:51,353 INFO L130 PetriNetUnfolder]: 2419/4594 cut-off events. [2022-12-13 16:31:51,353 INFO L131 PetriNetUnfolder]: For 7126/7126 co-relation queries the response was YES. [2022-12-13 16:31:51,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15548 conditions, 4594 events. 2419/4594 cut-off events. For 7126/7126 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 25967 event pairs, 779 based on Foata normal form. 18/4582 useless extension candidates. Maximal degree in co-relation 15517. Up to 3405 conditions per place. [2022-12-13 16:31:51,370 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 158 selfloop transitions, 12 changer transitions 0/177 dead transitions. [2022-12-13 16:31:51,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 177 transitions, 1480 flow [2022-12-13 16:31:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:31:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 16:31:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1499 transitions. [2022-12-13 16:31:51,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4513700692562481 [2022-12-13 16:31:51,373 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1499 transitions. [2022-12-13 16:31:51,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1499 transitions. [2022-12-13 16:31:51,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:51,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1499 transitions. [2022-12-13 16:31:51,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.55555555555554) internal successors, (1499), 9 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:51,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 369.0) internal successors, (3690), 10 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:51,378 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 369.0) internal successors, (3690), 10 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:51,378 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 773 flow. Second operand 9 states and 1499 transitions. [2022-12-13 16:31:51,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 177 transitions, 1480 flow [2022-12-13 16:31:51,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 177 transitions, 1402 flow, removed 31 selfloop flow, removed 1 redundant places. [2022-12-13 16:31:51,415 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 798 flow [2022-12-13 16:31:51,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=798, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2022-12-13 16:31:51,416 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 60 predicate places. [2022-12-13 16:31:51,416 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 798 flow [2022-12-13 16:31:51,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 155.9090909090909) internal successors, (1715), 11 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:51,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:51,416 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:51,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 16:31:51,416 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash -267870681, now seen corresponding path program 2 times [2022-12-13 16:31:51,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:51,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611450359] [2022-12-13 16:31:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:52,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:52,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611450359] [2022-12-13 16:31:52,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611450359] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:52,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:52,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 16:31:52,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431903711] [2022-12-13 16:31:52,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:52,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:31:52,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:31:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:31:53,615 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 369 [2022-12-13 16:31:53,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 798 flow. Second operand has 16 states, 16 states have (on average 139.3125) internal successors, (2229), 16 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:53,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:53,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 369 [2022-12-13 16:31:53,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:55,062 INFO L130 PetriNetUnfolder]: 2511/4688 cut-off events. [2022-12-13 16:31:55,062 INFO L131 PetriNetUnfolder]: For 6751/6751 co-relation queries the response was YES. [2022-12-13 16:31:55,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16172 conditions, 4688 events. 2511/4688 cut-off events. For 6751/6751 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 26006 event pairs, 688 based on Foata normal form. 6/4668 useless extension candidates. Maximal degree in co-relation 16135. Up to 3516 conditions per place. [2022-12-13 16:31:55,082 INFO L137 encePairwiseOnDemand]: 353/369 looper letters, 169 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2022-12-13 16:31:55,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 194 transitions, 1546 flow [2022-12-13 16:31:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 16:31:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 16:31:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2204 transitions. [2022-12-13 16:31:55,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.398193315266486 [2022-12-13 16:31:55,088 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2204 transitions. [2022-12-13 16:31:55,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2204 transitions. [2022-12-13 16:31:55,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:55,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2204 transitions. [2022-12-13 16:31:55,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 146.93333333333334) internal successors, (2204), 15 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:55,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 369.0) internal successors, (5904), 16 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:55,099 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 369.0) internal successors, (5904), 16 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:55,099 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 798 flow. Second operand 15 states and 2204 transitions. [2022-12-13 16:31:55,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 194 transitions, 1546 flow [2022-12-13 16:31:55,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 194 transitions, 1528 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 16:31:55,125 INFO L231 Difference]: Finished difference. Result has 123 places, 114 transitions, 922 flow [2022-12-13 16:31:55,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=922, PETRI_PLACES=123, PETRI_TRANSITIONS=114} [2022-12-13 16:31:55,126 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 75 predicate places. [2022-12-13 16:31:55,126 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 922 flow [2022-12-13 16:31:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 139.3125) internal successors, (2229), 16 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:55,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:55,126 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:55,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 16:31:55,127 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1421330123, now seen corresponding path program 1 times [2022-12-13 16:31:55,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:55,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750082212] [2022-12-13 16:31:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:55,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:31:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750082212] [2022-12-13 16:31:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750082212] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053546738] [2022-12-13 16:31:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:55,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:55,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:55,199 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:55,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:31:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:31:55,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:31:55,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:31:55,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053546738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:55,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:55,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 16:31:55,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656605051] [2022-12-13 16:31:55,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:55,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:31:55,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:55,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:31:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:31:55,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 369 [2022-12-13 16:31:55,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 922 flow. Second operand has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:55,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:55,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 369 [2022-12-13 16:31:55,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:56,546 INFO L130 PetriNetUnfolder]: 4352/8659 cut-off events. [2022-12-13 16:31:56,547 INFO L131 PetriNetUnfolder]: For 15249/15249 co-relation queries the response was YES. [2022-12-13 16:31:56,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30475 conditions, 8659 events. 4352/8659 cut-off events. For 15249/15249 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 59070 event pairs, 1588 based on Foata normal form. 1294/9907 useless extension candidates. Maximal degree in co-relation 30434. Up to 2385 conditions per place. [2022-12-13 16:31:56,588 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 369 selfloop transitions, 18 changer transitions 0/394 dead transitions. [2022-12-13 16:31:56,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 394 transitions, 3982 flow [2022-12-13 16:31:56,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:31:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:31:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1155 transitions. [2022-12-13 16:31:56,591 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.521680216802168 [2022-12-13 16:31:56,591 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1155 transitions. [2022-12-13 16:31:56,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1155 transitions. [2022-12-13 16:31:56,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:56,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1155 transitions. [2022-12-13 16:31:56,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.5) internal successors, (1155), 6 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:56,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:56,595 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:56,595 INFO L175 Difference]: Start difference. First operand has 123 places, 114 transitions, 922 flow. Second operand 6 states and 1155 transitions. [2022-12-13 16:31:56,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 394 transitions, 3982 flow [2022-12-13 16:31:56,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 394 transitions, 3884 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 16:31:56,636 INFO L231 Difference]: Finished difference. Result has 123 places, 123 transitions, 1047 flow [2022-12-13 16:31:56,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1047, PETRI_PLACES=123, PETRI_TRANSITIONS=123} [2022-12-13 16:31:56,637 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 75 predicate places. [2022-12-13 16:31:56,637 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 123 transitions, 1047 flow [2022-12-13 16:31:56,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:56,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:56,637 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:56,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:31:56,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:56,838 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:56,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1782886589, now seen corresponding path program 1 times [2022-12-13 16:31:56,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:56,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629976690] [2022-12-13 16:31:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:56,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 16:31:56,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:56,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629976690] [2022-12-13 16:31:56,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629976690] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:31:56,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:31:56,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:31:56,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158669357] [2022-12-13 16:31:56,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:31:56,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:31:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:31:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:31:56,917 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 369 [2022-12-13 16:31:56,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 123 transitions, 1047 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:56,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:56,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 369 [2022-12-13 16:31:56,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:58,127 INFO L130 PetriNetUnfolder]: 4238/8342 cut-off events. [2022-12-13 16:31:58,128 INFO L131 PetriNetUnfolder]: For 20639/20639 co-relation queries the response was YES. [2022-12-13 16:31:58,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31864 conditions, 8342 events. 4238/8342 cut-off events. For 20639/20639 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 54854 event pairs, 2436 based on Foata normal form. 264/8560 useless extension candidates. Maximal degree in co-relation 31819. Up to 5869 conditions per place. [2022-12-13 16:31:58,161 INFO L137 encePairwiseOnDemand]: 363/369 looper letters, 120 selfloop transitions, 16 changer transitions 0/136 dead transitions. [2022-12-13 16:31:58,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 136 transitions, 1355 flow [2022-12-13 16:31:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:31:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:31:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-12-13 16:31:58,162 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5076784101174345 [2022-12-13 16:31:58,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-12-13 16:31:58,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-12-13 16:31:58,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:58,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-12-13 16:31:58,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 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) [2022-12-13 16:31:58,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:58,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:58,164 INFO L175 Difference]: Start difference. First operand has 123 places, 123 transitions, 1047 flow. Second operand 3 states and 562 transitions. [2022-12-13 16:31:58,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 136 transitions, 1355 flow [2022-12-13 16:31:58,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 136 transitions, 1319 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-12-13 16:31:58,200 INFO L231 Difference]: Finished difference. Result has 124 places, 114 transitions, 1004 flow [2022-12-13 16:31:58,200 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1004, PETRI_PLACES=124, PETRI_TRANSITIONS=114} [2022-12-13 16:31:58,201 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 76 predicate places. [2022-12-13 16:31:58,201 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 114 transitions, 1004 flow [2022-12-13 16:31:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:58,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:58,201 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:58,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 16:31:58,201 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:31:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1478446632, now seen corresponding path program 1 times [2022-12-13 16:31:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:58,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220243781] [2022-12-13 16:31:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:58,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220243781] [2022-12-13 16:31:58,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220243781] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045380780] [2022-12-13 16:31:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:58,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:58,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:58,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:58,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:31:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:58,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 16:31:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:58,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:58,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:31:58,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2022-12-13 16:31:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:59,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045380780] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:59,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:59,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 26 [2022-12-13 16:31:59,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92186557] [2022-12-13 16:31:59,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:59,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:31:59,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:59,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:31:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-12-13 16:32:00,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 369 [2022-12-13 16:32:00,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 114 transitions, 1004 flow. Second operand has 28 states, 28 states have (on average 149.57142857142858) internal successors, (4188), 28 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:00,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:00,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 369 [2022-12-13 16:32:00,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:32:04,040 INFO L130 PetriNetUnfolder]: 4976/9757 cut-off events. [2022-12-13 16:32:04,040 INFO L131 PetriNetUnfolder]: For 29626/29626 co-relation queries the response was YES. [2022-12-13 16:32:04,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38132 conditions, 9757 events. 4976/9757 cut-off events. For 29626/29626 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 66946 event pairs, 532 based on Foata normal form. 168/9869 useless extension candidates. Maximal degree in co-relation 38086. Up to 1989 conditions per place. [2022-12-13 16:32:04,087 INFO L137 encePairwiseOnDemand]: 354/369 looper letters, 261 selfloop transitions, 109 changer transitions 0/370 dead transitions. [2022-12-13 16:32:04,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 370 transitions, 3263 flow [2022-12-13 16:32:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 16:32:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 16:32:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5556 transitions. [2022-12-13 16:32:04,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4182475158084914 [2022-12-13 16:32:04,091 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5556 transitions. [2022-12-13 16:32:04,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5556 transitions. [2022-12-13 16:32:04,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:32:04,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5556 transitions. [2022-12-13 16:32:04,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 154.33333333333334) internal successors, (5556), 36 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:04,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 369.0) internal successors, (13653), 37 states have internal predecessors, (13653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:04,113 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 369.0) internal successors, (13653), 37 states have internal predecessors, (13653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:04,113 INFO L175 Difference]: Start difference. First operand has 124 places, 114 transitions, 1004 flow. Second operand 36 states and 5556 transitions. [2022-12-13 16:32:04,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 370 transitions, 3263 flow [2022-12-13 16:32:04,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 370 transitions, 3152 flow, removed 29 selfloop flow, removed 3 redundant places. [2022-12-13 16:32:04,170 INFO L231 Difference]: Finished difference. Result has 156 places, 162 transitions, 1561 flow [2022-12-13 16:32:04,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1561, PETRI_PLACES=156, PETRI_TRANSITIONS=162} [2022-12-13 16:32:04,171 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 108 predicate places. [2022-12-13 16:32:04,171 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 162 transitions, 1561 flow [2022-12-13 16:32:04,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 149.57142857142858) internal successors, (4188), 28 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:04,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:04,172 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:04,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:32:04,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:04,373 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:32:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash 187894316, now seen corresponding path program 1 times [2022-12-13 16:32:04,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:04,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700766201] [2022-12-13 16:32:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:04,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:04,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700766201] [2022-12-13 16:32:04,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700766201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022122998] [2022-12-13 16:32:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:04,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:04,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:04,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:04,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:32:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:32:04,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:32:04,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:32:04,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022122998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:04,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:32:04,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-13 16:32:04,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806673852] [2022-12-13 16:32:04,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:04,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:32:04,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:04,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:32:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:32:04,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2022-12-13 16:32:04,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 162 transitions, 1561 flow. Second operand has 6 states, 6 states have (on average 165.83333333333334) internal successors, (995), 6 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:04,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:04,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2022-12-13 16:32:04,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:32:06,126 INFO L130 PetriNetUnfolder]: 4556/8995 cut-off events. [2022-12-13 16:32:06,126 INFO L131 PetriNetUnfolder]: For 27105/27105 co-relation queries the response was YES. [2022-12-13 16:32:06,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36671 conditions, 8995 events. 4556/8995 cut-off events. For 27105/27105 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 60569 event pairs, 1471 based on Foata normal form. 66/9025 useless extension candidates. Maximal degree in co-relation 36625. Up to 4996 conditions per place. [2022-12-13 16:32:06,204 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 194 selfloop transitions, 29 changer transitions 0/223 dead transitions. [2022-12-13 16:32:06,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 223 transitions, 2358 flow [2022-12-13 16:32:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:32:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:32:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1065 transitions. [2022-12-13 16:32:06,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.481029810298103 [2022-12-13 16:32:06,206 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1065 transitions. [2022-12-13 16:32:06,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1065 transitions. [2022-12-13 16:32:06,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:32:06,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1065 transitions. [2022-12-13 16:32:06,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.5) internal successors, (1065), 6 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) [2022-12-13 16:32:06,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:06,209 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:06,209 INFO L175 Difference]: Start difference. First operand has 156 places, 162 transitions, 1561 flow. Second operand 6 states and 1065 transitions. [2022-12-13 16:32:06,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 223 transitions, 2358 flow [2022-12-13 16:32:06,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 223 transitions, 2016 flow, removed 122 selfloop flow, removed 12 redundant places. [2022-12-13 16:32:06,280 INFO L231 Difference]: Finished difference. Result has 152 places, 156 transitions, 1335 flow [2022-12-13 16:32:06,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1335, PETRI_PLACES=152, PETRI_TRANSITIONS=156} [2022-12-13 16:32:06,280 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 104 predicate places. [2022-12-13 16:32:06,280 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 156 transitions, 1335 flow [2022-12-13 16:32:06,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.83333333333334) internal successors, (995), 6 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:06,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:06,280 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-13 16:32:06,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:32:06,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 16:32:06,482 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:32:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:06,483 INFO L85 PathProgramCache]: Analyzing trace with hash -403471387, now seen corresponding path program 2 times [2022-12-13 16:32:06,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:06,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571481927] [2022-12-13 16:32:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:07,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:07,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571481927] [2022-12-13 16:32:07,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571481927] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:07,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953664616] [2022-12-13 16:32:07,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:32:07,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:07,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:07,112 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:07,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:32:07,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:32:07,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:32:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 16:32:07,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:07,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:07,233 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:32:07,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-12-13 16:32:07,252 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 16:32:07,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 16:32:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:07,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:07,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953664616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:07,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:07,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 31 [2022-12-13 16:32:07,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646886612] [2022-12-13 16:32:07,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:07,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 16:32:07,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 16:32:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 16:32:11,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 369 [2022-12-13 16:32:11,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 156 transitions, 1335 flow. Second operand has 33 states, 33 states have (on average 157.45454545454547) internal successors, (5196), 33 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:11,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:11,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 369 [2022-12-13 16:32:11,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:32:14,430 INFO L130 PetriNetUnfolder]: 6664/13151 cut-off events. [2022-12-13 16:32:14,430 INFO L131 PetriNetUnfolder]: For 34643/34643 co-relation queries the response was YES. [2022-12-13 16:32:14,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50839 conditions, 13151 events. 6664/13151 cut-off events. For 34643/34643 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 88872 event pairs, 1996 based on Foata normal form. 204/13227 useless extension candidates. Maximal degree in co-relation 50792. Up to 7320 conditions per place. [2022-12-13 16:32:14,499 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 388 selfloop transitions, 43 changer transitions 0/431 dead transitions. [2022-12-13 16:32:14,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 431 transitions, 3942 flow [2022-12-13 16:32:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 16:32:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 16:32:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3535 transitions. [2022-12-13 16:32:14,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4561878952122855 [2022-12-13 16:32:14,504 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3535 transitions. [2022-12-13 16:32:14,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3535 transitions. [2022-12-13 16:32:14,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:32:14,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3535 transitions. [2022-12-13 16:32:14,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 168.33333333333334) internal successors, (3535), 21 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:14,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 369.0) internal successors, (8118), 22 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:14,514 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 369.0) internal successors, (8118), 22 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:14,514 INFO L175 Difference]: Start difference. First operand has 152 places, 156 transitions, 1335 flow. Second operand 21 states and 3535 transitions. [2022-12-13 16:32:14,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 431 transitions, 3942 flow [2022-12-13 16:32:14,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 431 transitions, 3916 flow, removed 13 selfloop flow, removed 0 redundant places. [2022-12-13 16:32:14,622 INFO L231 Difference]: Finished difference. Result has 183 places, 188 transitions, 1846 flow [2022-12-13 16:32:14,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1846, PETRI_PLACES=183, PETRI_TRANSITIONS=188} [2022-12-13 16:32:14,623 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 135 predicate places. [2022-12-13 16:32:14,623 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 188 transitions, 1846 flow [2022-12-13 16:32:14,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 157.45454545454547) internal successors, (5196), 33 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:14,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:14,623 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:14,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:32:14,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 16:32:14,825 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:32:14,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:14,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1706208780, now seen corresponding path program 3 times [2022-12-13 16:32:14,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:14,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892675979] [2022-12-13 16:32:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:15,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892675979] [2022-12-13 16:32:15,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892675979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:15,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:15,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 16:32:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639550613] [2022-12-13 16:32:15,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:15,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 16:32:15,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:15,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 16:32:15,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-12-13 16:32:16,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 369 [2022-12-13 16:32:16,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 188 transitions, 1846 flow. Second operand has 15 states, 15 states have (on average 147.86666666666667) internal successors, (2218), 15 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:16,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:16,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 369 [2022-12-13 16:32:16,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:32:19,302 INFO L130 PetriNetUnfolder]: 7990/16068 cut-off events. [2022-12-13 16:32:19,302 INFO L131 PetriNetUnfolder]: For 52200/52218 co-relation queries the response was YES. [2022-12-13 16:32:19,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65052 conditions, 16068 events. 7990/16068 cut-off events. For 52200/52218 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 117044 event pairs, 1556 based on Foata normal form. 42/15922 useless extension candidates. Maximal degree in co-relation 64993. Up to 4533 conditions per place. [2022-12-13 16:32:19,397 INFO L137 encePairwiseOnDemand]: 350/369 looper letters, 185 selfloop transitions, 220 changer transitions 0/414 dead transitions. [2022-12-13 16:32:19,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 414 transitions, 4411 flow [2022-12-13 16:32:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 16:32:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 16:32:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4105 transitions. [2022-12-13 16:32:19,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4120244906152765 [2022-12-13 16:32:19,446 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4105 transitions. [2022-12-13 16:32:19,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4105 transitions. [2022-12-13 16:32:19,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:32:19,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4105 transitions. [2022-12-13 16:32:19,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 152.03703703703704) internal successors, (4105), 27 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:19,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 369.0) internal successors, (10332), 28 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:19,464 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 369.0) internal successors, (10332), 28 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:19,464 INFO L175 Difference]: Start difference. First operand has 183 places, 188 transitions, 1846 flow. Second operand 27 states and 4105 transitions. [2022-12-13 16:32:19,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 414 transitions, 4411 flow [2022-12-13 16:32:19,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 414 transitions, 4267 flow, removed 52 selfloop flow, removed 7 redundant places. [2022-12-13 16:32:19,627 INFO L231 Difference]: Finished difference. Result has 209 places, 307 transitions, 3617 flow [2022-12-13 16:32:19,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3617, PETRI_PLACES=209, PETRI_TRANSITIONS=307} [2022-12-13 16:32:19,627 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 161 predicate places. [2022-12-13 16:32:19,627 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 307 transitions, 3617 flow [2022-12-13 16:32:19,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 147.86666666666667) internal successors, (2218), 15 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:19,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:19,628 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:19,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 16:32:19,628 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:32:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash -392130776, now seen corresponding path program 4 times [2022-12-13 16:32:19,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:19,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463320498] [2022-12-13 16:32:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:20,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:20,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463320498] [2022-12-13 16:32:20,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463320498] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:20,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818805942] [2022-12-13 16:32:20,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:32:20,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:20,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:20,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:20,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:32:20,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:32:20,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:32:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-13 16:32:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:20,494 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:32:20,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 16:32:20,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 16:32:20,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-12-13 16:32:21,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-12-13 16:32:23,348 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_div_v_arrayElimCell_14_58 Int) (aux_mod_v_arrayElimCell_14_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_14_58 4294967296))) (and (= |c_t2Thread1of1ForFork1_#t~ret44#1| (mod (+ (* 4294967295 aux_mod_v_arrayElimCell_14_58) 4294967295) 4294967296)) (<= 4294966496 aux_mod_v_arrayElimCell_14_58) (<= (+ aux_mod_v_arrayElimCell_14_58 4294967297 .cse0) 0) (< 0 (+ 8589934593 aux_mod_v_arrayElimCell_14_58 .cse0)) (< aux_mod_v_arrayElimCell_14_58 4294967296)))) is different from true [2022-12-13 16:32:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:23,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:23,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:32:23,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 16:32:23,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:32:23,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-13 16:32:23,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-13 16:32:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:23,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818805942] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:23,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:23,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 46 [2022-12-13 16:32:23,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021538194] [2022-12-13 16:32:23,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:23,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 16:32:23,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 16:32:23,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1988, Unknown=4, NotChecked=90, Total=2256 [2022-12-13 16:32:24,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 369 [2022-12-13 16:32:24,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 307 transitions, 3617 flow. Second operand has 48 states, 48 states have (on average 106.75) internal successors, (5124), 48 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:24,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:24,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 369 [2022-12-13 16:32:24,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:32:39,734 INFO L130 PetriNetUnfolder]: 9271/18324 cut-off events. [2022-12-13 16:32:39,734 INFO L131 PetriNetUnfolder]: For 72805/72805 co-relation queries the response was YES. [2022-12-13 16:32:39,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82935 conditions, 18324 events. 9271/18324 cut-off events. For 72805/72805 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 135261 event pairs, 1637 based on Foata normal form. 81/18214 useless extension candidates. Maximal degree in co-relation 82868. Up to 5903 conditions per place. [2022-12-13 16:32:39,847 INFO L137 encePairwiseOnDemand]: 345/369 looper letters, 322 selfloop transitions, 353 changer transitions 0/675 dead transitions. [2022-12-13 16:32:39,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 675 transitions, 7279 flow [2022-12-13 16:32:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 16:32:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-13 16:32:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 7526 transitions. [2022-12-13 16:32:39,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2999362346564642 [2022-12-13 16:32:39,854 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 7526 transitions. [2022-12-13 16:32:39,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 7526 transitions. [2022-12-13 16:32:39,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:32:39,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 7526 transitions. [2022-12-13 16:32:39,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 110.67647058823529) internal successors, (7526), 68 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:39,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 369.0) internal successors, (25461), 69 states have internal predecessors, (25461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:39,875 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 369.0) internal successors, (25461), 69 states have internal predecessors, (25461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:39,875 INFO L175 Difference]: Start difference. First operand has 209 places, 307 transitions, 3617 flow. Second operand 68 states and 7526 transitions. [2022-12-13 16:32:39,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 675 transitions, 7279 flow [2022-12-13 16:32:40,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 675 transitions, 7154 flow, removed 32 selfloop flow, removed 5 redundant places. [2022-12-13 16:32:40,280 INFO L231 Difference]: Finished difference. Result has 278 places, 411 transitions, 5317 flow [2022-12-13 16:32:40,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=5317, PETRI_PLACES=278, PETRI_TRANSITIONS=411} [2022-12-13 16:32:40,281 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 230 predicate places. [2022-12-13 16:32:40,281 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 411 transitions, 5317 flow [2022-12-13 16:32:40,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 106.75) internal successors, (5124), 48 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:40,281 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:40,281 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:40,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 16:32:40,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 16:32:40,483 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:32:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash -713476631, now seen corresponding path program 2 times [2022-12-13 16:32:40,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:40,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045240582] [2022-12-13 16:32:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:40,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:41,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:41,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045240582] [2022-12-13 16:32:41,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045240582] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:41,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361609050] [2022-12-13 16:32:41,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:32:41,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:41,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:41,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:41,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:32:41,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:32:41,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:32:41,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 16:32:41,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:41,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:41,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:41,126 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:32:41,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-12-13 16:32:41,145 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 16:32:41,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 16:32:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 16:32:41,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:41,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361609050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:41,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:41,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 9] total 29 [2022-12-13 16:32:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154193489] [2022-12-13 16:32:41,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 16:32:41,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 16:32:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-12-13 16:32:43,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 369 [2022-12-13 16:32:43,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 411 transitions, 5317 flow. Second operand has 31 states, 31 states have (on average 149.7741935483871) internal successors, (4643), 31 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:43,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:43,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 369 [2022-12-13 16:32:43,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:32:49,782 INFO L130 PetriNetUnfolder]: 10938/21611 cut-off events. [2022-12-13 16:32:49,782 INFO L131 PetriNetUnfolder]: For 107365/107365 co-relation queries the response was YES. [2022-12-13 16:32:49,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112419 conditions, 21611 events. 10938/21611 cut-off events. For 107365/107365 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 165625 event pairs, 2791 based on Foata normal form. 40/21454 useless extension candidates. Maximal degree in co-relation 112346. Up to 11838 conditions per place. [2022-12-13 16:32:49,942 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 604 selfloop transitions, 114 changer transitions 0/718 dead transitions. [2022-12-13 16:32:49,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 718 transitions, 9421 flow [2022-12-13 16:32:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:32:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 16:32:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4082 transitions. [2022-12-13 16:32:49,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2022-12-13 16:32:49,947 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4082 transitions. [2022-12-13 16:32:49,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4082 transitions. [2022-12-13 16:32:49,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:32:49,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4082 transitions. [2022-12-13 16:32:49,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:49,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:49,956 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:49,956 INFO L175 Difference]: Start difference. First operand has 278 places, 411 transitions, 5317 flow. Second operand 26 states and 4082 transitions. [2022-12-13 16:32:49,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 718 transitions, 9421 flow [2022-12-13 16:32:50,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 718 transitions, 8854 flow, removed 199 selfloop flow, removed 24 redundant places. [2022-12-13 16:32:50,768 INFO L231 Difference]: Finished difference. Result has 290 places, 460 transitions, 5954 flow [2022-12-13 16:32:50,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5954, PETRI_PLACES=290, PETRI_TRANSITIONS=460} [2022-12-13 16:32:50,769 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 242 predicate places. [2022-12-13 16:32:50,769 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 460 transitions, 5954 flow [2022-12-13 16:32:50,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 149.7741935483871) internal successors, (4643), 31 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:50,769 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:50,769 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:50,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:32:50,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:50,971 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:32:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1253784257, now seen corresponding path program 2 times [2022-12-13 16:32:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:50,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491261885] [2022-12-13 16:32:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:50,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 16:32:51,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:51,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491261885] [2022-12-13 16:32:51,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491261885] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:51,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467399144] [2022-12-13 16:32:51,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:32:51,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:51,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:51,053 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:51,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:32:51,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:32:51,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:32:51,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 16:32:51,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-13 16:32:51,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:32:51,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467399144] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:51,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:32:51,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-12-13 16:32:51,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812468841] [2022-12-13 16:32:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:51,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:32:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:51,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:32:51,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:32:51,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 369 [2022-12-13 16:32:51,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 460 transitions, 5954 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:51,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:51,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 369 [2022-12-13 16:32:51,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:32:55,711 INFO L130 PetriNetUnfolder]: 10332/20770 cut-off events. [2022-12-13 16:32:55,711 INFO L131 PetriNetUnfolder]: For 102421/102473 co-relation queries the response was YES. [2022-12-13 16:32:55,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107259 conditions, 20770 events. 10332/20770 cut-off events. For 102421/102473 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 161503 event pairs, 8453 based on Foata normal form. 67/20602 useless extension candidates. Maximal degree in co-relation 107184. Up to 20370 conditions per place. [2022-12-13 16:32:55,889 INFO L137 encePairwiseOnDemand]: 367/369 looper letters, 433 selfloop transitions, 1 changer transitions 1/451 dead transitions. [2022-12-13 16:32:55,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 451 transitions, 6765 flow [2022-12-13 16:32:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:32:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:32:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2022-12-13 16:32:55,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2022-12-13 16:32:55,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2022-12-13 16:32:55,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2022-12-13 16:32:55,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:32:55,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2022-12-13 16:32:55,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:55,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:55,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:55,894 INFO L175 Difference]: Start difference. First operand has 290 places, 460 transitions, 5954 flow. Second operand 3 states and 525 transitions. [2022-12-13 16:32:55,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 451 transitions, 6765 flow [2022-12-13 16:32:56,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 451 transitions, 6663 flow, removed 28 selfloop flow, removed 8 redundant places. [2022-12-13 16:32:56,616 INFO L231 Difference]: Finished difference. Result has 275 places, 450 transitions, 5792 flow [2022-12-13 16:32:56,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5792, PETRI_PLACES=275, PETRI_TRANSITIONS=450} [2022-12-13 16:32:56,616 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 227 predicate places. [2022-12-13 16:32:56,617 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 450 transitions, 5792 flow [2022-12-13 16:32:56,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:32:56,617 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:56,617 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:56,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 16:32:56,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 16:32:56,818 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:32:56,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:56,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1130817789, now seen corresponding path program 1 times [2022-12-13 16:32:56,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:56,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41909431] [2022-12-13 16:32:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:59,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:59,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41909431] [2022-12-13 16:32:59,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41909431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:59,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548007117] [2022-12-13 16:32:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:59,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:59,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:59,372 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:59,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:32:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:59,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-13 16:32:59,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:59,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 16:33:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:00,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-12-13 16:33:01,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-12-13 16:33:03,754 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_arrayElimCell_23_58 Int) (aux_div_v_arrayElimCell_23_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_23_58 4294967296))) (and (<= (+ aux_mod_v_arrayElimCell_23_58 4294967297 .cse0) 0) (< 0 (+ 8589934593 aux_mod_v_arrayElimCell_23_58 .cse0)) (<= 4294966496 aux_mod_v_arrayElimCell_23_58) (= |c_t2Thread1of1ForFork1_#t~ret44#1| (mod (+ 4294967295 (* 4294967295 aux_mod_v_arrayElimCell_23_58)) 4294967296)) (< aux_mod_v_arrayElimCell_23_58 4294967296)))) is different from true [2022-12-13 16:33:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 16:33:03,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:05,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-12-13 16:33:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:33:06,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548007117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:33:06,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:33:06,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 57 [2022-12-13 16:33:06,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051354656] [2022-12-13 16:33:06,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:06,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-13 16:33:06,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-13 16:33:06,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3020, Unknown=1, NotChecked=110, Total=3306 [2022-12-13 16:33:07,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 369 [2022-12-13 16:33:07,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 450 transitions, 5792 flow. Second operand has 58 states, 58 states have (on average 106.86206896551724) internal successors, (6198), 58 states have internal predecessors, (6198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:07,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:07,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 369 [2022-12-13 16:33:07,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:35:27,879 INFO L130 PetriNetUnfolder]: 20085/39490 cut-off events. [2022-12-13 16:35:27,879 INFO L131 PetriNetUnfolder]: For 190377/190377 co-relation queries the response was YES. [2022-12-13 16:35:28,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203961 conditions, 39490 events. 20085/39490 cut-off events. For 190377/190377 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 335637 event pairs, 3561 based on Foata normal form. 311/39584 useless extension candidates. Maximal degree in co-relation 203885. Up to 15281 conditions per place. [2022-12-13 16:35:28,340 INFO L137 encePairwiseOnDemand]: 345/369 looper letters, 600 selfloop transitions, 778 changer transitions 161/1539 dead transitions. [2022-12-13 16:35:28,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1539 transitions, 18395 flow [2022-12-13 16:35:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-12-13 16:35:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2022-12-13 16:35:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 18214 transitions. [2022-12-13 16:35:28,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29915414305658206 [2022-12-13 16:35:28,357 INFO L72 ComplementDD]: Start complementDD. Operand 165 states and 18214 transitions. [2022-12-13 16:35:28,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 165 states and 18214 transitions. [2022-12-13 16:35:28,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:35:28,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 165 states and 18214 transitions. [2022-12-13 16:35:28,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 166 states, 165 states have (on average 110.38787878787879) internal successors, (18214), 165 states have internal predecessors, (18214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:28,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 166 states, 166 states have (on average 369.0) internal successors, (61254), 166 states have internal predecessors, (61254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:28,409 INFO L81 ComplementDD]: Finished complementDD. Result has 166 states, 166 states have (on average 369.0) internal successors, (61254), 166 states have internal predecessors, (61254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:28,409 INFO L175 Difference]: Start difference. First operand has 275 places, 450 transitions, 5792 flow. Second operand 165 states and 18214 transitions. [2022-12-13 16:35:28,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1539 transitions, 18395 flow [2022-12-13 16:35:30,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1539 transitions, 18392 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:35:30,131 INFO L231 Difference]: Finished difference. Result has 467 places, 883 transitions, 13505 flow [2022-12-13 16:35:30,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5789, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=165, PETRI_FLOW=13505, PETRI_PLACES=467, PETRI_TRANSITIONS=883} [2022-12-13 16:35:30,131 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 419 predicate places. [2022-12-13 16:35:30,131 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 883 transitions, 13505 flow [2022-12-13 16:35:30,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 106.86206896551724) internal successors, (6198), 58 states have internal predecessors, (6198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:30,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:35:30,132 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:35:30,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 16:35:30,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 16:35:30,334 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:35:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:35:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1418323013, now seen corresponding path program 2 times [2022-12-13 16:35:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:35:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153678096] [2022-12-13 16:35:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:35:30,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:35:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:35:31,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:35:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153678096] [2022-12-13 16:35:31,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153678096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:35:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806881213] [2022-12-13 16:35:31,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:35:31,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:35:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:35:31,748 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:35:31,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:35:31,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:35:31,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:35:31,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 16:35:31,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:35:31,869 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 16:35:31,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 16:35:32,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 16:35:32,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-12-13 16:35:32,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:32,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-12-13 16:35:33,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-12-13 16:35:35,605 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_div_v_arrayElimCell_30_58 Int) (aux_mod_v_arrayElimCell_30_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_30_58 4294967296))) (and (= (mod (+ 4294967295 (* 4294967295 aux_mod_v_arrayElimCell_30_58)) 4294967296) |c_t2Thread1of1ForFork1_#t~ret44#1|) (<= 4294966496 aux_mod_v_arrayElimCell_30_58) (<= (+ .cse0 aux_mod_v_arrayElimCell_30_58 4294967297) 0) (< 0 (+ 8589934593 .cse0 aux_mod_v_arrayElimCell_30_58)) (< aux_mod_v_arrayElimCell_30_58 4294967296)))) is different from true [2022-12-13 16:35:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 16:35:35,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:35:36,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:35:36,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 16:35:36,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:35:36,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-13 16:35:36,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-13 16:35:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:35:37,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806881213] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:35:37,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:35:37,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 63 [2022-12-13 16:35:37,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383484454] [2022-12-13 16:35:37,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:35:37,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 16:35:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:35:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 16:35:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3683, Unknown=8, NotChecked=124, Total=4160 [2022-12-13 16:35:37,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 369 [2022-12-13 16:35:37,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 883 transitions, 13505 flow. Second operand has 65 states, 65 states have (on average 106.66153846153846) internal successors, (6933), 65 states have internal predecessors, (6933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:37,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:35:37,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 369 [2022-12-13 16:35:37,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:36:10,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:15,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:36,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:38,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:50,554 INFO L130 PetriNetUnfolder]: 27277/53634 cut-off events. [2022-12-13 16:36:50,555 INFO L131 PetriNetUnfolder]: For 638800/638800 co-relation queries the response was YES. [2022-12-13 16:36:51,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389966 conditions, 53634 events. 27277/53634 cut-off events. For 638800/638800 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 479869 event pairs, 5078 based on Foata normal form. 255/53591 useless extension candidates. Maximal degree in co-relation 389860. Up to 20936 conditions per place. [2022-12-13 16:36:51,355 INFO L137 encePairwiseOnDemand]: 344/369 looper letters, 1092 selfloop transitions, 1001 changer transitions 87/2180 dead transitions. [2022-12-13 16:36:51,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 2180 transitions, 34433 flow [2022-12-13 16:36:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-12-13 16:36:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2022-12-13 16:36:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 15842 transitions. [2022-12-13 16:36:51,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3002255197377149 [2022-12-13 16:36:51,376 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 15842 transitions. [2022-12-13 16:36:51,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 15842 transitions. [2022-12-13 16:36:51,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:36:51,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 15842 transitions. [2022-12-13 16:36:51,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 110.78321678321679) internal successors, (15842), 143 states have internal predecessors, (15842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:36:51,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 369.0) internal successors, (53136), 144 states have internal predecessors, (53136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:36:51,440 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 369.0) internal successors, (53136), 144 states have internal predecessors, (53136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:36:51,440 INFO L175 Difference]: Start difference. First operand has 467 places, 883 transitions, 13505 flow. Second operand 143 states and 15842 transitions. [2022-12-13 16:36:51,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 2180 transitions, 34433 flow [2022-12-13 16:36:56,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 2180 transitions, 32984 flow, removed 420 selfloop flow, removed 23 redundant places. [2022-12-13 16:36:57,002 INFO L231 Difference]: Finished difference. Result has 639 places, 1473 transitions, 24612 flow [2022-12-13 16:36:57,002 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=12258, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=24612, PETRI_PLACES=639, PETRI_TRANSITIONS=1473} [2022-12-13 16:36:57,003 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 591 predicate places. [2022-12-13 16:36:57,003 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 1473 transitions, 24612 flow [2022-12-13 16:36:57,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 106.66153846153846) internal successors, (6933), 65 states have internal predecessors, (6933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:36:57,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:36:57,004 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:36:57,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 16:36:57,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 16:36:57,205 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:36:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:36:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1495122568, now seen corresponding path program 2 times [2022-12-13 16:36:57,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:36:57,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656021075] [2022-12-13 16:36:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:36:57,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:36:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:36:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:36:57,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:36:57,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656021075] [2022-12-13 16:36:57,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656021075] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:36:57,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140009166] [2022-12-13 16:36:57,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:36:57,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:36:57,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:36:57,355 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:36:57,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:36:57,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:36:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:36:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 16:36:57,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:36:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:36:57,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:36:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:36:57,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140009166] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:36:57,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:36:57,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-13 16:36:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401696689] [2022-12-13 16:36:57,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:36:57,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:36:57,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:36:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:36:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:36:57,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2022-12-13 16:36:57,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 1473 transitions, 24612 flow. Second operand has 20 states, 20 states have (on average 164.25) internal successors, (3285), 20 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:36:57,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:36:57,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2022-12-13 16:36:57,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:37:23,699 INFO L130 PetriNetUnfolder]: 28934/57071 cut-off events. [2022-12-13 16:37:23,699 INFO L131 PetriNetUnfolder]: For 910085/910085 co-relation queries the response was YES. [2022-12-13 16:37:24,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467820 conditions, 57071 events. 28934/57071 cut-off events. For 910085/910085 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 513320 event pairs, 8066 based on Foata normal form. 328/57231 useless extension candidates. Maximal degree in co-relation 467664. Up to 22585 conditions per place. [2022-12-13 16:37:24,944 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 1431 selfloop transitions, 682 changer transitions 9/2122 dead transitions. [2022-12-13 16:37:24,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 2122 transitions, 39591 flow [2022-12-13 16:37:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 16:37:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 16:37:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3909 transitions. [2022-12-13 16:37:24,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4605867797808413 [2022-12-13 16:37:24,948 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3909 transitions. [2022-12-13 16:37:24,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3909 transitions. [2022-12-13 16:37:24,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:37:24,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3909 transitions. [2022-12-13 16:37:24,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 169.95652173913044) internal successors, (3909), 23 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:24,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 369.0) internal successors, (8856), 24 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:24,955 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 369.0) internal successors, (8856), 24 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:24,956 INFO L175 Difference]: Start difference. First operand has 639 places, 1473 transitions, 24612 flow. Second operand 23 states and 3909 transitions. [2022-12-13 16:37:24,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 2122 transitions, 39591 flow [2022-12-13 16:37:37,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 2122 transitions, 35792 flow, removed 1312 selfloop flow, removed 29 redundant places. [2022-12-13 16:37:37,783 INFO L231 Difference]: Finished difference. Result has 627 places, 1516 transitions, 24993 flow [2022-12-13 16:37:37,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=20799, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=24993, PETRI_PLACES=627, PETRI_TRANSITIONS=1516} [2022-12-13 16:37:37,784 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 579 predicate places. [2022-12-13 16:37:37,784 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 1516 transitions, 24993 flow [2022-12-13 16:37:37,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 164.25) internal successors, (3285), 20 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:37,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:37,784 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:37,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 16:37:37,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:37,985 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:37:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash -457093826, now seen corresponding path program 3 times [2022-12-13 16:37:37,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:37,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841325243] [2022-12-13 16:37:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:37,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:44,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:44,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841325243] [2022-12-13 16:37:44,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841325243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:44,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479154506] [2022-12-13 16:37:44,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:37:44,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:44,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:44,851 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:44,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:37:45,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:37:45,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:37:45,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-13 16:37:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:45,206 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:37:45,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 16:37:46,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 16:37:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:37:47,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 40 [2022-12-13 16:37:47,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 46 [2022-12-13 16:37:49,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-12-13 16:37:51,294 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_arrayElimCell_38_58 Int) (aux_div_v_arrayElimCell_38_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_38_58 4294967296))) (and (<= (+ .cse0 aux_mod_v_arrayElimCell_38_58 4294967297) 0) (< 0 (+ 8589934593 .cse0 aux_mod_v_arrayElimCell_38_58)) (< aux_mod_v_arrayElimCell_38_58 4294967296) (<= 4294966496 aux_mod_v_arrayElimCell_38_58) (= (mod (+ 4294967295 (* 4294967295 aux_mod_v_arrayElimCell_38_58)) 4294967296) |c_t2Thread1of1ForFork1_#t~ret44#1|)))) is different from true [2022-12-13 16:37:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 16:37:51,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:37:53,609 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1136 (Array Int Int)) (v_ArrVal_1135 Int)) (not (= (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_push_~stack#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_push_~stack#1.base|) (+ |c_t1Thread1of1ForFork0_push_~stack#1.offset| (* |c_t1Thread1of1ForFork0_push_#t~ret34#1| 4)) v_ArrVal_1135)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1136) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-12-13 16:37:57,994 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-13 16:37:57,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2022-12-13 16:37:58,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:37:58,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2022-12-13 16:37:58,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-13 16:38:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 15 refuted. 2 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-13 16:38:02,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479154506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:38:02,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:38:02,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22, 21] total 73 [2022-12-13 16:38:02,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77332627] [2022-12-13 16:38:02,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:38:02,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-13 16:38:02,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:38:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-13 16:38:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=4941, Unknown=46, NotChecked=286, Total=5550 [2022-12-13 16:38:03,005 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 369 [2022-12-13 16:38:03,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 1516 transitions, 24993 flow. Second operand has 75 states, 75 states have (on average 106.72) internal successors, (8004), 75 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:03,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:38:03,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 369 [2022-12-13 16:38:03,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:38:15,570 WARN L233 SmtUtils]: Spent 9.01s on a formula simplification. DAG size of input: 152 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:44:42,319 INFO L130 PetriNetUnfolder]: 34262/67700 cut-off events. [2022-12-13 16:44:42,319 INFO L131 PetriNetUnfolder]: For 547433/547433 co-relation queries the response was YES. [2022-12-13 16:44:43,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443034 conditions, 67700 events. 34262/67700 cut-off events. For 547433/547433 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 622888 event pairs, 4363 based on Foata normal form. 359/67765 useless extension candidates. Maximal degree in co-relation 442889. Up to 26860 conditions per place. [2022-12-13 16:44:43,691 INFO L137 encePairwiseOnDemand]: 344/369 looper letters, 729 selfloop transitions, 1991 changer transitions 108/2828 dead transitions. [2022-12-13 16:44:43,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 2828 transitions, 45436 flow [2022-12-13 16:44:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-12-13 16:44:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2022-12-13 16:44:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 21380 transitions. [2022-12-13 16:44:43,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29866174950409297 [2022-12-13 16:44:43,708 INFO L72 ComplementDD]: Start complementDD. Operand 194 states and 21380 transitions. [2022-12-13 16:44:43,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 194 states and 21380 transitions. [2022-12-13 16:44:43,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:44:43,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 194 states and 21380 transitions. [2022-12-13 16:44:43,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 195 states, 194 states have (on average 110.20618556701031) internal successors, (21380), 194 states have internal predecessors, (21380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:44:43,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 195 states, 195 states have (on average 369.0) internal successors, (71955), 195 states have internal predecessors, (71955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:44:43,767 INFO L81 ComplementDD]: Finished complementDD. Result has 195 states, 195 states have (on average 369.0) internal successors, (71955), 195 states have internal predecessors, (71955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:44:43,767 INFO L175 Difference]: Start difference. First operand has 627 places, 1516 transitions, 24993 flow. Second operand 194 states and 21380 transitions. [2022-12-13 16:44:43,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 2828 transitions, 45436 flow [2022-12-13 16:44:54,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 2828 transitions, 44535 flow, removed 223 selfloop flow, removed 10 redundant places. [2022-12-13 16:44:54,607 INFO L231 Difference]: Finished difference. Result has 828 places, 2114 transitions, 38242 flow [2022-12-13 16:44:54,608 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=24117, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=194, PETRI_FLOW=38242, PETRI_PLACES=828, PETRI_TRANSITIONS=2114} [2022-12-13 16:44:54,608 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 780 predicate places. [2022-12-13 16:44:54,608 INFO L495 AbstractCegarLoop]: Abstraction has has 828 places, 2114 transitions, 38242 flow [2022-12-13 16:44:54,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 106.72) internal successors, (8004), 75 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:44:54,609 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:44:54,609 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:44:54,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 16:44:54,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:44:54,811 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 16:44:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:44:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash -745373559, now seen corresponding path program 3 times [2022-12-13 16:44:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:44:54,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262849037] [2022-12-13 16:44:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:44:54,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:44:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:44:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:44:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:44:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262849037] [2022-12-13 16:44:56,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262849037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:44:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445578334] [2022-12-13 16:44:56,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:44:56,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:44:56,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:44:56,026 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:44:56,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2d1fd7-2898-478c-afc5-f5a5bcebd18d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:44:56,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:44:56,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:44:56,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 16:44:56,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:44:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:44:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:44:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:44:56,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-13 16:44:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:44:56,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:44:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:44:58,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445578334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:44:58,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:44:58,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 34 [2022-12-13 16:44:58,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448128428] [2022-12-13 16:44:58,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:44:58,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 16:44:58,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:44:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 16:44:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 16:45:09,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 369 [2022-12-13 16:45:09,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 828 places, 2114 transitions, 38242 flow. Second operand has 36 states, 36 states have (on average 147.88888888888889) internal successors, (5324), 36 states have internal predecessors, (5324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:45:09,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:45:09,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 369 [2022-12-13 16:45:09,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand