./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 4e7fbc69 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_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS --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-4e7fbc6 [2022-11-23 01:45:11,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 01:45:11,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 01:45:12,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 01:45:12,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 01:45:12,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 01:45:12,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 01:45:12,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 01:45:12,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 01:45:12,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 01:45:12,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 01:45:12,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 01:45:12,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 01:45:12,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 01:45:12,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 01:45:12,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 01:45:12,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 01:45:12,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 01:45:12,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 01:45:12,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 01:45:12,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 01:45:12,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 01:45:12,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 01:45:12,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 01:45:12,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 01:45:12,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 01:45:12,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 01:45:12,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 01:45:12,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 01:45:12,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 01:45:12,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 01:45:12,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 01:45:12,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 01:45:12,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 01:45:12,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 01:45:12,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 01:45:12,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 01:45:12,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 01:45:12,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 01:45:12,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 01:45:12,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 01:45:12,087 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 01:45:12,133 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 01:45:12,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 01:45:12,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 01:45:12,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 01:45:12,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 01:45:12,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 01:45:12,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 01:45:12,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 01:45:12,137 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 01:45:12,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 01:45:12,138 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 01:45:12,139 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 01:45:12,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 01:45:12,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 01:45:12,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 01:45:12,140 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 01:45:12,140 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 01:45:12,140 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 01:45:12,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 01:45:12,140 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 01:45:12,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 01:45:12,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 01:45:12,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 01:45:12,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 01:45:12,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 01:45:12,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:45:12,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 01:45:12,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 01:45:12,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 01:45:12,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 01:45:12,144 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 01:45:12,144 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 01:45:12,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 01:45:12,144 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_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-11-23 01:45:12,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 01:45:12,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 01:45:12,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 01:45:12,415 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 01:45:12,415 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 01:45:12,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-23 01:45:15,366 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 01:45:15,677 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 01:45:15,678 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-23 01:45:15,693 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/data/93d776450/147db00f1da54fc4aa38009646272c7c/FLAGc654a8f6f [2022-11-23 01:45:15,728 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/data/93d776450/147db00f1da54fc4aa38009646272c7c [2022-11-23 01:45:15,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 01:45:15,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 01:45:15,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 01:45:15,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 01:45:15,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 01:45:15,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:45:15" (1/1) ... [2022-11-23 01:45:15,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1095297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:15, skipping insertion in model container [2022-11-23 01:45:15,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:45:15" (1/1) ... [2022-11-23 01:45:15,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 01:45:15,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:45:16,248 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_b3703051-a11d-4198-b1a3-2b67c2543e5d/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-23 01:45:16,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:45:16,306 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 01:45:16,341 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_b3703051-a11d-4198-b1a3-2b67c2543e5d/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-23 01:45:16,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:45:16,405 INFO L208 MainTranslator]: Completed translation [2022-11-23 01:45:16,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16 WrapperNode [2022-11-23 01:45:16,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 01:45:16,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 01:45:16,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 01:45:16,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 01:45:16,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,460 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-11-23 01:45:16,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 01:45:16,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 01:45:16,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 01:45:16,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 01:45:16,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,490 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 01:45:16,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 01:45:16,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 01:45:16,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 01:45:16,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (1/1) ... [2022-11-23 01:45:16,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:45:16,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:45:16,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 01:45:16,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 01:45:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-23 01:45:16,585 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-23 01:45:16,586 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-23 01:45:16,586 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-23 01:45:16,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 01:45:16,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 01:45:16,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 01:45:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 01:45:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-23 01:45:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 01:45:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 01:45:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 01:45:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 01:45:16,589 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 01:45:16,733 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 01:45:16,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 01:45:17,081 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 01:45:17,090 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 01:45:17,090 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 01:45:17,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:45:17 BoogieIcfgContainer [2022-11-23 01:45:17,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 01:45:17,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 01:45:17,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 01:45:17,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 01:45:17,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:45:15" (1/3) ... [2022-11-23 01:45:17,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76618ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:45:17, skipping insertion in model container [2022-11-23 01:45:17,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:16" (2/3) ... [2022-11-23 01:45:17,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76618ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:45:17, skipping insertion in model container [2022-11-23 01:45:17,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:45:17" (3/3) ... [2022-11-23 01:45:17,113 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-11-23 01:45:17,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 01:45:17,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-23 01:45:17,128 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 01:45:17,235 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 01:45:17,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 186 transitions, 388 flow [2022-11-23 01:45:17,360 INFO L130 PetriNetUnfolder]: 10/184 cut-off events. [2022-11-23 01:45:17,360 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 01:45:17,373 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 488 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. [2022-11-23 01:45:17,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 186 transitions, 388 flow [2022-11-23 01:45:17,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 179 transitions, 370 flow [2022-11-23 01:45:17,393 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 01:45:17,408 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 179 transitions, 370 flow [2022-11-23 01:45:17,411 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 179 transitions, 370 flow [2022-11-23 01:45:17,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 179 transitions, 370 flow [2022-11-23 01:45:17,515 INFO L130 PetriNetUnfolder]: 10/179 cut-off events. [2022-11-23 01:45:17,515 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 01:45:17,520 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 479 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. [2022-11-23 01:45:17,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 9804 [2022-11-23 01:45:23,469 INFO L134 LiptonReduction]: Checked pairs total: 14470 [2022-11-23 01:45:23,470 INFO L136 LiptonReduction]: Total number of compositions: 185 [2022-11-23 01:45:23,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:45:23,492 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;@77ffead9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:45:23,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-23 01:45:23,494 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 01:45:23,495 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:45:23,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:23,496 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-23 01:45:23,496 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)] === [2022-11-23 01:45:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash 758, now seen corresponding path program 1 times [2022-11-23 01:45:23,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:23,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167571506] [2022-11-23 01:45:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:23,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:23,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:23,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167571506] [2022-11-23 01:45:23,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167571506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:23,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:23,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-23 01:45:23,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973494166] [2022-11-23 01:45:23,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:23,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 01:45:23,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 01:45:23,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 01:45:23,658 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 371 [2022-11-23 01:45:23,660 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) [2022-11-23 01:45:23,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:23,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 371 [2022-11-23 01:45:23,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:23,973 INFO L130 PetriNetUnfolder]: 1250/1969 cut-off events. [2022-11-23 01:45:23,973 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-23 01:45:23,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1969 events. 1250/1969 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9175 event pairs, 994 based on Foata normal form. 0/1091 useless extension candidates. Maximal degree in co-relation 3680. Up to 1922 conditions per place. [2022-11-23 01:45:23,987 INFO L137 encePairwiseOnDemand]: 369/371 looper letters, 42 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2022-11-23 01:45:23,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 184 flow [2022-11-23 01:45:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 01:45:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 01:45:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 394 transitions. [2022-11-23 01:45:24,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5309973045822103 [2022-11-23 01:45:24,003 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 394 transitions. [2022-11-23 01:45:24,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 394 transitions. [2022-11-23 01:45:24,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:24,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 394 transitions. [2022-11-23 01:45:24,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 197.0) internal successors, (394), 2 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:24,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:24,017 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:24,019 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 394 transitions. [2022-11-23 01:45:24,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 184 flow [2022-11-23 01:45:24,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 01:45:24,025 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2022-11-23 01:45:24,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, 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} [2022-11-23 01:45:24,030 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-23 01:45:24,031 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2022-11-23 01:45:24,031 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) [2022-11-23 01:45:24,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:24,032 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 01:45:24,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 01:45:24,032 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)] === [2022-11-23 01:45:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash 746828, now seen corresponding path program 1 times [2022-11-23 01:45:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:24,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856812510] [2022-11-23 01:45:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:24,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:24,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856812510] [2022-11-23 01:45:24,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856812510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:24,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:24,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:45:24,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008988667] [2022-11-23 01:45:24,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:24,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:45:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:45:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:45:24,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 371 [2022-11-23 01:45:24,329 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) [2022-11-23 01:45:24,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:24,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 371 [2022-11-23 01:45:24,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:24,571 INFO L130 PetriNetUnfolder]: 1223/1917 cut-off events. [2022-11-23 01:45:24,571 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-23 01:45:24,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 1917 events. 1223/1917 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8829 event pairs, 972 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 3799. Up to 1869 conditions per place. [2022-11-23 01:45:24,582 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-11-23 01:45:24,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 168 flow [2022-11-23 01:45:24,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:45:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:45:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2022-11-23 01:45:24,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2022-11-23 01:45:24,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2022-11-23 01:45:24,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2022-11-23 01:45:24,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:24,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2022-11-23 01:45:24,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:24,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:24,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:24,598 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 540 transitions. [2022-11-23 01:45:24,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 168 flow [2022-11-23 01:45:24,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 01:45:24,600 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2022-11-23 01:45:24,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, 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} [2022-11-23 01:45:24,602 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-23 01:45:24,602 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2022-11-23 01:45:24,603 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) [2022-11-23 01:45:24,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:24,603 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 01:45:24,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 01:45:24,604 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)] === [2022-11-23 01:45:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash 746827, now seen corresponding path program 1 times [2022-11-23 01:45:24,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484008951] [2022-11-23 01:45:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:24,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:24,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484008951] [2022-11-23 01:45:24,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484008951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:24,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:24,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:45:24,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018608244] [2022-11-23 01:45:24,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:24,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:45:24,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:24,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:45:24,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:45:24,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 371 [2022-11-23 01:45:24,856 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) [2022-11-23 01:45:24,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:24,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 371 [2022-11-23 01:45:24,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:25,081 INFO L130 PetriNetUnfolder]: 1196/1865 cut-off events. [2022-11-23 01:45:25,082 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-23 01:45:25,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 1865 events. 1196/1865 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8469 event pairs, 950 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 3698. Up to 1818 conditions per place. [2022-11-23 01:45:25,095 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-11-23 01:45:25,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2022-11-23 01:45:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:45:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:45:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2022-11-23 01:45:25,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4941599281221923 [2022-11-23 01:45:25,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2022-11-23 01:45:25,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2022-11-23 01:45:25,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:25,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2022-11-23 01:45:25,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:25,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:25,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:25,104 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 550 transitions. [2022-11-23 01:45:25,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2022-11-23 01:45:25,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:45:25,105 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2022-11-23 01:45:25,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, 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} [2022-11-23 01:45:25,106 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-11-23 01:45:25,106 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2022-11-23 01:45:25,107 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) [2022-11-23 01:45:25,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:25,107 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 01:45:25,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 01:45:25,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:25,108 INFO L85 PathProgramCache]: Analyzing trace with hash 717720131, now seen corresponding path program 1 times [2022-11-23 01:45:25,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:25,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189747855] [2022-11-23 01:45:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:25,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:25,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:25,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189747855] [2022-11-23 01:45:25,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189747855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:25,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:25,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:45:25,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706036021] [2022-11-23 01:45:25,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:25,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:45:25,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:45:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:45:25,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 371 [2022-11-23 01:45:25,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 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) [2022-11-23 01:45:25,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:25,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 371 [2022-11-23 01:45:25,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:25,452 INFO L130 PetriNetUnfolder]: 875/1390 cut-off events. [2022-11-23 01:45:25,453 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-23 01:45:25,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 1390 events. 875/1390 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6050 event pairs, 688 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 2759. Up to 1354 conditions per place. [2022-11-23 01:45:25,460 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-11-23 01:45:25,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2022-11-23 01:45:25,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:45:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:45:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-11-23 01:45:25,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47079964061096136 [2022-11-23 01:45:25,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-11-23 01:45:25,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-11-23 01:45:25,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:25,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-11-23 01:45:25,470 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) [2022-11-23 01:45:25,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:25,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:25,474 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 524 transitions. [2022-11-23 01:45:25,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2022-11-23 01:45:25,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:45:25,477 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2022-11-23 01:45:25,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, 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} [2022-11-23 01:45:25,479 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-11-23 01:45:25,479 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2022-11-23 01:45:25,479 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) [2022-11-23 01:45:25,480 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:25,480 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 01:45:25,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 01:45:25,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:25,482 INFO L85 PathProgramCache]: Analyzing trace with hash 717720132, now seen corresponding path program 1 times [2022-11-23 01:45:25,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:25,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566222103] [2022-11-23 01:45:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:25,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:25,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566222103] [2022-11-23 01:45:25,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566222103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:25,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:25,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:45:25,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084260060] [2022-11-23 01:45:25,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:25,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:45:25,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:25,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:45:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:45:25,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 371 [2022-11-23 01:45:25,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:25,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:25,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 371 [2022-11-23 01:45:25,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:25,843 INFO L130 PetriNetUnfolder]: 554/915 cut-off events. [2022-11-23 01:45:25,844 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-23 01:45:25,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 915 events. 554/915 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3816 event pairs, 426 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1820. Up to 890 conditions per place. [2022-11-23 01:45:25,849 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-11-23 01:45:25,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 156 flow [2022-11-23 01:45:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:45:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:45:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-11-23 01:45:25,851 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48607367475292 [2022-11-23 01:45:25,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-11-23 01:45:25,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-11-23 01:45:25,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:25,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-11-23 01:45:25,854 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) [2022-11-23 01:45:25,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:25,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:25,857 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 541 transitions. [2022-11-23 01:45:25,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 156 flow [2022-11-23 01:45:25,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:45:25,858 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2022-11-23 01:45:25,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, 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} [2022-11-23 01:45:25,859 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2022-11-23 01:45:25,859 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2022-11-23 01:45:25,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:25,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:25,860 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 01:45:25,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 01:45:25,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:25,861 INFO L85 PathProgramCache]: Analyzing trace with hash 773714472, now seen corresponding path program 1 times [2022-11-23 01:45:25,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:25,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539534192] [2022-11-23 01:45:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:25,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:25,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539534192] [2022-11-23 01:45:25,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539534192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:25,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:25,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:45:25,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082752056] [2022-11-23 01:45:25,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:25,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:45:25,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:25,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:45:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:45:26,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 371 [2022-11-23 01:45:26,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 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) [2022-11-23 01:45:26,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:26,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 371 [2022-11-23 01:45:26,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:26,275 INFO L130 PetriNetUnfolder]: 630/1056 cut-off events. [2022-11-23 01:45:26,275 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-23 01:45:26,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 1056 events. 630/1056 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4986 event pairs, 114 based on Foata normal form. 0/776 useless extension candidates. Maximal degree in co-relation 2094. Up to 770 conditions per place. [2022-11-23 01:45:26,280 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 55 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2022-11-23 01:45:26,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 253 flow [2022-11-23 01:45:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 01:45:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 01:45:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 732 transitions. [2022-11-23 01:45:26,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2022-11-23 01:45:26,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 732 transitions. [2022-11-23 01:45:26,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 732 transitions. [2022-11-23 01:45:26,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:26,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 732 transitions. [2022-11-23 01:45:26,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:26,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:26,291 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:26,291 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 4 states and 732 transitions. [2022-11-23 01:45:26,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 253 flow [2022-11-23 01:45:26,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 61 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:45:26,295 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 95 flow [2022-11-23 01:45:26,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-11-23 01:45:26,297 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-11-23 01:45:26,298 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 95 flow [2022-11-23 01:45:26,298 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) [2022-11-23 01:45:26,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:26,298 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 01:45:26,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 01:45:26,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash 773714473, now seen corresponding path program 1 times [2022-11-23 01:45:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:26,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584629107] [2022-11-23 01:45:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:26,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:26,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:26,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584629107] [2022-11-23 01:45:26,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584629107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:26,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:26,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:45:26,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424359936] [2022-11-23 01:45:26,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:26,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:45:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:45:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:45:26,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 371 [2022-11-23 01:45:26,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 95 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) [2022-11-23 01:45:26,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:26,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 371 [2022-11-23 01:45:26,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:26,932 INFO L130 PetriNetUnfolder]: 570/959 cut-off events. [2022-11-23 01:45:26,933 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-23 01:45:26,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1964 conditions, 959 events. 570/959 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3693 event pairs, 195 based on Foata normal form. 16/775 useless extension candidates. Maximal degree in co-relation 1959. Up to 754 conditions per place. [2022-11-23 01:45:26,938 INFO L137 encePairwiseOnDemand]: 365/371 looper letters, 56 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2022-11-23 01:45:26,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 261 flow [2022-11-23 01:45:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 01:45:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 01:45:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 731 transitions. [2022-11-23 01:45:26,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4925876010781671 [2022-11-23 01:45:26,941 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 731 transitions. [2022-11-23 01:45:26,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 731 transitions. [2022-11-23 01:45:26,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:26,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 731 transitions. [2022-11-23 01:45:26,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:26,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:26,948 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:26,948 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 95 flow. Second operand 4 states and 731 transitions. [2022-11-23 01:45:26,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 261 flow [2022-11-23 01:45:26,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 61 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:45:26,952 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 114 flow [2022-11-23 01:45:26,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2022-11-23 01:45:26,953 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2022-11-23 01:45:26,953 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 114 flow [2022-11-23 01:45:26,953 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) [2022-11-23 01:45:26,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:26,954 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:45:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 01:45:26,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash 723962053, now seen corresponding path program 1 times [2022-11-23 01:45:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:26,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617862559] [2022-11-23 01:45:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:26,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:27,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617862559] [2022-11-23 01:45:27,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617862559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:27,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:27,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:45:27,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816897911] [2022-11-23 01:45:27,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:27,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:45:27,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:27,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:45:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:45:27,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 371 [2022-11-23 01:45:27,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:27,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:27,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 371 [2022-11-23 01:45:27,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:27,227 INFO L130 PetriNetUnfolder]: 615/1052 cut-off events. [2022-11-23 01:45:27,228 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-11-23 01:45:27,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2300 conditions, 1052 events. 615/1052 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4601 event pairs, 276 based on Foata normal form. 0/896 useless extension candidates. Maximal degree in co-relation 2293. Up to 922 conditions per place. [2022-11-23 01:45:27,234 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 54 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2022-11-23 01:45:27,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 271 flow [2022-11-23 01:45:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:45:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:45:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-11-23 01:45:27,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5103324348607368 [2022-11-23 01:45:27,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-11-23 01:45:27,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-11-23 01:45:27,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:27,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-11-23 01:45:27,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:27,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:27,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:27,241 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 114 flow. Second operand 3 states and 568 transitions. [2022-11-23 01:45:27,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 271 flow [2022-11-23 01:45:27,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:45:27,245 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 125 flow [2022-11-23 01:45:27,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=3, PETRI_FLOW=125, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-11-23 01:45:27,248 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2022-11-23 01:45:27,248 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 125 flow [2022-11-23 01:45:27,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:27,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:27,249 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:45:27,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 01:45:27,250 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:27,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1236702702, now seen corresponding path program 1 times [2022-11-23 01:45:27,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:27,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209061650] [2022-11-23 01:45:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:27,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:27,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:27,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209061650] [2022-11-23 01:45:27,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209061650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:27,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:27,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 01:45:27,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325974263] [2022-11-23 01:45:27,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:27,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:45:27,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:27,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:45:27,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:45:27,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 371 [2022-11-23 01:45:27,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 125 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) [2022-11-23 01:45:27,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:27,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 371 [2022-11-23 01:45:27,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:27,538 INFO L130 PetriNetUnfolder]: 638/1077 cut-off events. [2022-11-23 01:45:27,538 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2022-11-23 01:45:27,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2555 conditions, 1077 events. 638/1077 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4713 event pairs, 219 based on Foata normal form. 10/927 useless extension candidates. Maximal degree in co-relation 2547. Up to 861 conditions per place. [2022-11-23 01:45:27,545 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 58 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2022-11-23 01:45:27,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 293 flow [2022-11-23 01:45:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:45:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:45:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2022-11-23 01:45:27,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5148247978436657 [2022-11-23 01:45:27,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2022-11-23 01:45:27,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2022-11-23 01:45:27,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:27,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2022-11-23 01:45:27,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:27,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:27,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:27,555 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 125 flow. Second operand 3 states and 573 transitions. [2022-11-23 01:45:27,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 293 flow [2022-11-23 01:45:27,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:45:27,560 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 130 flow [2022-11-23 01:45:27,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2022-11-23 01:45:27,562 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2022-11-23 01:45:27,564 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 130 flow [2022-11-23 01:45:27,565 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) [2022-11-23 01:45:27,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:27,565 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:45:27,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 01:45:27,565 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1770743497, now seen corresponding path program 1 times [2022-11-23 01:45:27,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:27,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348480890] [2022-11-23 01:45:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:27,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:28,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348480890] [2022-11-23 01:45:28,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348480890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:45:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24524743] [2022-11-23 01:45:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:28,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:45:28,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:45:28,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:45:28,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 01:45:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:28,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 01:45:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:45:28,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:45:28,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:45:28,339 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 01:45:28,340 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 [2022-11-23 01:45:28,387 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-23 01:45:28,387 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 [2022-11-23 01:45:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:28,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:45:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:28,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24524743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:45:28,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:45:28,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-11-23 01:45:28,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937287156] [2022-11-23 01:45:28,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:45:28,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 01:45:28,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 01:45:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-23 01:45:29,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 371 [2022-11-23 01:45:29,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 130 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) [2022-11-23 01:45:29,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:29,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 371 [2022-11-23 01:45:29,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:31,111 INFO L130 PetriNetUnfolder]: 1709/2796 cut-off events. [2022-11-23 01:45:31,111 INFO L131 PetriNetUnfolder]: For 714/714 co-relation queries the response was YES. [2022-11-23 01:45:31,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6777 conditions, 2796 events. 1709/2796 cut-off events. For 714/714 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 13201 event pairs, 173 based on Foata normal form. 84/2502 useless extension candidates. Maximal degree in co-relation 6768. Up to 1096 conditions per place. [2022-11-23 01:45:31,127 INFO L137 encePairwiseOnDemand]: 362/371 looper letters, 173 selfloop transitions, 15 changer transitions 0/188 dead transitions. [2022-11-23 01:45:31,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 188 transitions, 880 flow [2022-11-23 01:45:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 01:45:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 01:45:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1932 transitions. [2022-11-23 01:45:31,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4734133790737564 [2022-11-23 01:45:31,133 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1932 transitions. [2022-11-23 01:45:31,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1932 transitions. [2022-11-23 01:45:31,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:31,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1932 transitions. [2022-11-23 01:45:31,138 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) [2022-11-23 01:45:31,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 371.0) internal successors, (4452), 12 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:31,146 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 371.0) internal successors, (4452), 12 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:31,146 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 130 flow. Second operand 11 states and 1932 transitions. [2022-11-23 01:45:31,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 188 transitions, 880 flow [2022-11-23 01:45:31,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 188 transitions, 877 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:45:31,154 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 250 flow [2022-11-23 01:45:31,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=250, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2022-11-23 01:45:31,156 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 13 predicate places. [2022-11-23 01:45:31,156 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 250 flow [2022-11-23 01:45:31,158 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) [2022-11-23 01:45:31,158 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:31,158 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:45:31,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 01:45:31,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 01:45:31,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1974004495, now seen corresponding path program 1 times [2022-11-23 01:45:31,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:31,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845765203] [2022-11-23 01:45:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:31,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:31,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:31,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845765203] [2022-11-23 01:45:31,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845765203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:31,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:31,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 01:45:31,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017252832] [2022-11-23 01:45:31,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:31,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:45:31,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:31,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:45:31,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:45:31,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 371 [2022-11-23 01:45:31,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 250 flow. Second operand has 3 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) [2022-11-23 01:45:31,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:31,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 371 [2022-11-23 01:45:31,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:31,681 INFO L130 PetriNetUnfolder]: 487/940 cut-off events. [2022-11-23 01:45:31,682 INFO L131 PetriNetUnfolder]: For 887/887 co-relation queries the response was YES. [2022-11-23 01:45:31,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2522 conditions, 940 events. 487/940 cut-off events. For 887/887 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4117 event pairs, 73 based on Foata normal form. 46/924 useless extension candidates. Maximal degree in co-relation 2507. Up to 682 conditions per place. [2022-11-23 01:45:31,697 INFO L137 encePairwiseOnDemand]: 366/371 looper letters, 44 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2022-11-23 01:45:31,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 344 flow [2022-11-23 01:45:31,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:45:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:45:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2022-11-23 01:45:31,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2022-11-23 01:45:31,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2022-11-23 01:45:31,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2022-11-23 01:45:31,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:31,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2022-11-23 01:45:31,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:31,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:31,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:31,705 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 250 flow. Second operand 3 states and 553 transitions. [2022-11-23 01:45:31,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 344 flow [2022-11-23 01:45:31,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 322 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-23 01:45:31,711 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 210 flow [2022-11-23 01:45:31,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2022-11-23 01:45:31,712 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2022-11-23 01:45:31,712 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 210 flow [2022-11-23 01:45:31,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-11-23 01:45:31,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:31,713 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:45:31,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 01:45:31,713 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:31,714 INFO L85 PathProgramCache]: Analyzing trace with hash -984997611, now seen corresponding path program 1 times [2022-11-23 01:45:31,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:31,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287909680] [2022-11-23 01:45:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:31,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:31,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:31,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287909680] [2022-11-23 01:45:31,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287909680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:31,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:31,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 01:45:31,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403480337] [2022-11-23 01:45:31,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 01:45:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 01:45:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 01:45:32,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-11-23 01:45:32,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:32,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:32,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-11-23 01:45:32,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:32,319 INFO L130 PetriNetUnfolder]: 627/1196 cut-off events. [2022-11-23 01:45:32,319 INFO L131 PetriNetUnfolder]: For 610/610 co-relation queries the response was YES. [2022-11-23 01:45:32,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3218 conditions, 1196 events. 627/1196 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5374 event pairs, 55 based on Foata normal form. 0/1190 useless extension candidates. Maximal degree in co-relation 3204. Up to 615 conditions per place. [2022-11-23 01:45:32,327 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 70 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2022-11-23 01:45:32,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 491 flow [2022-11-23 01:45:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 01:45:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 01:45:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1216 transitions. [2022-11-23 01:45:32,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46823257604928764 [2022-11-23 01:45:32,332 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1216 transitions. [2022-11-23 01:45:32,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1216 transitions. [2022-11-23 01:45:32,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:32,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1216 transitions. [2022-11-23 01:45:32,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.71428571428572) internal successors, (1216), 7 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:32,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 371.0) internal successors, (2968), 8 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:32,342 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 371.0) internal successors, (2968), 8 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:32,342 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 210 flow. Second operand 7 states and 1216 transitions. [2022-11-23 01:45:32,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 491 flow [2022-11-23 01:45:32,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:45:32,349 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 237 flow [2022-11-23 01:45:32,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=237, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2022-11-23 01:45:32,351 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2022-11-23 01:45:32,351 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 237 flow [2022-11-23 01:45:32,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:32,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:32,352 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:45:32,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 01:45:32,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash -90630814, now seen corresponding path program 1 times [2022-11-23 01:45:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:32,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802863755] [2022-11-23 01:45:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:32,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:32,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:32,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802863755] [2022-11-23 01:45:32,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802863755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:32,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:32,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 01:45:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133596277] [2022-11-23 01:45:32,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:32,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 01:45:32,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 01:45:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-23 01:45:33,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 371 [2022-11-23 01:45:33,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 237 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) [2022-11-23 01:45:33,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:33,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 371 [2022-11-23 01:45:33,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:34,731 INFO L130 PetriNetUnfolder]: 849/1554 cut-off events. [2022-11-23 01:45:34,731 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-11-23 01:45:34,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4276 conditions, 1554 events. 849/1554 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7116 event pairs, 169 based on Foata normal form. 12/1514 useless extension candidates. Maximal degree in co-relation 4259. Up to 952 conditions per place. [2022-11-23 01:45:34,741 INFO L137 encePairwiseOnDemand]: 357/371 looper letters, 133 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2022-11-23 01:45:34,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 149 transitions, 849 flow [2022-11-23 01:45:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 01:45:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 01:45:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1945 transitions. [2022-11-23 01:45:34,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43688230008984724 [2022-11-23 01:45:34,747 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1945 transitions. [2022-11-23 01:45:34,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1945 transitions. [2022-11-23 01:45:34,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:34,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1945 transitions. [2022-11-23 01:45:34,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.08333333333334) internal successors, (1945), 12 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:34,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:34,761 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:34,761 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 237 flow. Second operand 12 states and 1945 transitions. [2022-11-23 01:45:34,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 149 transitions, 849 flow [2022-11-23 01:45:34,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 149 transitions, 842 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-23 01:45:34,768 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 358 flow [2022-11-23 01:45:34,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=358, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2022-11-23 01:45:34,769 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 31 predicate places. [2022-11-23 01:45:34,769 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 358 flow [2022-11-23 01:45:34,770 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) [2022-11-23 01:45:34,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:34,771 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] [2022-11-23 01:45:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 01:45:34,771 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:34,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1809754542, now seen corresponding path program 1 times [2022-11-23 01:45:34,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:34,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816531065] [2022-11-23 01:45:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:34,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 01:45:34,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:34,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816531065] [2022-11-23 01:45:34,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816531065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:34,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:34,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 01:45:34,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353205338] [2022-11-23 01:45:34,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:34,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:45:34,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:45:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:45:34,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 371 [2022-11-23 01:45:34,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:34,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:34,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 371 [2022-11-23 01:45:34,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:35,208 INFO L130 PetriNetUnfolder]: 987/1898 cut-off events. [2022-11-23 01:45:35,208 INFO L131 PetriNetUnfolder]: For 1790/1794 co-relation queries the response was YES. [2022-11-23 01:45:35,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5687 conditions, 1898 events. 987/1898 cut-off events. For 1790/1794 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 9917 event pairs, 573 based on Foata normal form. 70/1900 useless extension candidates. Maximal degree in co-relation 5663. Up to 1351 conditions per place. [2022-11-23 01:45:35,220 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 94 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2022-11-23 01:45:35,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 101 transitions, 782 flow [2022-11-23 01:45:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:45:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:45:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2022-11-23 01:45:35,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2022-11-23 01:45:35,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2022-11-23 01:45:35,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2022-11-23 01:45:35,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:35,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2022-11-23 01:45:35,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:35,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:35,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:35,228 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 358 flow. Second operand 3 states and 574 transitions. [2022-11-23 01:45:35,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 101 transitions, 782 flow [2022-11-23 01:45:35,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 763 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-23 01:45:35,238 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 363 flow [2022-11-23 01:45:35,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=363, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2022-11-23 01:45:35,239 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 31 predicate places. [2022-11-23 01:45:35,239 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 363 flow [2022-11-23 01:45:35,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:35,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:35,239 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 01:45:35,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 01:45:35,240 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash -738948278, now seen corresponding path program 1 times [2022-11-23 01:45:35,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:35,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143750763] [2022-11-23 01:45:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:35,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:35,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:35,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143750763] [2022-11-23 01:45:35,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143750763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:45:35,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425341320] [2022-11-23 01:45:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:35,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:45:35,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:45:35,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:45:35,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 01:45:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:35,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 01:45:35,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:45:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:35,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:45:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:35,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425341320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:45:35,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:45:35,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-23 01:45:35,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149793858] [2022-11-23 01:45:35,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:45:35,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 01:45:35,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 01:45:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-23 01:45:35,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-11-23 01:45:35,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 363 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) [2022-11-23 01:45:35,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:35,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-11-23 01:45:35,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:36,708 INFO L130 PetriNetUnfolder]: 2081/3874 cut-off events. [2022-11-23 01:45:36,708 INFO L131 PetriNetUnfolder]: For 3819/3819 co-relation queries the response was YES. [2022-11-23 01:45:36,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12207 conditions, 3874 events. 2081/3874 cut-off events. For 3819/3819 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 20162 event pairs, 513 based on Foata normal form. 114/3970 useless extension candidates. Maximal degree in co-relation 12181. Up to 989 conditions per place. [2022-11-23 01:45:36,741 INFO L137 encePairwiseOnDemand]: 363/371 looper letters, 204 selfloop transitions, 41 changer transitions 0/245 dead transitions. [2022-11-23 01:45:36,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 245 transitions, 1717 flow [2022-11-23 01:45:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 01:45:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 01:45:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2336 transitions. [2022-11-23 01:45:36,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48434584283640886 [2022-11-23 01:45:36,748 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2336 transitions. [2022-11-23 01:45:36,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2336 transitions. [2022-11-23 01:45:36,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:36,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2336 transitions. [2022-11-23 01:45:36,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 179.69230769230768) internal successors, (2336), 13 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:36,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 371.0) internal successors, (5194), 14 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:36,762 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 371.0) internal successors, (5194), 14 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:36,763 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 363 flow. Second operand 13 states and 2336 transitions. [2022-11-23 01:45:36,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 245 transitions, 1717 flow [2022-11-23 01:45:36,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 245 transitions, 1697 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-23 01:45:36,785 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 764 flow [2022-11-23 01:45:36,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=764, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2022-11-23 01:45:36,786 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 49 predicate places. [2022-11-23 01:45:36,786 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 764 flow [2022-11-23 01:45:36,787 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) [2022-11-23 01:45:36,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:36,787 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] [2022-11-23 01:45:36,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 01:45:36,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 01:45:36,993 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:36,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:36,994 INFO L85 PathProgramCache]: Analyzing trace with hash 748502580, now seen corresponding path program 1 times [2022-11-23 01:45:36,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:36,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950021200] [2022-11-23 01:45:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:36,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:37,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:37,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950021200] [2022-11-23 01:45:37,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950021200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:37,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:37,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 01:45:37,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770319869] [2022-11-23 01:45:37,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:37,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 01:45:37,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:37,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 01:45:37,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-23 01:45:39,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 371 [2022-11-23 01:45:39,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 764 flow. Second operand has 15 states, 15 states have (on average 143.4) internal successors, (2151), 15 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:39,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:39,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 371 [2022-11-23 01:45:39,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:40,959 INFO L130 PetriNetUnfolder]: 2227/4220 cut-off events. [2022-11-23 01:45:40,959 INFO L131 PetriNetUnfolder]: For 6236/6236 co-relation queries the response was YES. [2022-11-23 01:45:40,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14254 conditions, 4220 events. 2227/4220 cut-off events. For 6236/6236 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 23063 event pairs, 672 based on Foata normal form. 12/4206 useless extension candidates. Maximal degree in co-relation 14221. Up to 3382 conditions per place. [2022-11-23 01:45:40,999 INFO L137 encePairwiseOnDemand]: 355/371 looper letters, 165 selfloop transitions, 29 changer transitions 0/201 dead transitions. [2022-11-23 01:45:40,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 201 transitions, 1591 flow [2022-11-23 01:45:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 01:45:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 01:45:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2698 transitions. [2022-11-23 01:45:41,006 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40401317759808325 [2022-11-23 01:45:41,006 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2698 transitions. [2022-11-23 01:45:41,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2698 transitions. [2022-11-23 01:45:41,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:41,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2698 transitions. [2022-11-23 01:45:41,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 149.88888888888889) internal successors, (2698), 18 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:41,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 371.0) internal successors, (7049), 19 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:41,025 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 371.0) internal successors, (7049), 19 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:41,025 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 764 flow. Second operand 18 states and 2698 transitions. [2022-11-23 01:45:41,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 201 transitions, 1591 flow [2022-11-23 01:45:41,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 201 transitions, 1540 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-11-23 01:45:41,059 INFO L231 Difference]: Finished difference. Result has 123 places, 120 transitions, 960 flow [2022-11-23 01:45:41,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=960, PETRI_PLACES=123, PETRI_TRANSITIONS=120} [2022-11-23 01:45:41,060 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 75 predicate places. [2022-11-23 01:45:41,060 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 120 transitions, 960 flow [2022-11-23 01:45:41,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 143.4) internal successors, (2151), 15 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:41,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:41,061 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] [2022-11-23 01:45:41,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 01:45:41,062 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1841529782, now seen corresponding path program 2 times [2022-11-23 01:45:41,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:41,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983236851] [2022-11-23 01:45:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:41,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:42,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983236851] [2022-11-23 01:45:42,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983236851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:42,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:42,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-23 01:45:42,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498544458] [2022-11-23 01:45:42,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:42,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 01:45:42,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:42,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 01:45:42,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-23 01:45:43,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 371 [2022-11-23 01:45:44,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 960 flow. Second operand has 16 states, 16 states have (on average 140.3125) internal successors, (2245), 16 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:44,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:44,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 371 [2022-11-23 01:45:44,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:45,948 INFO L130 PetriNetUnfolder]: 2449/4646 cut-off events. [2022-11-23 01:45:45,948 INFO L131 PetriNetUnfolder]: For 6869/6869 co-relation queries the response was YES. [2022-11-23 01:45:45,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16236 conditions, 4646 events. 2449/4646 cut-off events. For 6869/6869 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 26096 event pairs, 764 based on Foata normal form. 6/4622 useless extension candidates. Maximal degree in co-relation 16193. Up to 3400 conditions per place. [2022-11-23 01:45:45,994 INFO L137 encePairwiseOnDemand]: 355/371 looper letters, 164 selfloop transitions, 35 changer transitions 0/206 dead transitions. [2022-11-23 01:45:45,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 206 transitions, 1739 flow [2022-11-23 01:45:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 01:45:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 01:45:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2077 transitions. [2022-11-23 01:45:46,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39988448209472466 [2022-11-23 01:45:46,001 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2077 transitions. [2022-11-23 01:45:46,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2077 transitions. [2022-11-23 01:45:46,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:46,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2077 transitions. [2022-11-23 01:45:46,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 148.35714285714286) internal successors, (2077), 14 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:46,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 371.0) internal successors, (5565), 15 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:46,015 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 371.0) internal successors, (5565), 15 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:46,015 INFO L175 Difference]: Start difference. First operand has 123 places, 120 transitions, 960 flow. Second operand 14 states and 2077 transitions. [2022-11-23 01:45:46,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 206 transitions, 1739 flow [2022-11-23 01:45:46,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 206 transitions, 1718 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-23 01:45:46,066 INFO L231 Difference]: Finished difference. Result has 140 places, 130 transitions, 1145 flow [2022-11-23 01:45:46,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1145, PETRI_PLACES=140, PETRI_TRANSITIONS=130} [2022-11-23 01:45:46,067 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 92 predicate places. [2022-11-23 01:45:46,067 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 130 transitions, 1145 flow [2022-11-23 01:45:46,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 140.3125) internal successors, (2245), 16 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:46,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:46,068 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] [2022-11-23 01:45:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 01:45:46,068 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:46,069 INFO L85 PathProgramCache]: Analyzing trace with hash 107111094, now seen corresponding path program 3 times [2022-11-23 01:45:46,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:46,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481352182] [2022-11-23 01:45:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:46,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481352182] [2022-11-23 01:45:46,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481352182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:46,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:46,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-23 01:45:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730252420] [2022-11-23 01:45:46,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:46,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 01:45:46,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 01:45:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-23 01:45:49,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 371 [2022-11-23 01:45:49,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 130 transitions, 1145 flow. Second operand has 16 states, 16 states have (on average 140.3125) internal successors, (2245), 16 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:49,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:49,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 371 [2022-11-23 01:45:49,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:50,982 INFO L130 PetriNetUnfolder]: 2443/4634 cut-off events. [2022-11-23 01:45:50,983 INFO L131 PetriNetUnfolder]: For 7734/7734 co-relation queries the response was YES. [2022-11-23 01:45:51,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16714 conditions, 4634 events. 2443/4634 cut-off events. For 7734/7734 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 25953 event pairs, 701 based on Foata normal form. 6/4612 useless extension candidates. Maximal degree in co-relation 16664. Up to 2991 conditions per place. [2022-11-23 01:45:51,034 INFO L137 encePairwiseOnDemand]: 355/371 looper letters, 155 selfloop transitions, 45 changer transitions 0/207 dead transitions. [2022-11-23 01:45:51,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 207 transitions, 1848 flow [2022-11-23 01:45:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 01:45:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 01:45:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2216 transitions. [2022-11-23 01:45:51,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3982030548068284 [2022-11-23 01:45:51,041 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2216 transitions. [2022-11-23 01:45:51,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2216 transitions. [2022-11-23 01:45:51,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:51,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2216 transitions. [2022-11-23 01:45:51,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 147.73333333333332) internal successors, (2216), 15 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:51,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 371.0) internal successors, (5936), 16 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:51,055 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 371.0) internal successors, (5936), 16 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:51,055 INFO L175 Difference]: Start difference. First operand has 140 places, 130 transitions, 1145 flow. Second operand 15 states and 2216 transitions. [2022-11-23 01:45:51,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 207 transitions, 1848 flow [2022-11-23 01:45:51,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 207 transitions, 1807 flow, removed 9 selfloop flow, removed 5 redundant places. [2022-11-23 01:45:51,186 INFO L231 Difference]: Finished difference. Result has 153 places, 136 transitions, 1282 flow [2022-11-23 01:45:51,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1282, PETRI_PLACES=153, PETRI_TRANSITIONS=136} [2022-11-23 01:45:51,187 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 105 predicate places. [2022-11-23 01:45:51,187 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 136 transitions, 1282 flow [2022-11-23 01:45:51,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 140.3125) internal successors, (2245), 16 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:51,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:51,189 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] [2022-11-23 01:45:51,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 01:45:51,189 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)] === [2022-11-23 01:45:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:51,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1914011324, now seen corresponding path program 1 times [2022-11-23 01:45:51,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:51,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401952352] [2022-11-23 01:45:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:51,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 01:45:51,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401952352] [2022-11-23 01:45:51,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401952352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:45:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591758724] [2022-11-23 01:45:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:51,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:45:51,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:45:51,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:45:51,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 01:45:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:51,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 01:45:51,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:45:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 01:45:51,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:45:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 01:45:51,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591758724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:45:51,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:45:51,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 01:45:51,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460149093] [2022-11-23 01:45:51,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:45:51,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 01:45:51,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 01:45:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 01:45:51,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 371 [2022-11-23 01:45:51,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 136 transitions, 1282 flow. Second operand has 7 states, 7 states have (on average 174.28571428571428) internal successors, (1220), 7 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:51,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:51,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 371 [2022-11-23 01:45:51,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:53,308 INFO L130 PetriNetUnfolder]: 4013/8166 cut-off events. [2022-11-23 01:45:53,308 INFO L131 PetriNetUnfolder]: For 17262/17262 co-relation queries the response was YES. [2022-11-23 01:45:53,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30163 conditions, 8166 events. 4013/8166 cut-off events. For 17262/17262 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 55966 event pairs, 1350 based on Foata normal form. 1168/9293 useless extension candidates. Maximal degree in co-relation 30108. Up to 2053 conditions per place. [2022-11-23 01:45:53,372 INFO L137 encePairwiseOnDemand]: 366/371 looper letters, 349 selfloop transitions, 16 changer transitions 0/382 dead transitions. [2022-11-23 01:45:53,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 382 transitions, 4288 flow [2022-11-23 01:45:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 01:45:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 01:45:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1150 transitions. [2022-11-23 01:45:53,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5166217430368374 [2022-11-23 01:45:53,376 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1150 transitions. [2022-11-23 01:45:53,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1150 transitions. [2022-11-23 01:45:53,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:53,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1150 transitions. [2022-11-23 01:45:53,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.66666666666666) internal successors, (1150), 6 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:53,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:53,382 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:53,383 INFO L175 Difference]: Start difference. First operand has 153 places, 136 transitions, 1282 flow. Second operand 6 states and 1150 transitions. [2022-11-23 01:45:53,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 382 transitions, 4288 flow [2022-11-23 01:45:53,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 382 transitions, 4138 flow, removed 18 selfloop flow, removed 9 redundant places. [2022-11-23 01:45:53,486 INFO L231 Difference]: Finished difference. Result has 153 places, 143 transitions, 1352 flow [2022-11-23 01:45:53,487 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1352, PETRI_PLACES=153, PETRI_TRANSITIONS=143} [2022-11-23 01:45:53,487 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 105 predicate places. [2022-11-23 01:45:53,487 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 143 transitions, 1352 flow [2022-11-23 01:45:53,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 174.28571428571428) internal successors, (1220), 7 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:53,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:53,488 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:45:53,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 01:45:53,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:45:53,700 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:53,701 INFO L85 PathProgramCache]: Analyzing trace with hash -441530206, now seen corresponding path program 1 times [2022-11-23 01:45:53,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:53,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29968012] [2022-11-23 01:45:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:53,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 01:45:53,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:53,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29968012] [2022-11-23 01:45:53,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29968012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:45:53,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:45:53,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 01:45:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393447807] [2022-11-23 01:45:53,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:45:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:45:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:45:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:45:53,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 371 [2022-11-23 01:45:53,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 143 transitions, 1352 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:53,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:53,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 371 [2022-11-23 01:45:53,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:45:55,507 INFO L130 PetriNetUnfolder]: 3913/7885 cut-off events. [2022-11-23 01:45:55,507 INFO L131 PetriNetUnfolder]: For 21503/21503 co-relation queries the response was YES. [2022-11-23 01:45:55,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31028 conditions, 7885 events. 3913/7885 cut-off events. For 21503/21503 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 52139 event pairs, 2193 based on Foata normal form. 240/8084 useless extension candidates. Maximal degree in co-relation 30969. Up to 5408 conditions per place. [2022-11-23 01:45:55,570 INFO L137 encePairwiseOnDemand]: 365/371 looper letters, 127 selfloop transitions, 19 changer transitions 0/155 dead transitions. [2022-11-23 01:45:55,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 155 transitions, 1671 flow [2022-11-23 01:45:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:45:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:45:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2022-11-23 01:45:55,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2022-11-23 01:45:55,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2022-11-23 01:45:55,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2022-11-23 01:45:55,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:45:55,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2022-11-23 01:45:55,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:55,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:55,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:55,577 INFO L175 Difference]: Start difference. First operand has 153 places, 143 transitions, 1352 flow. Second operand 3 states and 560 transitions. [2022-11-23 01:45:55,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 155 transitions, 1671 flow [2022-11-23 01:45:55,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 155 transitions, 1636 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-11-23 01:45:55,679 INFO L231 Difference]: Finished difference. Result has 154 places, 134 transitions, 1309 flow [2022-11-23 01:45:55,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1309, PETRI_PLACES=154, PETRI_TRANSITIONS=134} [2022-11-23 01:45:55,680 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 106 predicate places. [2022-11-23 01:45:55,680 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 134 transitions, 1309 flow [2022-11-23 01:45:55,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:45:55,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:45:55,680 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] [2022-11-23 01:45:55,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 01:45:55,681 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:45:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:45:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash 258790701, now seen corresponding path program 1 times [2022-11-23 01:45:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:45:55,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118180403] [2022-11-23 01:45:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:45:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:55,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:45:55,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118180403] [2022-11-23 01:45:55,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118180403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:45:55,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595467232] [2022-11-23 01:45:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:45:55,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:45:55,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:45:55,959 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:45:55,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 01:45:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:45:56,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 01:45:56,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:45:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:56,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:45:56,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 01:45:56,780 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 [2022-11-23 01:45:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:45:56,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595467232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:45:56,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:45:56,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 26 [2022-11-23 01:45:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986313131] [2022-11-23 01:45:56,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:45:56,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 01:45:56,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:45:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 01:45:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-11-23 01:45:59,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 371 [2022-11-23 01:45:59,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 134 transitions, 1309 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) [2022-11-23 01:45:59,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:45:59,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 371 [2022-11-23 01:45:59,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:46:04,569 INFO L130 PetriNetUnfolder]: 4671/9184 cut-off events. [2022-11-23 01:46:04,570 INFO L131 PetriNetUnfolder]: For 28327/28327 co-relation queries the response was YES. [2022-11-23 01:46:04,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37061 conditions, 9184 events. 4671/9184 cut-off events. For 28327/28327 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 61670 event pairs, 545 based on Foata normal form. 122/9256 useless extension candidates. Maximal degree in co-relation 37001. Up to 2052 conditions per place. [2022-11-23 01:46:04,637 INFO L137 encePairwiseOnDemand]: 356/371 looper letters, 261 selfloop transitions, 122 changer transitions 0/383 dead transitions. [2022-11-23 01:46:04,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 383 transitions, 3581 flow [2022-11-23 01:46:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-23 01:46:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-23 01:46:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5556 transitions. [2022-11-23 01:46:04,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4159928122192273 [2022-11-23 01:46:04,648 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5556 transitions. [2022-11-23 01:46:04,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5556 transitions. [2022-11-23 01:46:04,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:46:04,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5556 transitions. [2022-11-23 01:46:04,658 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) [2022-11-23 01:46:04,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 371.0) internal successors, (13727), 37 states have internal predecessors, (13727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:04,676 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 371.0) internal successors, (13727), 37 states have internal predecessors, (13727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:04,677 INFO L175 Difference]: Start difference. First operand has 154 places, 134 transitions, 1309 flow. Second operand 36 states and 5556 transitions. [2022-11-23 01:46:04,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 383 transitions, 3581 flow [2022-11-23 01:46:04,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 383 transitions, 3489 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-11-23 01:46:04,810 INFO L231 Difference]: Finished difference. Result has 187 places, 181 transitions, 1902 flow [2022-11-23 01:46:04,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1902, PETRI_PLACES=187, PETRI_TRANSITIONS=181} [2022-11-23 01:46:04,811 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 139 predicate places. [2022-11-23 01:46:04,811 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 181 transitions, 1902 flow [2022-11-23 01:46:04,812 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) [2022-11-23 01:46:04,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:46:04,812 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] [2022-11-23 01:46:04,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 01:46:05,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:05,019 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:46:05,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:05,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1070304788, now seen corresponding path program 1 times [2022-11-23 01:46:05,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:05,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399794757] [2022-11-23 01:46:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:05,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:46:05,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:05,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399794757] [2022-11-23 01:46:05,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399794757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:46:05,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553369546] [2022-11-23 01:46:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:05,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:05,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:46:05,132 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:46:05,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 01:46:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 01:46:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:46:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 01:46:05,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:46:05,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553369546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:46:05,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 01:46:05,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-23 01:46:05,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983752683] [2022-11-23 01:46:05,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:46:05,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 01:46:05,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:05,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 01:46:05,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 01:46:05,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 371 [2022-11-23 01:46:05,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 181 transitions, 1902 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) [2022-11-23 01:46:05,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:46:05,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 371 [2022-11-23 01:46:05,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:46:07,303 INFO L130 PetriNetUnfolder]: 4733/9346 cut-off events. [2022-11-23 01:46:07,303 INFO L131 PetriNetUnfolder]: For 29763/29763 co-relation queries the response was YES. [2022-11-23 01:46:07,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39130 conditions, 9346 events. 4733/9346 cut-off events. For 29763/29763 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 63139 event pairs, 1592 based on Foata normal form. 74/9384 useless extension candidates. Maximal degree in co-relation 39069. Up to 4996 conditions per place. [2022-11-23 01:46:07,367 INFO L137 encePairwiseOnDemand]: 363/371 looper letters, 208 selfloop transitions, 35 changer transitions 0/243 dead transitions. [2022-11-23 01:46:07,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 243 transitions, 2751 flow [2022-11-23 01:46:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 01:46:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 01:46:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1065 transitions. [2022-11-23 01:46:07,369 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4784366576819407 [2022-11-23 01:46:07,369 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1065 transitions. [2022-11-23 01:46:07,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1065 transitions. [2022-11-23 01:46:07,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:46:07,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1065 transitions. [2022-11-23 01:46:07,372 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) [2022-11-23 01:46:07,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:07,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:07,375 INFO L175 Difference]: Start difference. First operand has 187 places, 181 transitions, 1902 flow. Second operand 6 states and 1065 transitions. [2022-11-23 01:46:07,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 243 transitions, 2751 flow [2022-11-23 01:46:07,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 243 transitions, 2392 flow, removed 119 selfloop flow, removed 12 redundant places. [2022-11-23 01:46:07,535 INFO L231 Difference]: Finished difference. Result has 183 places, 179 transitions, 1703 flow [2022-11-23 01:46:07,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1703, PETRI_PLACES=183, PETRI_TRANSITIONS=179} [2022-11-23 01:46:07,536 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 135 predicate places. [2022-11-23 01:46:07,536 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 179 transitions, 1703 flow [2022-11-23 01:46:07,536 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) [2022-11-23 01:46:07,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:46:07,537 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-23 01:46:07,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 01:46:07,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:07,742 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:46:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:07,743 INFO L85 PathProgramCache]: Analyzing trace with hash -98910985, now seen corresponding path program 2 times [2022-11-23 01:46:07,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:07,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104464145] [2022-11-23 01:46:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:07,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:46:08,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104464145] [2022-11-23 01:46:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104464145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:46:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486951404] [2022-11-23 01:46:08,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:46:08,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:08,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:46:08,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:46:08,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 01:46:08,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:46:08,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:46:08,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 01:46:08,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:46:08,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:46:08,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:46:08,848 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 01:46:08,848 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 [2022-11-23 01:46:08,874 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-23 01:46:08,875 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 [2022-11-23 01:46:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:46:09,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:46:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:46:09,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486951404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:46:09,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:46:09,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 31 [2022-11-23 01:46:09,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441012259] [2022-11-23 01:46:09,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:46:09,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 01:46:09,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 01:46:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 01:46:15,281 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 371 [2022-11-23 01:46:15,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 179 transitions, 1703 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) [2022-11-23 01:46:15,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:46:15,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 371 [2022-11-23 01:46:15,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:46:20,154 INFO L130 PetriNetUnfolder]: 6841/13502 cut-off events. [2022-11-23 01:46:20,154 INFO L131 PetriNetUnfolder]: For 38852/38852 co-relation queries the response was YES. [2022-11-23 01:46:20,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53692 conditions, 13502 events. 6841/13502 cut-off events. For 38852/38852 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 91406 event pairs, 2041 based on Foata normal form. 204/13578 useless extension candidates. Maximal degree in co-relation 53630. Up to 7557 conditions per place. [2022-11-23 01:46:20,278 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 402 selfloop transitions, 48 changer transitions 0/450 dead transitions. [2022-11-23 01:46:20,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 450 transitions, 4361 flow [2022-11-23 01:46:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 01:46:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 01:46:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3535 transitions. [2022-11-23 01:46:20,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4537286612758311 [2022-11-23 01:46:20,285 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3535 transitions. [2022-11-23 01:46:20,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3535 transitions. [2022-11-23 01:46:20,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:46:20,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3535 transitions. [2022-11-23 01:46:20,292 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) [2022-11-23 01:46:20,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 371.0) internal successors, (8162), 22 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:20,301 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 371.0) internal successors, (8162), 22 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:20,301 INFO L175 Difference]: Start difference. First operand has 183 places, 179 transitions, 1703 flow. Second operand 21 states and 3535 transitions. [2022-11-23 01:46:20,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 450 transitions, 4361 flow [2022-11-23 01:46:20,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 450 transitions, 4335 flow, removed 13 selfloop flow, removed 0 redundant places. [2022-11-23 01:46:20,509 INFO L231 Difference]: Finished difference. Result has 214 places, 211 transitions, 2222 flow [2022-11-23 01:46:20,509 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2222, PETRI_PLACES=214, PETRI_TRANSITIONS=211} [2022-11-23 01:46:20,510 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 166 predicate places. [2022-11-23 01:46:20,510 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 211 transitions, 2222 flow [2022-11-23 01:46:20,511 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) [2022-11-23 01:46:20,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:46:20,512 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] [2022-11-23 01:46:20,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 01:46:20,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 01:46:20,717 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:46:20,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:20,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1094291032, now seen corresponding path program 4 times [2022-11-23 01:46:20,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:20,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530350526] [2022-11-23 01:46:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:20,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 01:46:21,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:21,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530350526] [2022-11-23 01:46:21,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530350526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:46:21,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:46:21,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 01:46:21,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897717751] [2022-11-23 01:46:21,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:46:21,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 01:46:21,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 01:46:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-23 01:46:22,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 371 [2022-11-23 01:46:22,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 211 transitions, 2222 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) [2022-11-23 01:46:22,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:46:22,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 371 [2022-11-23 01:46:22,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:46:28,067 INFO L130 PetriNetUnfolder]: 8149/16401 cut-off events. [2022-11-23 01:46:28,067 INFO L131 PetriNetUnfolder]: For 56508/56526 co-relation queries the response was YES. [2022-11-23 01:46:28,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68026 conditions, 16401 events. 8149/16401 cut-off events. For 56508/56526 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 119822 event pairs, 1461 based on Foata normal form. 42/16255 useless extension candidates. Maximal degree in co-relation 67952. Up to 4533 conditions per place. [2022-11-23 01:46:28,218 INFO L137 encePairwiseOnDemand]: 352/371 looper letters, 192 selfloop transitions, 222 changer transitions 0/423 dead transitions. [2022-11-23 01:46:28,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 423 transitions, 4709 flow [2022-11-23 01:46:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 01:46:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 01:46:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4105 transitions. [2022-11-23 01:46:28,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40980333433163624 [2022-11-23 01:46:28,226 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4105 transitions. [2022-11-23 01:46:28,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4105 transitions. [2022-11-23 01:46:28,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:46:28,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4105 transitions. [2022-11-23 01:46:28,234 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) [2022-11-23 01:46:28,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 371.0) internal successors, (10388), 28 states have internal predecessors, (10388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:28,244 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 371.0) internal successors, (10388), 28 states have internal predecessors, (10388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:28,244 INFO L175 Difference]: Start difference. First operand has 214 places, 211 transitions, 2222 flow. Second operand 27 states and 4105 transitions. [2022-11-23 01:46:28,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 423 transitions, 4709 flow [2022-11-23 01:46:28,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 423 transitions, 4558 flow, removed 55 selfloop flow, removed 7 redundant places. [2022-11-23 01:46:28,548 INFO L231 Difference]: Finished difference. Result has 240 places, 316 transitions, 3884 flow [2022-11-23 01:46:28,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=2140, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3884, PETRI_PLACES=240, PETRI_TRANSITIONS=316} [2022-11-23 01:46:28,549 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 192 predicate places. [2022-11-23 01:46:28,549 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 316 transitions, 3884 flow [2022-11-23 01:46:28,549 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) [2022-11-23 01:46:28,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:46:28,550 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] [2022-11-23 01:46:28,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-23 01:46:28,550 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:46:28,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash 819795836, now seen corresponding path program 5 times [2022-11-23 01:46:28,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:28,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68607828] [2022-11-23 01:46:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:28,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:46:29,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:29,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68607828] [2022-11-23 01:46:29,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68607828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:46:29,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884403756] [2022-11-23 01:46:29,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 01:46:29,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:29,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:46:29,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:46:29,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 01:46:29,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:46:29,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:46:29,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-23 01:46:29,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:46:29,950 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-23 01:46:29,950 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 20 treesize of output 22 [2022-11-23 01:46:30,308 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 [2022-11-23 01:46:30,388 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 [2022-11-23 01:46:31,053 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 111 treesize of output 46 [2022-11-23 01:46:33,097 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_arrayElimCell_15_58 Int) (aux_div_v_arrayElimCell_15_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_15_58 4294967296))) (and (< aux_mod_v_arrayElimCell_15_58 4294967296) (= (mod (+ 4294967295 (* 4294967295 aux_mod_v_arrayElimCell_15_58)) 4294967296) |c_t2Thread1of1ForFork1_#t~ret44#1|) (<= (+ .cse0 aux_mod_v_arrayElimCell_15_58 4294967297) 0) (<= 4294966496 aux_mod_v_arrayElimCell_15_58) (< 0 (+ 8589934593 .cse0 aux_mod_v_arrayElimCell_15_58))))) is different from true [2022-11-23 01:46:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 01:46:33,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:46:33,754 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_699 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_699) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-23 01:46:33,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 01:46:33,764 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 [2022-11-23 01:46:33,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 01:46:33,776 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 [2022-11-23 01:46:33,782 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 [2022-11-23 01:46:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 01:46:34,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884403756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:46:34,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:46:34,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2022-11-23 01:46:34,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442110291] [2022-11-23 01:46:34,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:46:34,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-23 01:46:34,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-23 01:46:34,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1769, Unknown=2, NotChecked=170, Total=2070 [2022-11-23 01:46:34,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 371 [2022-11-23 01:46:34,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 316 transitions, 3884 flow. Second operand has 46 states, 46 states have (on average 106.82608695652173) internal successors, (4914), 46 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:34,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:46:34,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 371 [2022-11-23 01:46:34,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:46:55,215 INFO L130 PetriNetUnfolder]: 9348/18471 cut-off events. [2022-11-23 01:46:55,215 INFO L131 PetriNetUnfolder]: For 77720/77720 co-relation queries the response was YES. [2022-11-23 01:46:55,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85372 conditions, 18471 events. 9348/18471 cut-off events. For 77720/77720 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 135311 event pairs, 1178 based on Foata normal form. 11/18283 useless extension candidates. Maximal degree in co-relation 85290. Up to 5976 conditions per place. [2022-11-23 01:46:55,413 INFO L137 encePairwiseOnDemand]: 347/371 looper letters, 190 selfloop transitions, 335 changer transitions 0/525 dead transitions. [2022-11-23 01:46:55,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 525 transitions, 6459 flow [2022-11-23 01:46:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 01:46:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-23 01:46:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3877 transitions. [2022-11-23 01:46:55,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2985752791682711 [2022-11-23 01:46:55,420 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3877 transitions. [2022-11-23 01:46:55,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3877 transitions. [2022-11-23 01:46:55,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:46:55,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3877 transitions. [2022-11-23 01:46:55,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 110.77142857142857) internal successors, (3877), 35 states have internal predecessors, (3877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:55,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 371.0) internal successors, (13356), 36 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:55,440 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 371.0) internal successors, (13356), 36 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:55,440 INFO L175 Difference]: Start difference. First operand has 240 places, 316 transitions, 3884 flow. Second operand 35 states and 3877 transitions. [2022-11-23 01:46:55,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 525 transitions, 6459 flow [2022-11-23 01:46:56,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 525 transitions, 6329 flow, removed 34 selfloop flow, removed 9 redundant places. [2022-11-23 01:46:56,032 INFO L231 Difference]: Finished difference. Result has 272 places, 393 transitions, 5432 flow [2022-11-23 01:46:56,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5432, PETRI_PLACES=272, PETRI_TRANSITIONS=393} [2022-11-23 01:46:56,033 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 224 predicate places. [2022-11-23 01:46:56,033 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 393 transitions, 5432 flow [2022-11-23 01:46:56,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 106.82608695652173) internal successors, (4914), 46 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:56,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:46:56,034 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:46:56,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 01:46:56,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 01:46:56,239 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:46:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1487061958, now seen corresponding path program 2 times [2022-11-23 01:46:56,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:56,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764245896] [2022-11-23 01:46:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:56,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 01:46:56,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:56,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764245896] [2022-11-23 01:46:56,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764245896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:46:56,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527782418] [2022-11-23 01:46:56,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:46:56,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:56,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:46:56,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:46:56,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 01:46:56,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:46:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:46:56,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 01:46:56,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:46:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 01:46:56,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:46:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 01:46:56,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527782418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:46:56,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:46:56,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 01:46:56,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514451507] [2022-11-23 01:46:56,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:46:56,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 01:46:56,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:56,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 01:46:56,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-23 01:46:56,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 371 [2022-11-23 01:46:56,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 393 transitions, 5432 flow. Second operand has 16 states, 16 states have (on average 164.4375) internal successors, (2631), 16 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:46:56,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:46:56,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 371 [2022-11-23 01:46:56,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:47:02,184 INFO L130 PetriNetUnfolder]: 9843/19441 cut-off events. [2022-11-23 01:47:02,184 INFO L131 PetriNetUnfolder]: For 117646/117646 co-relation queries the response was YES. [2022-11-23 01:47:02,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107961 conditions, 19441 events. 9843/19441 cut-off events. For 117646/117646 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 143443 event pairs, 2637 based on Foata normal form. 76/19320 useless extension candidates. Maximal degree in co-relation 107874. Up to 7380 conditions per place. [2022-11-23 01:47:02,631 INFO L137 encePairwiseOnDemand]: 363/371 looper letters, 431 selfloop transitions, 212 changer transitions 0/643 dead transitions. [2022-11-23 01:47:02,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 643 transitions, 9083 flow [2022-11-23 01:47:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 01:47:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 01:47:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2896 transitions. [2022-11-23 01:47:02,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4591723481845568 [2022-11-23 01:47:02,637 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2896 transitions. [2022-11-23 01:47:02,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2896 transitions. [2022-11-23 01:47:02,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:47:02,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2896 transitions. [2022-11-23 01:47:02,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 170.35294117647058) internal successors, (2896), 17 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:02,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 371.0) internal successors, (6678), 18 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:02,651 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 371.0) internal successors, (6678), 18 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:02,651 INFO L175 Difference]: Start difference. First operand has 272 places, 393 transitions, 5432 flow. Second operand 17 states and 2896 transitions. [2022-11-23 01:47:02,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 643 transitions, 9083 flow [2022-11-23 01:47:03,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 643 transitions, 8807 flow, removed 50 selfloop flow, removed 11 redundant places. [2022-11-23 01:47:03,749 INFO L231 Difference]: Finished difference. Result has 275 places, 392 transitions, 5825 flow [2022-11-23 01:47:03,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=4954, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5825, PETRI_PLACES=275, PETRI_TRANSITIONS=392} [2022-11-23 01:47:03,750 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 227 predicate places. [2022-11-23 01:47:03,750 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 392 transitions, 5825 flow [2022-11-23 01:47:03,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 164.4375) internal successors, (2631), 16 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:03,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:47:03,751 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] [2022-11-23 01:47:03,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 01:47:03,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 01:47:03,951 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:47:03,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:47:03,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1951069773, now seen corresponding path program 2 times [2022-11-23 01:47:03,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:47:03,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580355430] [2022-11-23 01:47:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:47:03,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:47:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:47:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:47:05,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:47:05,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580355430] [2022-11-23 01:47:05,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580355430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:47:05,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837415726] [2022-11-23 01:47:05,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:47:05,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:47:05,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:47:05,044 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:47:05,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 01:47:05,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:47:05,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:47:05,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-23 01:47:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:47:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:47:05,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:47:05,264 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 01:47:05,264 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 [2022-11-23 01:47:05,298 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-23 01:47:05,299 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 [2022-11-23 01:47:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 01:47:05,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:47:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:47:06,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837415726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:47:06,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:47:06,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 9] total 29 [2022-11-23 01:47:06,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150582633] [2022-11-23 01:47:06,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:47:06,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 01:47:06,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:47:06,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 01:47:06,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-11-23 01:47:09,221 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 371 [2022-11-23 01:47:09,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 392 transitions, 5825 flow. Second operand has 31 states, 31 states have (on average 148.7741935483871) internal successors, (4612), 31 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:09,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:47:09,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 371 [2022-11-23 01:47:09,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:47:18,377 INFO L130 PetriNetUnfolder]: 12104/23938 cut-off events. [2022-11-23 01:47:18,377 INFO L131 PetriNetUnfolder]: For 146774/146774 co-relation queries the response was YES. [2022-11-23 01:47:18,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136140 conditions, 23938 events. 12104/23938 cut-off events. For 146774/146774 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 186945 event pairs, 3644 based on Foata normal form. 59/23804 useless extension candidates. Maximal degree in co-relation 136053. Up to 13980 conditions per place. [2022-11-23 01:47:18,751 INFO L137 encePairwiseOnDemand]: 357/371 looper letters, 571 selfloop transitions, 133 changer transitions 0/704 dead transitions. [2022-11-23 01:47:18,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 704 transitions, 10336 flow [2022-11-23 01:47:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 01:47:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 01:47:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3740 transitions. [2022-11-23 01:47:18,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4200359389038634 [2022-11-23 01:47:18,756 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3740 transitions. [2022-11-23 01:47:18,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3740 transitions. [2022-11-23 01:47:18,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:47:18,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3740 transitions. [2022-11-23 01:47:18,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 155.83333333333334) internal successors, (3740), 24 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:18,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 371.0) internal successors, (9275), 25 states have internal predecessors, (9275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:18,769 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 371.0) internal successors, (9275), 25 states have internal predecessors, (9275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:18,769 INFO L175 Difference]: Start difference. First operand has 275 places, 392 transitions, 5825 flow. Second operand 24 states and 3740 transitions. [2022-11-23 01:47:18,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 704 transitions, 10336 flow [2022-11-23 01:47:19,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 704 transitions, 10141 flow, removed 36 selfloop flow, removed 6 redundant places. [2022-11-23 01:47:19,875 INFO L231 Difference]: Finished difference. Result has 303 places, 456 transitions, 7220 flow [2022-11-23 01:47:19,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7220, PETRI_PLACES=303, PETRI_TRANSITIONS=456} [2022-11-23 01:47:19,876 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 255 predicate places. [2022-11-23 01:47:19,876 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 456 transitions, 7220 flow [2022-11-23 01:47:19,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 148.7741935483871) internal successors, (4612), 31 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:19,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:47:19,877 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] [2022-11-23 01:47:19,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 01:47:20,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 01:47:20,083 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:47:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:47:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash 435736046, now seen corresponding path program 2 times [2022-11-23 01:47:20,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:47:20,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454456090] [2022-11-23 01:47:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:47:20,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:47:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:47:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 01:47:20,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:47:20,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454456090] [2022-11-23 01:47:20,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454456090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:47:20,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160495653] [2022-11-23 01:47:20,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:47:20,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:47:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:47:20,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:47:20,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 01:47:20,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 01:47:20,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:47:20,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 01:47:20,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:47:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 01:47:20,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:47:20,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160495653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:47:20,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 01:47:20,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-11-23 01:47:20,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994820941] [2022-11-23 01:47:20,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:47:20,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:47:20,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:47:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:47:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 01:47:20,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-11-23 01:47:20,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 456 transitions, 7220 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) [2022-11-23 01:47:20,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:47:20,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-11-23 01:47:20,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:47:28,338 INFO L130 PetriNetUnfolder]: 10898/22439 cut-off events. [2022-11-23 01:47:28,338 INFO L131 PetriNetUnfolder]: For 151650/151744 co-relation queries the response was YES. [2022-11-23 01:47:28,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130449 conditions, 22439 events. 10898/22439 cut-off events. For 151650/151744 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 181558 event pairs, 8536 based on Foata normal form. 73/22288 useless extension candidates. Maximal degree in co-relation 130353. Up to 21107 conditions per place. [2022-11-23 01:47:28,672 INFO L137 encePairwiseOnDemand]: 369/371 looper letters, 348 selfloop transitions, 1 changer transitions 1/450 dead transitions. [2022-11-23 01:47:28,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 450 transitions, 7877 flow [2022-11-23 01:47:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:47:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:47:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-11-23 01:47:28,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47079964061096136 [2022-11-23 01:47:28,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-11-23 01:47:28,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-11-23 01:47:28,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:47:28,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-11-23 01:47:28,675 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) [2022-11-23 01:47:28,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:28,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:28,676 INFO L175 Difference]: Start difference. First operand has 303 places, 456 transitions, 7220 flow. Second operand 3 states and 524 transitions. [2022-11-23 01:47:28,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 450 transitions, 7877 flow [2022-11-23 01:47:29,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 450 transitions, 7782 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-11-23 01:47:29,804 INFO L231 Difference]: Finished difference. Result has 290 places, 449 transitions, 7081 flow [2022-11-23 01:47:29,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=7082, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7081, PETRI_PLACES=290, PETRI_TRANSITIONS=449} [2022-11-23 01:47:29,805 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 242 predicate places. [2022-11-23 01:47:29,805 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 449 transitions, 7081 flow [2022-11-23 01:47:29,805 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) [2022-11-23 01:47:29,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:47:29,805 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] [2022-11-23 01:47:29,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 01:47:30,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 01:47:30,008 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-23 01:47:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:47:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1518243944, now seen corresponding path program 1 times [2022-11-23 01:47:30,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:47:30,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734602360] [2022-11-23 01:47:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:47:30,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:47:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:47:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:47:31,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:47:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734602360] [2022-11-23 01:47:31,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734602360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:47:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237757501] [2022-11-23 01:47:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:47:31,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:47:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:47:31,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:47:31,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3703051-a11d-4198-b1a3-2b67c2543e5d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 01:47:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:47:32,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-23 01:47:32,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:47:32,610 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 [2022-11-23 01:47:33,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:47:33,165 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 [2022-11-23 01:47:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 01:47:34,317 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 46 [2022-11-23 01:47:36,364 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_arrayElimCell_24_58 Int) (aux_div_v_arrayElimCell_24_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_24_58 4294967296))) (and (= |c_t2Thread1of1ForFork1_#t~ret44#1| (mod (+ (* 4294967295 aux_mod_v_arrayElimCell_24_58) 4294967295) 4294967296)) (< 0 (+ .cse0 8589934593 aux_mod_v_arrayElimCell_24_58)) (< aux_mod_v_arrayElimCell_24_58 4294967296) (<= (+ .cse0 aux_mod_v_arrayElimCell_24_58 4294967297) 0) (<= 4294966496 aux_mod_v_arrayElimCell_24_58)))) is different from true [2022-11-23 01:47:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-23 01:47:36,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:47:38,289 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 57 treesize of output 48 [2022-11-23 01:47:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:47:38,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237757501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:47:38,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:47:38,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 19] total 63 [2022-11-23 01:47:38,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324937829] [2022-11-23 01:47:38,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:47:38,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-23 01:47:38,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:47:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-23 01:47:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=3590, Unknown=1, NotChecked=124, Total=4160 [2022-11-23 01:47:39,437 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 371 [2022-11-23 01:47:39,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 449 transitions, 7081 flow. Second operand has 65 states, 65 states have (on average 121.66153846153846) internal successors, (7908), 65 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:47:39,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:47:39,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 371 [2022-11-23 01:47:39,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand