./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 14:25:58,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:25:58,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:25:58,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:25:58,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:25:58,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:25:58,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:25:58,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:25:58,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:25:58,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:25:58,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:25:58,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:25:58,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:25:58,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:25:58,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:25:58,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:25:58,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:25:58,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:25:58,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:25:58,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:25:58,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:25:58,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:25:58,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:25:58,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:25:58,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:25:58,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:25:58,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:25:58,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:25:58,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:25:58,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:25:58,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:25:58,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:25:58,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:25:58,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:25:58,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:25:58,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:25:58,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:25:58,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:25:58,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:25:58,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:25:58,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:25:58,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:25:58,432 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:25:58,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:25:58,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:25:58,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:25:58,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:25:58,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:25:58,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:25:58,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:25:58,433 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:25:58,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:25:58,434 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:25:58,434 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:25:58,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:25:58,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:25:58,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:25:58,434 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:25:58,434 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:25:58,435 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:25:58,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:25:58,435 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:25:58,435 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:25:58,435 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:25:58,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:25:58,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:25:58,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:25:58,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:25:58,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:25:58,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:25:58,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:25:58,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:25:58,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:25:58,436 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:25:58,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:25:58,436 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:25:58,437 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_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-12-13 14:25:58,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:25:58,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:25:58,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:25:58,625 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:25:58,626 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:25:58,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-13 14:26:01,281 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:26:01,431 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:26:01,432 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-13 14:26:01,436 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/data/904745855/c1ae9d352ed445de8bf1ff4beae31af8/FLAGbad017337 [2022-12-13 14:26:01,447 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/data/904745855/c1ae9d352ed445de8bf1ff4beae31af8 [2022-12-13 14:26:01,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:26:01,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:26:01,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:26:01,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:26:01,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:26:01,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@539ab07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01, skipping insertion in model container [2022-12-13 14:26:01,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:26:01,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:26:01,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:26:01,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:26:01,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:26:01,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:26:01,646 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_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-12-13 14:26:01,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:26:01,661 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:26:01,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:26:01,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:26:01,675 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:26:01,676 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:26:01,680 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_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-12-13 14:26:01,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:26:01,696 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:26:01,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01 WrapperNode [2022-12-13 14:26:01,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:26:01,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:26:01,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:26:01,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:26:01,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,731 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-12-13 14:26:01,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:26:01,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:26:01,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:26:01,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:26:01,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,752 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:26:01,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:26:01,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:26:01,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:26:01,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (1/1) ... [2022-12-13 14:26:01,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:26:01,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:01,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:26:01,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:26:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:26:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 14:26:01,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 14:26:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 14:26:01,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 14:26:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:26:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:26:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:26:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 14:26:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 14:26:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:26:01,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:26:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:26:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:26:01,817 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:26:01,889 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:26:01,890 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:26:02,051 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:26:02,098 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:26:02,098 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 14:26:02,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:26:02 BoogieIcfgContainer [2022-12-13 14:26:02,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:26:02,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:26:02,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:26:02,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:26:02,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:26:01" (1/3) ... [2022-12-13 14:26:02,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6abb0e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:26:02, skipping insertion in model container [2022-12-13 14:26:02,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:26:01" (2/3) ... [2022-12-13 14:26:02,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6abb0e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:26:02, skipping insertion in model container [2022-12-13 14:26:02,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:26:02" (3/3) ... [2022-12-13 14:26:02,110 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-12-13 14:26:02,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:26:02,125 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 14:26:02,125 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:26:02,182 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:26:02,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 94 transitions, 204 flow [2022-12-13 14:26:02,269 INFO L130 PetriNetUnfolder]: 6/92 cut-off events. [2022-12-13 14:26:02,269 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:26:02,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 6/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2022-12-13 14:26:02,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 94 transitions, 204 flow [2022-12-13 14:26:02,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 87 transitions, 186 flow [2022-12-13 14:26:02,283 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:26:02,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 87 transitions, 186 flow [2022-12-13 14:26:02,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 87 transitions, 186 flow [2022-12-13 14:26:02,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 186 flow [2022-12-13 14:26:02,323 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-12-13 14:26:02,324 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:26:02,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2022-12-13 14:26:02,325 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2022-12-13 14:26:04,751 INFO L134 LiptonReduction]: Checked pairs total: 635 [2022-12-13 14:26:04,751 INFO L136 LiptonReduction]: Total number of compositions: 89 [2022-12-13 14:26:04,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:26:04,765 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;@6ed7137b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:26:04,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 14:26:04,766 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 14:26:04,766 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:26:04,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:04,767 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 14:26:04,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 374, now seen corresponding path program 1 times [2022-12-13 14:26:04,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:04,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872104989] [2022-12-13 14:26:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:04,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:04,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872104989] [2022-12-13 14:26:04,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872104989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:26:04,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:26:04,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 14:26:04,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989056552] [2022-12-13 14:26:04,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:26:04,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 14:26:04,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:04,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 14:26:04,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:26:04,874 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 183 [2022-12-13 14:26:04,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:04,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:04,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 183 [2022-12-13 14:26:04,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:04,930 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2022-12-13 14:26:04,930 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 14:26:04,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 518 event pairs, 42 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2022-12-13 14:26:04,933 INFO L137 encePairwiseOnDemand]: 180/183 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-12-13 14:26:04,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2022-12-13 14:26:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 14:26:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 14:26:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 188 transitions. [2022-12-13 14:26:04,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5136612021857924 [2022-12-13 14:26:04,944 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 188 transitions. [2022-12-13 14:26:04,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 188 transitions. [2022-12-13 14:26:04,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:04,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 188 transitions. [2022-12-13 14:26:04,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 94.0) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:04,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:04,955 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:04,957 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 188 transitions. [2022-12-13 14:26:04,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2022-12-13 14:26:04,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:26:04,961 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2022-12-13 14:26:04,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2022-12-13 14:26:04,966 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-12-13 14:26:04,966 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2022-12-13 14:26:04,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:04,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:04,967 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:26:04,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:26:04,967 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:04,968 INFO L85 PathProgramCache]: Analyzing trace with hash 369467, now seen corresponding path program 1 times [2022-12-13 14:26:04,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:04,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589297623] [2022-12-13 14:26:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:04,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:05,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:05,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589297623] [2022-12-13 14:26:05,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589297623] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:26:05,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:26:05,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:26:05,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476799860] [2022-12-13 14:26:05,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:26:05,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:26:05,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:05,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:26:05,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:26:05,097 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:26:05,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:05,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:26:05,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:05,133 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2022-12-13 14:26:05,133 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:26:05,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 464 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2022-12-13 14:26:05,134 INFO L137 encePairwiseOnDemand]: 180/183 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-12-13 14:26:05,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2022-12-13 14:26:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:26:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:26:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2022-12-13 14:26:05,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43897996357012753 [2022-12-13 14:26:05,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2022-12-13 14:26:05,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2022-12-13 14:26:05,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:05,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2022-12-13 14:26:05,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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) [2022-12-13 14:26:05,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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) [2022-12-13 14:26:05,139 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 241 transitions. [2022-12-13 14:26:05,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2022-12-13 14:26:05,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:26:05,139 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2022-12-13 14:26:05,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-12-13 14:26:05,140 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-12-13 14:26:05,140 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2022-12-13 14:26:05,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:05,140 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:26:05,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:26:05,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash 369466, now seen corresponding path program 1 times [2022-12-13 14:26:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:05,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396402990] [2022-12-13 14:26:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:05,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396402990] [2022-12-13 14:26:05,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396402990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:26:05,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:26:05,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:26:05,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971583186] [2022-12-13 14:26:05,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:26:05,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:26:05,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:26:05,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:26:05,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 183 [2022-12-13 14:26:05,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:05,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 183 [2022-12-13 14:26:05,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:05,283 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2022-12-13 14:26:05,283 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:26:05,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 400 event pairs, 36 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2022-12-13 14:26:05,284 INFO L137 encePairwiseOnDemand]: 180/183 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-12-13 14:26:05,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2022-12-13 14:26:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:26:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:26:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2022-12-13 14:26:05,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45719489981785066 [2022-12-13 14:26:05,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2022-12-13 14:26:05,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2022-12-13 14:26:05,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:05,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2022-12-13 14:26:05,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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) [2022-12-13 14:26:05,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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) [2022-12-13 14:26:05,289 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 251 transitions. [2022-12-13 14:26:05,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2022-12-13 14:26:05,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:26:05,290 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2022-12-13 14:26:05,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2022-12-13 14:26:05,290 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 14:26:05,291 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2022-12-13 14:26:05,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:05,291 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:26:05,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:26:05,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash 355066928, now seen corresponding path program 1 times [2022-12-13 14:26:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:05,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091880564] [2022-12-13 14:26:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:05,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:05,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091880564] [2022-12-13 14:26:05,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091880564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:26:05,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:26:05,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:26:05,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870895587] [2022-12-13 14:26:05,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:26:05,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:26:05,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:26:05,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:26:05,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 183 [2022-12-13 14:26:05,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:05,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 183 [2022-12-13 14:26:05,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:05,424 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2022-12-13 14:26:05,425 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:26:05,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 288 event pairs, 27 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2022-12-13 14:26:05,426 INFO L137 encePairwiseOnDemand]: 181/183 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-12-13 14:26:05,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2022-12-13 14:26:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:26:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:26:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2022-12-13 14:26:05,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4098360655737705 [2022-12-13 14:26:05,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2022-12-13 14:26:05,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2022-12-13 14:26:05,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:05,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2022-12-13 14:26:05,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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) [2022-12-13 14:26:05,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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) [2022-12-13 14:26:05,432 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 225 transitions. [2022-12-13 14:26:05,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2022-12-13 14:26:05,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:26:05,433 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2022-12-13 14:26:05,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2022-12-13 14:26:05,433 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 14:26:05,433 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2022-12-13 14:26:05,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:05,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:26:05,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:26:05,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:05,434 INFO L85 PathProgramCache]: Analyzing trace with hash 355066926, now seen corresponding path program 1 times [2022-12-13 14:26:05,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:05,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347757557] [2022-12-13 14:26:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:05,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:05,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:05,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347757557] [2022-12-13 14:26:05,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347757557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:26:05,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:26:05,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:26:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127401863] [2022-12-13 14:26:05,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:26:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:26:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:26:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:26:05,486 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 183 [2022-12-13 14:26:05,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:05,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 183 [2022-12-13 14:26:05,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:05,512 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2022-12-13 14:26:05,512 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:26:05,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 174 event pairs, 18 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2022-12-13 14:26:05,513 INFO L137 encePairwiseOnDemand]: 181/183 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-12-13 14:26:05,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2022-12-13 14:26:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:26:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:26:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2022-12-13 14:26:05,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4353369763205829 [2022-12-13 14:26:05,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2022-12-13 14:26:05,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2022-12-13 14:26:05,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:05,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2022-12-13 14:26:05,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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) [2022-12-13 14:26:05,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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) [2022-12-13 14:26:05,517 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 239 transitions. [2022-12-13 14:26:05,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2022-12-13 14:26:05,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:26:05,518 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2022-12-13 14:26:05,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2022-12-13 14:26:05,518 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 14:26:05,519 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2022-12-13 14:26:05,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:05,519 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:05,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:26:05,519 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2049970880, now seen corresponding path program 1 times [2022-12-13 14:26:05,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:05,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949136807] [2022-12-13 14:26:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:05,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:05,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949136807] [2022-12-13 14:26:05,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949136807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:26:05,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:26:05,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:26:05,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333787267] [2022-12-13 14:26:05,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:26:05,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:26:05,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:05,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:26:05,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:26:05,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2022-12-13 14:26:05,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:05,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2022-12-13 14:26:05,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:05,633 INFO L130 PetriNetUnfolder]: 63/112 cut-off events. [2022-12-13 14:26:05,633 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:26:05,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 112 events. 63/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 330 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 230. Up to 66 conditions per place. [2022-12-13 14:26:05,634 INFO L137 encePairwiseOnDemand]: 180/183 looper letters, 17 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2022-12-13 14:26:05,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2022-12-13 14:26:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:26:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:26:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2022-12-13 14:26:05,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4918032786885246 [2022-12-13 14:26:05,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2022-12-13 14:26:05,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2022-12-13 14:26:05,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:05,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2022-12-13 14:26:05,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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) [2022-12-13 14:26:05,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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) [2022-12-13 14:26:05,637 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 270 transitions. [2022-12-13 14:26:05,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2022-12-13 14:26:05,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:26:05,638 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 50 flow [2022-12-13 14:26:05,638 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2022-12-13 14:26:05,638 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2022-12-13 14:26:05,638 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 50 flow [2022-12-13 14:26:05,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,639 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:05,639 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:05,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:26:05,639 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:05,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:05,639 INFO L85 PathProgramCache]: Analyzing trace with hash 370877542, now seen corresponding path program 1 times [2022-12-13 14:26:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:05,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665057191] [2022-12-13 14:26:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:05,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:05,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:05,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665057191] [2022-12-13 14:26:05,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665057191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:26:05,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:26:05,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:26:05,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218696612] [2022-12-13 14:26:05,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:26:05,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:26:05,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:05,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:26:05,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:26:05,729 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 183 [2022-12-13 14:26:05,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 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) [2022-12-13 14:26:05,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:05,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 183 [2022-12-13 14:26:05,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:05,814 INFO L130 PetriNetUnfolder]: 106/200 cut-off events. [2022-12-13 14:26:05,814 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-12-13 14:26:05,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 200 events. 106/200 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 630 event pairs, 46 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 449. Up to 125 conditions per place. [2022-12-13 14:26:05,815 INFO L137 encePairwiseOnDemand]: 178/183 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2022-12-13 14:26:05,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 191 flow [2022-12-13 14:26:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:26:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:26:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 417 transitions. [2022-12-13 14:26:05,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557377049180328 [2022-12-13 14:26:05,817 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 417 transitions. [2022-12-13 14:26:05,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 417 transitions. [2022-12-13 14:26:05,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:05,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 417 transitions. [2022-12-13 14:26:05,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,820 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:05,820 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 50 flow. Second operand 5 states and 417 transitions. [2022-12-13 14:26:05,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 191 flow [2022-12-13 14:26:05,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 39 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:26:05,821 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 70 flow [2022-12-13 14:26:05,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2022-12-13 14:26:05,821 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2022-12-13 14:26:05,821 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 70 flow [2022-12-13 14:26:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 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) [2022-12-13 14:26:05,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:05,822 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:05,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 14:26:05,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash 903527320, now seen corresponding path program 2 times [2022-12-13 14:26:05,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928082812] [2022-12-13 14:26:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:05,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:05,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:05,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928082812] [2022-12-13 14:26:05,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928082812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:05,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040049565] [2022-12-13 14:26:05,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:26:05,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:05,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:05,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:05,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:26:05,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:26:05,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:05,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:26:05,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:26:05,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:26:05,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040049565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:26:05,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:26:05,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-13 14:26:05,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372016627] [2022-12-13 14:26:05,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:26:06,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:26:06,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:26:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:26:06,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 183 [2022-12-13 14:26:06,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:06,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 183 [2022-12-13 14:26:06,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:06,064 INFO L130 PetriNetUnfolder]: 73/134 cut-off events. [2022-12-13 14:26:06,064 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2022-12-13 14:26:06,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 134 events. 73/134 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 408 event pairs, 37 based on Foata normal form. 12/134 useless extension candidates. Maximal degree in co-relation 369. Up to 105 conditions per place. [2022-12-13 14:26:06,065 INFO L137 encePairwiseOnDemand]: 179/183 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2022-12-13 14:26:06,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 23 transitions, 127 flow [2022-12-13 14:26:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:26:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:26:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2022-12-13 14:26:06,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603825136612022 [2022-12-13 14:26:06,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2022-12-13 14:26:06,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2022-12-13 14:26:06,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:06,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2022-12-13 14:26:06,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,068 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,068 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 70 flow. Second operand 4 states and 337 transitions. [2022-12-13 14:26:06,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 23 transitions, 127 flow [2022-12-13 14:26:06,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 117 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 14:26:06,069 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 62 flow [2022-12-13 14:26:06,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2022-12-13 14:26:06,070 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2022-12-13 14:26:06,070 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 62 flow [2022-12-13 14:26:06,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:06,070 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:06,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:26:06,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:06,272 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1146626595, now seen corresponding path program 1 times [2022-12-13 14:26:06,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:06,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645926666] [2022-12-13 14:26:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:06,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:06,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:06,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645926666] [2022-12-13 14:26:06,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645926666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:06,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977905689] [2022-12-13 14:26:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:06,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:06,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:06,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:06,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:26:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 14:26:06,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:06,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:06,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977905689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:06,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:06,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2022-12-13 14:26:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275361690] [2022-12-13 14:26:06,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:06,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:26:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:26:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:26:06,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2022-12-13 14:26:06,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 17 transitions, 62 flow. Second operand has 6 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:06,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2022-12-13 14:26:06,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:06,794 INFO L130 PetriNetUnfolder]: 101/189 cut-off events. [2022-12-13 14:26:06,794 INFO L131 PetriNetUnfolder]: For 51/65 co-relation queries the response was YES. [2022-12-13 14:26:06,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 189 events. 101/189 cut-off events. For 51/65 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 659 event pairs, 23 based on Foata normal form. 15/178 useless extension candidates. Maximal degree in co-relation 488. Up to 82 conditions per place. [2022-12-13 14:26:06,796 INFO L137 encePairwiseOnDemand]: 179/183 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2022-12-13 14:26:06,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 208 flow [2022-12-13 14:26:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:26:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:26:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 363 transitions. [2022-12-13 14:26:06,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4959016393442623 [2022-12-13 14:26:06,798 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 363 transitions. [2022-12-13 14:26:06,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 363 transitions. [2022-12-13 14:26:06,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:06,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 363 transitions. [2022-12-13 14:26:06,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,801 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,801 INFO L175 Difference]: Start difference. First operand has 28 places, 17 transitions, 62 flow. Second operand 4 states and 363 transitions. [2022-12-13 14:26:06,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 208 flow [2022-12-13 14:26:06,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 14:26:06,803 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 100 flow [2022-12-13 14:26:06,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2022-12-13 14:26:06,803 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2022-12-13 14:26:06,803 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 100 flow [2022-12-13 14:26:06,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:06,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:06,804 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:06,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:26:07,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:07,005 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1461047253, now seen corresponding path program 2 times [2022-12-13 14:26:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:07,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611209813] [2022-12-13 14:26:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:07,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:26:07,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:07,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611209813] [2022-12-13 14:26:07,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611209813] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:07,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718904170] [2022-12-13 14:26:07,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:26:07,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:07,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:07,142 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:07,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:26:07,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:26:07,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:26:07,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:26:07,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:26:07,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718904170] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:07,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:07,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 14:26:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267158750] [2022-12-13 14:26:07,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:07,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 14:26:07,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:07,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 14:26:07,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:26:07,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 183 [2022-12-13 14:26:07,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 100 flow. Second operand has 11 states, 11 states have (on average 79.72727272727273) internal successors, (877), 11 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:07,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:07,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 183 [2022-12-13 14:26:07,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:07,537 INFO L130 PetriNetUnfolder]: 149/270 cut-off events. [2022-12-13 14:26:07,537 INFO L131 PetriNetUnfolder]: For 237/237 co-relation queries the response was YES. [2022-12-13 14:26:07,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832 conditions, 270 events. 149/270 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 922 event pairs, 35 based on Foata normal form. 18/288 useless extension candidates. Maximal degree in co-relation 824. Up to 190 conditions per place. [2022-12-13 14:26:07,538 INFO L137 encePairwiseOnDemand]: 178/183 looper letters, 30 selfloop transitions, 8 changer transitions 6/45 dead transitions. [2022-12-13 14:26:07,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 279 flow [2022-12-13 14:26:07,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:26:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:26:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2022-12-13 14:26:07,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4601092896174863 [2022-12-13 14:26:07,540 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2022-12-13 14:26:07,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2022-12-13 14:26:07,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:07,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2022-12-13 14:26:07,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:07,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:07,544 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:07,544 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 100 flow. Second operand 5 states and 421 transitions. [2022-12-13 14:26:07,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 279 flow [2022-12-13 14:26:07,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 277 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 14:26:07,546 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 174 flow [2022-12-13 14:26:07,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2022-12-13 14:26:07,547 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2022-12-13 14:26:07,547 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 174 flow [2022-12-13 14:26:07,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 79.72727272727273) internal successors, (877), 11 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:07,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:07,547 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:07,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:26:07,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 14:26:07,748 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:07,748 INFO L85 PathProgramCache]: Analyzing trace with hash 384588883, now seen corresponding path program 3 times [2022-12-13 14:26:07,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:07,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246179568] [2022-12-13 14:26:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:07,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:07,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:07,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246179568] [2022-12-13 14:26:07,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246179568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:07,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62612611] [2022-12-13 14:26:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:26:07,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:07,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:07,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:07,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:26:08,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 14:26:08,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:26:08,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:08,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:08,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62612611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:08,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:08,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 14:26:08,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883901059] [2022-12-13 14:26:08,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:08,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:26:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:26:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:26:08,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:08,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 174 flow. Second operand has 16 states, 16 states have (on average 75.4375) internal successors, (1207), 16 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:08,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:08,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:08,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:08,723 INFO L130 PetriNetUnfolder]: 216/388 cut-off events. [2022-12-13 14:26:08,723 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2022-12-13 14:26:08,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 388 events. 216/388 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1461 event pairs, 4 based on Foata normal form. 20/408 useless extension candidates. Maximal degree in co-relation 1408. Up to 135 conditions per place. [2022-12-13 14:26:08,727 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 64 selfloop transitions, 29 changer transitions 10/103 dead transitions. [2022-12-13 14:26:08,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 103 transitions, 673 flow [2022-12-13 14:26:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 14:26:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 14:26:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1267 transitions. [2022-12-13 14:26:08,730 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4327185792349727 [2022-12-13 14:26:08,730 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1267 transitions. [2022-12-13 14:26:08,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1267 transitions. [2022-12-13 14:26:08,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:08,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1267 transitions. [2022-12-13 14:26:08,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 79.1875) internal successors, (1267), 16 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:08,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 183.0) internal successors, (3111), 17 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:08,735 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 183.0) internal successors, (3111), 17 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:08,735 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 174 flow. Second operand 16 states and 1267 transitions. [2022-12-13 14:26:08,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 103 transitions, 673 flow [2022-12-13 14:26:08,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 103 transitions, 640 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-12-13 14:26:08,738 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 377 flow [2022-12-13 14:26:08,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=377, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2022-12-13 14:26:08,739 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2022-12-13 14:26:08,739 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 377 flow [2022-12-13 14:26:08,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.4375) internal successors, (1207), 16 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:08,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:08,739 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:08,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 14:26:08,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:08,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1574669734, now seen corresponding path program 4 times [2022-12-13 14:26:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:08,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689759141] [2022-12-13 14:26:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:08,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:09,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689759141] [2022-12-13 14:26:09,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689759141] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993369753] [2022-12-13 14:26:09,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:26:09,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:09,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:09,066 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:09,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:26:09,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:26:09,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:26:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:09,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:09,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993369753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:09,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:09,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2022-12-13 14:26:09,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546714506] [2022-12-13 14:26:09,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:09,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:26:09,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:26:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:26:09,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2022-12-13 14:26:09,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 377 flow. Second operand has 9 states, 9 states have (on average 85.0) internal successors, (765), 9 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:09,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:09,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2022-12-13 14:26:09,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:09,492 INFO L130 PetriNetUnfolder]: 294/534 cut-off events. [2022-12-13 14:26:09,492 INFO L131 PetriNetUnfolder]: For 2584/2627 co-relation queries the response was YES. [2022-12-13 14:26:09,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2597 conditions, 534 events. 294/534 cut-off events. For 2584/2627 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2331 event pairs, 38 based on Foata normal form. 36/563 useless extension candidates. Maximal degree in co-relation 2577. Up to 207 conditions per place. [2022-12-13 14:26:09,497 INFO L137 encePairwiseOnDemand]: 179/183 looper letters, 48 selfloop transitions, 24 changer transitions 4/82 dead transitions. [2022-12-13 14:26:09,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 82 transitions, 776 flow [2022-12-13 14:26:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:26:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:26:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 456 transitions. [2022-12-13 14:26:09,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49836065573770494 [2022-12-13 14:26:09,499 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 456 transitions. [2022-12-13 14:26:09,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 456 transitions. [2022-12-13 14:26:09,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:09,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 456 transitions. [2022-12-13 14:26:09,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:09,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:09,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:09,502 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 377 flow. Second operand 5 states and 456 transitions. [2022-12-13 14:26:09,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 82 transitions, 776 flow [2022-12-13 14:26:09,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 686 flow, removed 36 selfloop flow, removed 5 redundant places. [2022-12-13 14:26:09,512 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 527 flow [2022-12-13 14:26:09,512 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=527, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2022-12-13 14:26:09,513 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2022-12-13 14:26:09,513 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 527 flow [2022-12-13 14:26:09,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.0) internal successors, (765), 9 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:09,513 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:09,513 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:09,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:26:09,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:09,714 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:09,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:09,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1399408493, now seen corresponding path program 5 times [2022-12-13 14:26:09,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:09,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670988073] [2022-12-13 14:26:09,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:09,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:09,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:09,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670988073] [2022-12-13 14:26:09,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670988073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:09,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724062723] [2022-12-13 14:26:09,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:26:09,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:09,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:09,820 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:09,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:26:09,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:26:09,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:09,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:26:09,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:09,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:10,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724062723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:10,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:10,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 14:26:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952128925] [2022-12-13 14:26:10,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:10,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:26:10,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:10,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:26:10,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:26:10,080 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:10,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 527 flow. Second operand has 17 states, 17 states have (on average 75.3529411764706) internal successors, (1281), 17 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:10,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:10,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:10,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:10,487 INFO L130 PetriNetUnfolder]: 458/825 cut-off events. [2022-12-13 14:26:10,487 INFO L131 PetriNetUnfolder]: For 4449/4449 co-relation queries the response was YES. [2022-12-13 14:26:10,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4120 conditions, 825 events. 458/825 cut-off events. For 4449/4449 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3964 event pairs, 1 based on Foata normal form. 54/879 useless extension candidates. Maximal degree in co-relation 4098. Up to 334 conditions per place. [2022-12-13 14:26:10,491 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 75 selfloop transitions, 68 changer transitions 2/145 dead transitions. [2022-12-13 14:26:10,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 145 transitions, 1469 flow [2022-12-13 14:26:10,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 14:26:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 14:26:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1337 transitions. [2022-12-13 14:26:10,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4297653487624558 [2022-12-13 14:26:10,494 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1337 transitions. [2022-12-13 14:26:10,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1337 transitions. [2022-12-13 14:26:10,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:10,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1337 transitions. [2022-12-13 14:26:10,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 78.6470588235294) internal successors, (1337), 17 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:10,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 183.0) internal successors, (3294), 18 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:10,499 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 183.0) internal successors, (3294), 18 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:10,499 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 527 flow. Second operand 17 states and 1337 transitions. [2022-12-13 14:26:10,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 145 transitions, 1469 flow [2022-12-13 14:26:10,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 145 transitions, 1443 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-12-13 14:26:10,509 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 1170 flow [2022-12-13 14:26:10,509 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1170, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2022-12-13 14:26:10,509 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2022-12-13 14:26:10,509 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 1170 flow [2022-12-13 14:26:10,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.3529411764706) internal successors, (1281), 17 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:10,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:10,510 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:10,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:26:10,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 14:26:10,710 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1740750153, now seen corresponding path program 6 times [2022-12-13 14:26:10,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:10,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671963880] [2022-12-13 14:26:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:10,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:10,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:10,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671963880] [2022-12-13 14:26:10,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671963880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:10,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530381868] [2022-12-13 14:26:10,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:26:10,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:10,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:10,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:26:10,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:26:10,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:10,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:26:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:10,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:10,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530381868] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:10,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:10,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 14:26:10,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485197889] [2022-12-13 14:26:10,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:26:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:26:10,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:26:11,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:11,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 1170 flow. Second operand has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:11,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:11,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:11,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:11,726 INFO L130 PetriNetUnfolder]: 687/1287 cut-off events. [2022-12-13 14:26:11,726 INFO L131 PetriNetUnfolder]: For 18483/18483 co-relation queries the response was YES. [2022-12-13 14:26:11,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8659 conditions, 1287 events. 687/1287 cut-off events. For 18483/18483 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7139 event pairs, 4 based on Foata normal form. 24/1311 useless extension candidates. Maximal degree in co-relation 8628. Up to 463 conditions per place. [2022-12-13 14:26:11,738 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 106 selfloop transitions, 138 changer transitions 16/260 dead transitions. [2022-12-13 14:26:11,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 260 transitions, 3634 flow [2022-12-13 14:26:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 14:26:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 14:26:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1950 transitions. [2022-12-13 14:26:11,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4262295081967213 [2022-12-13 14:26:11,743 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1950 transitions. [2022-12-13 14:26:11,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1950 transitions. [2022-12-13 14:26:11,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:11,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1950 transitions. [2022-12-13 14:26:11,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 78.0) internal successors, (1950), 25 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:11,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 183.0) internal successors, (4758), 26 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:11,756 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 183.0) internal successors, (4758), 26 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:11,756 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 1170 flow. Second operand 25 states and 1950 transitions. [2022-12-13 14:26:11,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 260 transitions, 3634 flow [2022-12-13 14:26:11,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 260 transitions, 3407 flow, removed 107 selfloop flow, removed 3 redundant places. [2022-12-13 14:26:11,805 INFO L231 Difference]: Finished difference. Result has 114 places, 172 transitions, 2605 flow [2022-12-13 14:26:11,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2605, PETRI_PLACES=114, PETRI_TRANSITIONS=172} [2022-12-13 14:26:11,806 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 85 predicate places. [2022-12-13 14:26:11,806 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 172 transitions, 2605 flow [2022-12-13 14:26:11,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:11,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:11,807 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:11,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:26:12,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 14:26:12,008 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1739560861, now seen corresponding path program 7 times [2022-12-13 14:26:12,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:12,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876172929] [2022-12-13 14:26:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:12,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:12,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:12,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876172929] [2022-12-13 14:26:12,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876172929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:12,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700242212] [2022-12-13 14:26:12,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:26:12,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:12,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:12,150 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:12,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:26:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:12,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:26:12,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:12,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:12,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700242212] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:12,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:12,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 14:26:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268751983] [2022-12-13 14:26:12,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:12,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:26:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:12,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:26:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:26:12,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:12,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 172 transitions, 2605 flow. Second operand has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:12,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:12,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:12,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:12,948 INFO L130 PetriNetUnfolder]: 599/1177 cut-off events. [2022-12-13 14:26:12,949 INFO L131 PetriNetUnfolder]: For 29971/29971 co-relation queries the response was YES. [2022-12-13 14:26:12,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8981 conditions, 1177 events. 599/1177 cut-off events. For 29971/29971 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6783 event pairs, 37 based on Foata normal form. 56/1233 useless extension candidates. Maximal degree in co-relation 8943. Up to 334 conditions per place. [2022-12-13 14:26:12,958 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 101 selfloop transitions, 131 changer transitions 10/242 dead transitions. [2022-12-13 14:26:12,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 242 transitions, 3597 flow [2022-12-13 14:26:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 14:26:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 14:26:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1724 transitions. [2022-12-13 14:26:12,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42821659215101837 [2022-12-13 14:26:12,960 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1724 transitions. [2022-12-13 14:26:12,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1724 transitions. [2022-12-13 14:26:12,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:12,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1724 transitions. [2022-12-13 14:26:12,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.36363636363636) internal successors, (1724), 22 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:12,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 183.0) internal successors, (4209), 23 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:12,966 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 183.0) internal successors, (4209), 23 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:12,966 INFO L175 Difference]: Start difference. First operand has 114 places, 172 transitions, 2605 flow. Second operand 22 states and 1724 transitions. [2022-12-13 14:26:12,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 242 transitions, 3597 flow [2022-12-13 14:26:13,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 242 transitions, 3171 flow, removed 203 selfloop flow, removed 6 redundant places. [2022-12-13 14:26:13,036 INFO L231 Difference]: Finished difference. Result has 131 places, 169 transitions, 2541 flow [2022-12-13 14:26:13,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2541, PETRI_PLACES=131, PETRI_TRANSITIONS=169} [2022-12-13 14:26:13,036 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 102 predicate places. [2022-12-13 14:26:13,036 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 169 transitions, 2541 flow [2022-12-13 14:26:13,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:13,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:13,037 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:13,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 14:26:13,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 14:26:13,238 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash 509039451, now seen corresponding path program 8 times [2022-12-13 14:26:13,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:13,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105020339] [2022-12-13 14:26:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:13,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105020339] [2022-12-13 14:26:13,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105020339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:13,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537072793] [2022-12-13 14:26:13,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:26:13,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:13,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:13,447 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:13,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 14:26:13,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:26:13,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:13,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:26:13,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:13,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:13,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537072793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:13,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:13,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 14:26:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115242061] [2022-12-13 14:26:13,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:13,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 14:26:13,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 14:26:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-12-13 14:26:13,750 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:13,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 169 transitions, 2541 flow. Second operand has 18 states, 18 states have (on average 75.38888888888889) internal successors, (1357), 18 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:13,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:13,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:13,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:14,393 INFO L130 PetriNetUnfolder]: 764/1554 cut-off events. [2022-12-13 14:26:14,393 INFO L131 PetriNetUnfolder]: For 49273/49273 co-relation queries the response was YES. [2022-12-13 14:26:14,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11482 conditions, 1554 events. 764/1554 cut-off events. For 49273/49273 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9734 event pairs, 119 based on Foata normal form. 96/1650 useless extension candidates. Maximal degree in co-relation 11444. Up to 969 conditions per place. [2022-12-13 14:26:14,408 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 190 selfloop transitions, 87 changer transitions 8/285 dead transitions. [2022-12-13 14:26:14,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 285 transitions, 4400 flow [2022-12-13 14:26:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:26:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 14:26:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1575 transitions. [2022-12-13 14:26:14,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.430327868852459 [2022-12-13 14:26:14,410 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1575 transitions. [2022-12-13 14:26:14,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1575 transitions. [2022-12-13 14:26:14,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:14,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1575 transitions. [2022-12-13 14:26:14,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 78.75) internal successors, (1575), 20 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:14,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 183.0) internal successors, (3843), 21 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:14,421 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 183.0) internal successors, (3843), 21 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:14,422 INFO L175 Difference]: Start difference. First operand has 131 places, 169 transitions, 2541 flow. Second operand 20 states and 1575 transitions. [2022-12-13 14:26:14,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 285 transitions, 4400 flow [2022-12-13 14:26:14,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 285 transitions, 4292 flow, removed 12 selfloop flow, removed 11 redundant places. [2022-12-13 14:26:14,501 INFO L231 Difference]: Finished difference. Result has 145 places, 211 transitions, 3492 flow [2022-12-13 14:26:14,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3492, PETRI_PLACES=145, PETRI_TRANSITIONS=211} [2022-12-13 14:26:14,502 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 116 predicate places. [2022-12-13 14:26:14,502 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 211 transitions, 3492 flow [2022-12-13 14:26:14,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.38888888888889) internal successors, (1357), 18 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:14,503 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:14,503 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:14,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 14:26:14,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 14:26:14,704 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -331898879, now seen corresponding path program 9 times [2022-12-13 14:26:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:14,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700494295] [2022-12-13 14:26:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:14,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:14,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:14,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700494295] [2022-12-13 14:26:14,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700494295] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:14,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711513715] [2022-12-13 14:26:14,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:26:14,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:14,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:14,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:14,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 14:26:14,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:26:14,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:14,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:26:14,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:14,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:15,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711513715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:15,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:15,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-12-13 14:26:15,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812964164] [2022-12-13 14:26:15,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:15,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:26:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:26:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:26:15,082 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:15,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 211 transitions, 3492 flow. Second operand has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:15,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:15,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:15,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:15,681 INFO L130 PetriNetUnfolder]: 756/1536 cut-off events. [2022-12-13 14:26:15,681 INFO L131 PetriNetUnfolder]: For 49787/49787 co-relation queries the response was YES. [2022-12-13 14:26:15,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12831 conditions, 1536 events. 756/1536 cut-off events. For 49787/49787 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9665 event pairs, 19 based on Foata normal form. 8/1544 useless extension candidates. Maximal degree in co-relation 12787. Up to 468 conditions per place. [2022-12-13 14:26:15,691 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 154 selfloop transitions, 120 changer transitions 9/283 dead transitions. [2022-12-13 14:26:15,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 283 transitions, 4967 flow [2022-12-13 14:26:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:26:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 14:26:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1555 transitions. [2022-12-13 14:26:15,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4248633879781421 [2022-12-13 14:26:15,693 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1555 transitions. [2022-12-13 14:26:15,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1555 transitions. [2022-12-13 14:26:15,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:15,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1555 transitions. [2022-12-13 14:26:15,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 77.75) internal successors, (1555), 20 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:15,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 183.0) internal successors, (3843), 21 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:15,698 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 183.0) internal successors, (3843), 21 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:15,698 INFO L175 Difference]: Start difference. First operand has 145 places, 211 transitions, 3492 flow. Second operand 20 states and 1555 transitions. [2022-12-13 14:26:15,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 283 transitions, 4967 flow [2022-12-13 14:26:15,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 283 transitions, 4649 flow, removed 132 selfloop flow, removed 9 redundant places. [2022-12-13 14:26:15,785 INFO L231 Difference]: Finished difference. Result has 159 places, 225 transitions, 3808 flow [2022-12-13 14:26:15,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3808, PETRI_PLACES=159, PETRI_TRANSITIONS=225} [2022-12-13 14:26:15,785 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2022-12-13 14:26:15,785 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 225 transitions, 3808 flow [2022-12-13 14:26:15,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:15,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:15,786 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:15,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 14:26:15,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 14:26:15,987 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:15,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2001962180, now seen corresponding path program 10 times [2022-12-13 14:26:15,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:15,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952061834] [2022-12-13 14:26:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:15,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:26:16,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952061834] [2022-12-13 14:26:16,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952061834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707823542] [2022-12-13 14:26:16,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:26:16,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:16,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:16,070 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:16,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 14:26:16,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:26:16,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 14:26:16,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:26:16,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:16,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707823542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:16,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:16,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 8] total 16 [2022-12-13 14:26:16,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947876302] [2022-12-13 14:26:16,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:16,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:26:16,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:16,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:26:16,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:26:16,448 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:16,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 225 transitions, 3808 flow. Second operand has 17 states, 17 states have (on average 75.23529411764706) internal successors, (1279), 17 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:16,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:16,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:16,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:18,022 INFO L130 PetriNetUnfolder]: 1503/2969 cut-off events. [2022-12-13 14:26:18,022 INFO L131 PetriNetUnfolder]: For 159095/159095 co-relation queries the response was YES. [2022-12-13 14:26:18,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26550 conditions, 2969 events. 1503/2969 cut-off events. For 159095/159095 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20697 event pairs, 101 based on Foata normal form. 112/3081 useless extension candidates. Maximal degree in co-relation 26503. Up to 673 conditions per place. [2022-12-13 14:26:18,055 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 265 selfloop transitions, 313 changer transitions 74/652 dead transitions. [2022-12-13 14:26:18,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 652 transitions, 11467 flow [2022-12-13 14:26:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 14:26:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-13 14:26:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3689 transitions. [2022-12-13 14:26:18,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4289036158586211 [2022-12-13 14:26:18,070 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3689 transitions. [2022-12-13 14:26:18,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3689 transitions. [2022-12-13 14:26:18,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:18,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3689 transitions. [2022-12-13 14:26:18,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 78.48936170212765) internal successors, (3689), 47 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:18,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 183.0) internal successors, (8784), 48 states have internal predecessors, (8784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:18,078 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 183.0) internal successors, (8784), 48 states have internal predecessors, (8784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:18,078 INFO L175 Difference]: Start difference. First operand has 159 places, 225 transitions, 3808 flow. Second operand 47 states and 3689 transitions. [2022-12-13 14:26:18,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 652 transitions, 11467 flow [2022-12-13 14:26:18,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 652 transitions, 11048 flow, removed 172 selfloop flow, removed 6 redundant places. [2022-12-13 14:26:18,275 INFO L231 Difference]: Finished difference. Result has 229 places, 443 transitions, 8752 flow [2022-12-13 14:26:18,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=3627, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=8752, PETRI_PLACES=229, PETRI_TRANSITIONS=443} [2022-12-13 14:26:18,276 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 200 predicate places. [2022-12-13 14:26:18,276 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 443 transitions, 8752 flow [2022-12-13 14:26:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.23529411764706) internal successors, (1279), 17 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:18,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:18,276 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:18,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 14:26:18,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 14:26:18,477 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1220352904, now seen corresponding path program 11 times [2022-12-13 14:26:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:18,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001521798] [2022-12-13 14:26:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:18,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:18,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001521798] [2022-12-13 14:26:18,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001521798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:18,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663224172] [2022-12-13 14:26:18,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:26:18,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:18,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:18,622 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:18,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 14:26:18,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 14:26:18,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:18,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:26:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:18,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:18,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663224172] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:18,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:18,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-13 14:26:18,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694176934] [2022-12-13 14:26:18,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:18,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:26:18,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:26:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:26:18,983 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:18,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 443 transitions, 8752 flow. Second operand has 21 states, 21 states have (on average 75.0952380952381) internal successors, (1577), 21 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:18,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:18,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:18,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:20,200 INFO L130 PetriNetUnfolder]: 1732/3332 cut-off events. [2022-12-13 14:26:20,201 INFO L131 PetriNetUnfolder]: For 438344/438344 co-relation queries the response was YES. [2022-12-13 14:26:20,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39713 conditions, 3332 events. 1732/3332 cut-off events. For 438344/438344 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 23098 event pairs, 74 based on Foata normal form. 56/3388 useless extension candidates. Maximal degree in co-relation 39635. Up to 992 conditions per place. [2022-12-13 14:26:20,231 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 257 selfloop transitions, 397 changer transitions 29/683 dead transitions. [2022-12-13 14:26:20,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 683 transitions, 14102 flow [2022-12-13 14:26:20,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:26:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 14:26:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1895 transitions. [2022-12-13 14:26:20,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4314663023679417 [2022-12-13 14:26:20,233 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1895 transitions. [2022-12-13 14:26:20,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1895 transitions. [2022-12-13 14:26:20,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:20,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1895 transitions. [2022-12-13 14:26:20,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 78.95833333333333) internal successors, (1895), 24 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:20,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 183.0) internal successors, (4575), 25 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:20,238 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 183.0) internal successors, (4575), 25 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:20,238 INFO L175 Difference]: Start difference. First operand has 229 places, 443 transitions, 8752 flow. Second operand 24 states and 1895 transitions. [2022-12-13 14:26:20,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 683 transitions, 14102 flow [2022-12-13 14:26:20,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 683 transitions, 12745 flow, removed 609 selfloop flow, removed 13 redundant places. [2022-12-13 14:26:20,975 INFO L231 Difference]: Finished difference. Result has 237 places, 521 transitions, 10798 flow [2022-12-13 14:26:20,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=7955, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10798, PETRI_PLACES=237, PETRI_TRANSITIONS=521} [2022-12-13 14:26:20,975 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 208 predicate places. [2022-12-13 14:26:20,975 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 521 transitions, 10798 flow [2022-12-13 14:26:20,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.0952380952381) internal successors, (1577), 21 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:20,976 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:20,976 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:20,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 14:26:21,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:21,177 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:21,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1031895229, now seen corresponding path program 12 times [2022-12-13 14:26:21,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:21,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566429018] [2022-12-13 14:26:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:21,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:21,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566429018] [2022-12-13 14:26:21,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566429018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:21,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847465031] [2022-12-13 14:26:21,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:26:21,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:21,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:21,292 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:21,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 14:26:21,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:26:21,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 14:26:21,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:21,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:21,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847465031] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:21,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:21,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 10] total 21 [2022-12-13 14:26:21,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113013104] [2022-12-13 14:26:21,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:21,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 14:26:21,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:21,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 14:26:21,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:26:21,866 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:26:21,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 521 transitions, 10798 flow. Second operand has 23 states, 23 states have (on average 76.08695652173913) internal successors, (1750), 23 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:21,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:21,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:26:21,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:25,840 INFO L130 PetriNetUnfolder]: 4523/8630 cut-off events. [2022-12-13 14:26:25,840 INFO L131 PetriNetUnfolder]: For 954530/954530 co-relation queries the response was YES. [2022-12-13 14:26:25,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101513 conditions, 8630 events. 4523/8630 cut-off events. For 954530/954530 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 69483 event pairs, 467 based on Foata normal form. 8/8638 useless extension candidates. Maximal degree in co-relation 101434. Up to 2069 conditions per place. [2022-12-13 14:26:25,945 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 915 selfloop transitions, 696 changer transitions 48/1659 dead transitions. [2022-12-13 14:26:25,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1659 transitions, 35159 flow [2022-12-13 14:26:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 14:26:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 14:26:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2864 transitions. [2022-12-13 14:26:25,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44715066354410615 [2022-12-13 14:26:25,948 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2864 transitions. [2022-12-13 14:26:25,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2864 transitions. [2022-12-13 14:26:25,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:25,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2864 transitions. [2022-12-13 14:26:25,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 81.82857142857142) internal successors, (2864), 35 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:25,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 183.0) internal successors, (6588), 36 states have internal predecessors, (6588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:25,955 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 183.0) internal successors, (6588), 36 states have internal predecessors, (6588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:25,955 INFO L175 Difference]: Start difference. First operand has 237 places, 521 transitions, 10798 flow. Second operand 35 states and 2864 transitions. [2022-12-13 14:26:25,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1659 transitions, 35159 flow [2022-12-13 14:26:28,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 1659 transitions, 33588 flow, removed 714 selfloop flow, removed 9 redundant places. [2022-12-13 14:26:28,495 INFO L231 Difference]: Finished difference. Result has 277 places, 1006 transitions, 23588 flow [2022-12-13 14:26:28,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=10321, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=23588, PETRI_PLACES=277, PETRI_TRANSITIONS=1006} [2022-12-13 14:26:28,496 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2022-12-13 14:26:28,496 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1006 transitions, 23588 flow [2022-12-13 14:26:28,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 76.08695652173913) internal successors, (1750), 23 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:28,496 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:28,496 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:28,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 14:26:28,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:28,697 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:28,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:28,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1833746964, now seen corresponding path program 13 times [2022-12-13 14:26:28,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:28,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507153594] [2022-12-13 14:26:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:28,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:28,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507153594] [2022-12-13 14:26:28,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507153594] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599496375] [2022-12-13 14:26:28,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:26:28,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:28,806 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:28,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 14:26:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:28,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:26:28,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:28,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:29,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599496375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:29,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:29,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-13 14:26:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762921160] [2022-12-13 14:26:29,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:29,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:26:29,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:29,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:26:29,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:26:29,167 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:29,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1006 transitions, 23588 flow. Second operand has 22 states, 22 states have (on average 74.9090909090909) internal successors, (1648), 22 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:29,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:29,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:29,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:33,511 INFO L130 PetriNetUnfolder]: 5150/9837 cut-off events. [2022-12-13 14:26:33,512 INFO L131 PetriNetUnfolder]: For 1413892/1413892 co-relation queries the response was YES. [2022-12-13 14:26:33,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119071 conditions, 9837 events. 5150/9837 cut-off events. For 1413892/1413892 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 81284 event pairs, 173 based on Foata normal form. 326/10163 useless extension candidates. Maximal degree in co-relation 118978. Up to 2871 conditions per place. [2022-12-13 14:26:33,637 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 343 selfloop transitions, 975 changer transitions 18/1336 dead transitions. [2022-12-13 14:26:33,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 1336 transitions, 32355 flow [2022-12-13 14:26:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:26:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 14:26:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2279 transitions. [2022-12-13 14:26:33,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42943282457132087 [2022-12-13 14:26:33,640 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2279 transitions. [2022-12-13 14:26:33,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2279 transitions. [2022-12-13 14:26:33,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:33,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2279 transitions. [2022-12-13 14:26:33,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 78.58620689655173) internal successors, (2279), 29 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:33,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 183.0) internal successors, (5490), 30 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:33,648 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 183.0) internal successors, (5490), 30 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:33,648 INFO L175 Difference]: Start difference. First operand has 277 places, 1006 transitions, 23588 flow. Second operand 29 states and 2279 transitions. [2022-12-13 14:26:33,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 1336 transitions, 32355 flow [2022-12-13 14:26:37,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1336 transitions, 31003 flow, removed 676 selfloop flow, removed 0 redundant places. [2022-12-13 14:26:37,269 INFO L231 Difference]: Finished difference. Result has 313 places, 1161 transitions, 28867 flow [2022-12-13 14:26:37,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=22490, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=813, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=28867, PETRI_PLACES=313, PETRI_TRANSITIONS=1161} [2022-12-13 14:26:37,270 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 284 predicate places. [2022-12-13 14:26:37,270 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 1161 transitions, 28867 flow [2022-12-13 14:26:37,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 74.9090909090909) internal successors, (1648), 22 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:37,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:37,270 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:37,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 14:26:37,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 14:26:37,471 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash 826496774, now seen corresponding path program 14 times [2022-12-13 14:26:37,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:37,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943848190] [2022-12-13 14:26:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:37,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:37,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:37,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943848190] [2022-12-13 14:26:37,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943848190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:37,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413131292] [2022-12-13 14:26:37,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:26:37,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:37,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:37,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 14:26:37,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:26:37,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:26:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:37,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:37,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413131292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:37,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:37,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-13 14:26:37,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88027072] [2022-12-13 14:26:37,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:37,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 14:26:37,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:37,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 14:26:37,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:26:38,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:38,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 1161 transitions, 28867 flow. Second operand has 23 states, 23 states have (on average 75.1304347826087) internal successors, (1728), 23 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:38,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:38,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:38,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:26:44,492 INFO L130 PetriNetUnfolder]: 6498/12285 cut-off events. [2022-12-13 14:26:44,493 INFO L131 PetriNetUnfolder]: For 1688361/1688361 co-relation queries the response was YES. [2022-12-13 14:26:44,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151598 conditions, 12285 events. 6498/12285 cut-off events. For 1688361/1688361 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 104779 event pairs, 231 based on Foata normal form. 166/12451 useless extension candidates. Maximal degree in co-relation 151496. Up to 5615 conditions per place. [2022-12-13 14:26:44,622 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 551 selfloop transitions, 1105 changer transitions 15/1671 dead transitions. [2022-12-13 14:26:44,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1671 transitions, 43157 flow [2022-12-13 14:26:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 14:26:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 14:26:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2203 transitions. [2022-12-13 14:26:44,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4299375487900078 [2022-12-13 14:26:44,624 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2203 transitions. [2022-12-13 14:26:44,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2203 transitions. [2022-12-13 14:26:44,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:26:44,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2203 transitions. [2022-12-13 14:26:44,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 78.67857142857143) internal successors, (2203), 28 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:44,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 183.0) internal successors, (5307), 29 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:44,669 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 183.0) internal successors, (5307), 29 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:44,669 INFO L175 Difference]: Start difference. First operand has 313 places, 1161 transitions, 28867 flow. Second operand 28 states and 2203 transitions. [2022-12-13 14:26:44,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1671 transitions, 43157 flow [2022-12-13 14:26:51,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1671 transitions, 40531 flow, removed 390 selfloop flow, removed 14 redundant places. [2022-12-13 14:26:51,082 INFO L231 Difference]: Finished difference. Result has 339 places, 1494 transitions, 39012 flow [2022-12-13 14:26:51,083 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=26910, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=789, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=39012, PETRI_PLACES=339, PETRI_TRANSITIONS=1494} [2022-12-13 14:26:51,083 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 310 predicate places. [2022-12-13 14:26:51,083 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 1494 transitions, 39012 flow [2022-12-13 14:26:51,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.1304347826087) internal successors, (1728), 23 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:51,084 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:26:51,084 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:51,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 14:26:51,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 14:26:51,285 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:26:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:51,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1224851216, now seen corresponding path program 15 times [2022-12-13 14:26:51,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:51,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020692261] [2022-12-13 14:26:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:51,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:51,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:51,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020692261] [2022-12-13 14:26:51,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020692261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:51,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546913756] [2022-12-13 14:26:51,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:26:51,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:51,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:51,446 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:51,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 14:26:51,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:26:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:26:51,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:26:51,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:51,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:26:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:26:51,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546913756] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:26:51,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:26:51,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-13 14:26:51,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769717304] [2022-12-13 14:26:51,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:26:51,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 14:26:51,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:26:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 14:26:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:26:51,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:26:51,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 1494 transitions, 39012 flow. Second operand has 23 states, 23 states have (on average 75.1304347826087) internal successors, (1728), 23 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:26:51,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:26:51,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:26:51,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:27:00,574 INFO L130 PetriNetUnfolder]: 7824/14937 cut-off events. [2022-12-13 14:27:00,574 INFO L131 PetriNetUnfolder]: For 2897984/2897984 co-relation queries the response was YES. [2022-12-13 14:27:00,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189741 conditions, 14937 events. 7824/14937 cut-off events. For 2897984/2897984 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 132753 event pairs, 17 based on Foata normal form. 478/15415 useless extension candidates. Maximal degree in co-relation 189627. Up to 3996 conditions per place. [2022-12-13 14:27:00,836 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 501 selfloop transitions, 1602 changer transitions 27/2130 dead transitions. [2022-12-13 14:27:00,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 2130 transitions, 57053 flow [2022-12-13 14:27:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 14:27:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 14:27:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2747 transitions. [2022-12-13 14:27:00,838 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42888368462138954 [2022-12-13 14:27:00,838 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2747 transitions. [2022-12-13 14:27:00,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2747 transitions. [2022-12-13 14:27:00,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:27:00,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2747 transitions. [2022-12-13 14:27:00,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 78.48571428571428) internal successors, (2747), 35 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:00,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 183.0) internal successors, (6588), 36 states have internal predecessors, (6588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:00,844 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 183.0) internal successors, (6588), 36 states have internal predecessors, (6588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:00,844 INFO L175 Difference]: Start difference. First operand has 339 places, 1494 transitions, 39012 flow. Second operand 35 states and 2747 transitions. [2022-12-13 14:27:00,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 2130 transitions, 57053 flow [2022-12-13 14:27:10,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 2130 transitions, 56123 flow, removed 418 selfloop flow, removed 7 redundant places. [2022-12-13 14:27:10,308 INFO L231 Difference]: Finished difference. Result has 375 places, 1875 transitions, 53681 flow [2022-12-13 14:27:10,309 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=38093, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=53681, PETRI_PLACES=375, PETRI_TRANSITIONS=1875} [2022-12-13 14:27:10,309 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 346 predicate places. [2022-12-13 14:27:10,309 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1875 transitions, 53681 flow [2022-12-13 14:27:10,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.1304347826087) internal successors, (1728), 23 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:10,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:27:10,309 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:27:10,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 14:27:10,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:10,510 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:27:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:27:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1758865402, now seen corresponding path program 16 times [2022-12-13 14:27:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:27:10,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570799736] [2022-12-13 14:27:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:10,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:27:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:27:10,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:27:10,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570799736] [2022-12-13 14:27:10,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570799736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:10,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115139772] [2022-12-13 14:27:10,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:27:10,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:10,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:27:10,603 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:27:10,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 14:27:10,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:27:10,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:27:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:27:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:27:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:27:10,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:27:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:27:10,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115139772] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:27:10,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:27:10,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-13 14:27:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57994441] [2022-12-13 14:27:10,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:27:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:27:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:27:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:27:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:27:10,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:27:10,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1875 transitions, 53681 flow. Second operand has 21 states, 21 states have (on average 74.76190476190476) internal successors, (1570), 21 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:10,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:27:10,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:27:10,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:27:23,137 INFO L130 PetriNetUnfolder]: 9319/17852 cut-off events. [2022-12-13 14:27:23,137 INFO L131 PetriNetUnfolder]: For 2891178/2891178 co-relation queries the response was YES. [2022-12-13 14:27:23,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247815 conditions, 17852 events. 9319/17852 cut-off events. For 2891178/2891178 co-relation queries the response was YES. Maximal size of possible extension queue 1258. Compared 163281 event pairs, 143 based on Foata normal form. 84/17936 useless extension candidates. Maximal degree in co-relation 247692. Up to 4852 conditions per place. [2022-12-13 14:27:23,369 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 1045 selfloop transitions, 1401 changer transitions 19/2465 dead transitions. [2022-12-13 14:27:23,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 2465 transitions, 74423 flow [2022-12-13 14:27:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 14:27:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 14:27:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3106 transitions. [2022-12-13 14:27:23,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4243169398907104 [2022-12-13 14:27:23,375 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3106 transitions. [2022-12-13 14:27:23,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3106 transitions. [2022-12-13 14:27:23,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:27:23,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3106 transitions. [2022-12-13 14:27:23,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 77.65) internal successors, (3106), 40 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:23,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 183.0) internal successors, (7503), 41 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:23,387 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 183.0) internal successors, (7503), 41 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:23,387 INFO L175 Difference]: Start difference. First operand has 375 places, 1875 transitions, 53681 flow. Second operand 40 states and 3106 transitions. [2022-12-13 14:27:23,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 2465 transitions, 74423 flow [2022-12-13 14:27:47,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 2465 transitions, 68942 flow, removed 2087 selfloop flow, removed 22 redundant places. [2022-12-13 14:27:47,383 INFO L231 Difference]: Finished difference. Result has 404 places, 2253 transitions, 66437 flow [2022-12-13 14:27:47,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=50526, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=66437, PETRI_PLACES=404, PETRI_TRANSITIONS=2253} [2022-12-13 14:27:47,384 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 375 predicate places. [2022-12-13 14:27:47,384 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 2253 transitions, 66437 flow [2022-12-13 14:27:47,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 74.76190476190476) internal successors, (1570), 21 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:47,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:27:47,384 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:27:47,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 14:27:47,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:47,585 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:27:47,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:27:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1688755366, now seen corresponding path program 17 times [2022-12-13 14:27:47,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:27:47,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661682462] [2022-12-13 14:27:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:27:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:27:47,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:27:47,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661682462] [2022-12-13 14:27:47,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661682462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:47,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758599996] [2022-12-13 14:27:47,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:27:47,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:47,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:27:47,683 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:27:47,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 14:27:47,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 14:27:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:27:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:27:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:27:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:27:47,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:27:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:27:47,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758599996] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:27:47,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:27:47,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-13 14:27:47,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926640781] [2022-12-13 14:27:47,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:27:47,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:27:47,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:27:47,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:27:47,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:27:47,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:27:47,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 2253 transitions, 66437 flow. Second operand has 21 states, 21 states have (on average 74.76190476190476) internal successors, (1570), 21 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:47,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:27:47,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:27:47,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:28:03,931 INFO L130 PetriNetUnfolder]: 10178/19647 cut-off events. [2022-12-13 14:28:03,932 INFO L131 PetriNetUnfolder]: For 1375171/1375171 co-relation queries the response was YES. [2022-12-13 14:28:04,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237549 conditions, 19647 events. 10178/19647 cut-off events. For 1375171/1375171 co-relation queries the response was YES. Maximal size of possible extension queue 1398. Compared 183856 event pairs, 281 based on Foata normal form. 84/19731 useless extension candidates. Maximal degree in co-relation 237423. Up to 6093 conditions per place. [2022-12-13 14:28:04,228 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 1551 selfloop transitions, 1042 changer transitions 9/2602 dead transitions. [2022-12-13 14:28:04,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 2602 transitions, 80170 flow [2022-12-13 14:28:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 14:28:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 14:28:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2505 transitions. [2022-12-13 14:28:04,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42776639344262296 [2022-12-13 14:28:04,231 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2505 transitions. [2022-12-13 14:28:04,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2505 transitions. [2022-12-13 14:28:04,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:28:04,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2505 transitions. [2022-12-13 14:28:04,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 78.28125) internal successors, (2505), 32 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:04,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 183.0) internal successors, (6039), 33 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:04,237 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 183.0) internal successors, (6039), 33 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:04,237 INFO L175 Difference]: Start difference. First operand has 404 places, 2253 transitions, 66437 flow. Second operand 32 states and 2505 transitions. [2022-12-13 14:28:04,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 2602 transitions, 80170 flow [2022-12-13 14:28:25,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 2602 transitions, 78719 flow, removed 515 selfloop flow, removed 16 redundant places. [2022-12-13 14:28:25,467 INFO L231 Difference]: Finished difference. Result has 428 places, 2435 transitions, 74427 flow [2022-12-13 14:28:25,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=65040, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=900, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=74427, PETRI_PLACES=428, PETRI_TRANSITIONS=2435} [2022-12-13 14:28:25,468 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 399 predicate places. [2022-12-13 14:28:25,468 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 2435 transitions, 74427 flow [2022-12-13 14:28:25,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 74.76190476190476) internal successors, (1570), 21 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:25,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:28:25,468 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:28:25,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 14:28:25,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:28:25,670 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:28:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:28:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash -345228920, now seen corresponding path program 18 times [2022-12-13 14:28:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:28:25,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558346594] [2022-12-13 14:28:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:28:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:28:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:28:25,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:28:25,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558346594] [2022-12-13 14:28:25,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558346594] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:28:25,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513851109] [2022-12-13 14:28:25,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:28:25,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:28:25,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:28:25,787 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:28:25,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 14:28:25,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:28:25,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:28:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:28:25,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:28:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:28:25,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:28:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:28:26,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513851109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:28:26,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:28:26,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-13 14:28:26,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325177613] [2022-12-13 14:28:26,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:28:26,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:28:26,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:28:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:28:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:28:26,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:28:26,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 2435 transitions, 74427 flow. Second operand has 24 states, 24 states have (on average 75.04166666666667) internal successors, (1801), 24 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:26,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:28:26,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:28:26,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:28:42,459 INFO L130 PetriNetUnfolder]: 10141/19404 cut-off events. [2022-12-13 14:28:42,459 INFO L131 PetriNetUnfolder]: For 1590012/1590012 co-relation queries the response was YES. [2022-12-13 14:28:42,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233907 conditions, 19404 events. 10141/19404 cut-off events. For 1590012/1590012 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 179650 event pairs, 867 based on Foata normal form. 552/19956 useless extension candidates. Maximal degree in co-relation 233776. Up to 16152 conditions per place. [2022-12-13 14:28:42,757 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 2151 selfloop transitions, 445 changer transitions 43/2639 dead transitions. [2022-12-13 14:28:42,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 2639 transitions, 83612 flow [2022-12-13 14:28:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 14:28:42,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 14:28:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2200 transitions. [2022-12-13 14:28:42,760 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42935206869633097 [2022-12-13 14:28:42,760 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2200 transitions. [2022-12-13 14:28:42,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2200 transitions. [2022-12-13 14:28:42,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:28:42,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2200 transitions. [2022-12-13 14:28:42,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 78.57142857142857) internal successors, (2200), 28 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:42,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 183.0) internal successors, (5307), 29 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:42,765 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 183.0) internal successors, (5307), 29 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:42,765 INFO L175 Difference]: Start difference. First operand has 428 places, 2435 transitions, 74427 flow. Second operand 28 states and 2200 transitions. [2022-12-13 14:28:42,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 2639 transitions, 83612 flow [2022-12-13 14:29:08,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 2639 transitions, 81105 flow, removed 1126 selfloop flow, removed 16 redundant places. [2022-12-13 14:29:08,946 INFO L231 Difference]: Finished difference. Result has 442 places, 2464 transitions, 74387 flow [2022-12-13 14:29:08,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=71440, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2039, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=74387, PETRI_PLACES=442, PETRI_TRANSITIONS=2464} [2022-12-13 14:29:08,948 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 413 predicate places. [2022-12-13 14:29:08,948 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 2464 transitions, 74387 flow [2022-12-13 14:29:08,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 75.04166666666667) internal successors, (1801), 24 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:08,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:29:08,948 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:29:08,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 14:29:09,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:09,149 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:29:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:29:09,150 INFO L85 PathProgramCache]: Analyzing trace with hash 207231399, now seen corresponding path program 19 times [2022-12-13 14:29:09,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:29:09,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455105352] [2022-12-13 14:29:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:29:09,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:29:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:29:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:29:09,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:29:09,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455105352] [2022-12-13 14:29:09,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455105352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:29:09,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915530859] [2022-12-13 14:29:09,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:29:09,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:09,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:29:09,227 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:29:09,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 14:29:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:29:09,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:29:09,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:29:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:29:09,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:29:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:29:09,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915530859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:29:09,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:29:09,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 22 [2022-12-13 14:29:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109889524] [2022-12-13 14:29:09,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:29:09,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 14:29:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:29:09,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 14:29:09,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:29:09,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:29:09,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 2464 transitions, 74387 flow. Second operand has 23 states, 23 states have (on average 74.95652173913044) internal successors, (1724), 23 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:09,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:29:09,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:29:09,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:29:27,222 INFO L130 PetriNetUnfolder]: 10718/20465 cut-off events. [2022-12-13 14:29:27,222 INFO L131 PetriNetUnfolder]: For 1290759/1290759 co-relation queries the response was YES. [2022-12-13 14:29:27,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240240 conditions, 20465 events. 10718/20465 cut-off events. For 1290759/1290759 co-relation queries the response was YES. Maximal size of possible extension queue 1454. Compared 190441 event pairs, 143 based on Foata normal form. 512/20977 useless extension candidates. Maximal degree in co-relation 240108. Up to 4714 conditions per place. [2022-12-13 14:29:27,527 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 623 selfloop transitions, 2235 changer transitions 111/2969 dead transitions. [2022-12-13 14:29:27,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 2969 transitions, 92465 flow [2022-12-13 14:29:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 14:29:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-13 14:29:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4315 transitions. [2022-12-13 14:29:27,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42871336313959263 [2022-12-13 14:29:27,531 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4315 transitions. [2022-12-13 14:29:27,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4315 transitions. [2022-12-13 14:29:27,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:29:27,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4315 transitions. [2022-12-13 14:29:27,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 78.45454545454545) internal successors, (4315), 55 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:27,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 183.0) internal successors, (10248), 56 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:27,542 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 183.0) internal successors, (10248), 56 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:27,542 INFO L175 Difference]: Start difference. First operand has 442 places, 2464 transitions, 74387 flow. Second operand 55 states and 4315 transitions. [2022-12-13 14:29:27,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 2969 transitions, 92465 flow [2022-12-13 14:29:51,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 2969 transitions, 91551 flow, removed 301 selfloop flow, removed 17 redundant places. [2022-12-13 14:29:51,678 INFO L231 Difference]: Finished difference. Result has 509 places, 2692 transitions, 89978 flow [2022-12-13 14:29:51,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=72726, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1985, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=89978, PETRI_PLACES=509, PETRI_TRANSITIONS=2692} [2022-12-13 14:29:51,679 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 480 predicate places. [2022-12-13 14:29:51,679 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 2692 transitions, 89978 flow [2022-12-13 14:29:51,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 74.95652173913044) internal successors, (1724), 23 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:51,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:29:51,680 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:29:51,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 14:29:51,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:51,881 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:29:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:29:51,882 INFO L85 PathProgramCache]: Analyzing trace with hash -286772099, now seen corresponding path program 20 times [2022-12-13 14:29:51,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:29:51,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469162892] [2022-12-13 14:29:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:29:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:29:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:29:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:29:52,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:29:52,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469162892] [2022-12-13 14:29:52,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469162892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:29:52,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924703124] [2022-12-13 14:29:52,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:29:52,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:29:52,028 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:29:52,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 14:29:52,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:29:52,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:29:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:29:52,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:29:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:29:52,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:29:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:29:52,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924703124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:29:52,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:29:52,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-13 14:29:52,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959286542] [2022-12-13 14:29:52,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:29:52,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:29:52,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:29:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:29:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:29:52,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:29:52,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 2692 transitions, 89978 flow. Second operand has 26 states, 26 states have (on average 74.8076923076923) internal successors, (1945), 26 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) [2022-12-13 14:29:52,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:29:52,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:29:52,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:30:13,335 INFO L130 PetriNetUnfolder]: 11923/22528 cut-off events. [2022-12-13 14:30:13,335 INFO L131 PetriNetUnfolder]: For 1758880/1758880 co-relation queries the response was YES. [2022-12-13 14:30:13,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289427 conditions, 22528 events. 11923/22528 cut-off events. For 1758880/1758880 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 210181 event pairs, 399 based on Foata normal form. 670/23198 useless extension candidates. Maximal degree in co-relation 289264. Up to 6581 conditions per place. [2022-12-13 14:30:13,752 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 1134 selfloop transitions, 2125 changer transitions 54/3313 dead transitions. [2022-12-13 14:30:13,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 3313 transitions, 115270 flow [2022-12-13 14:30:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 14:30:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 14:30:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2810 transitions. [2022-12-13 14:30:13,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4265330904675167 [2022-12-13 14:30:13,756 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2810 transitions. [2022-12-13 14:30:13,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2810 transitions. [2022-12-13 14:30:13,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:30:13,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2810 transitions. [2022-12-13 14:30:13,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 78.05555555555556) internal successors, (2810), 36 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:13,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 183.0) internal successors, (6771), 37 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:13,762 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 183.0) internal successors, (6771), 37 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:13,762 INFO L175 Difference]: Start difference. First operand has 509 places, 2692 transitions, 89978 flow. Second operand 36 states and 2810 transitions. [2022-12-13 14:30:13,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 3313 transitions, 115270 flow [2022-12-13 14:31:01,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 3313 transitions, 109595 flow, removed 1771 selfloop flow, removed 22 redundant places. [2022-12-13 14:31:01,230 INFO L231 Difference]: Finished difference. Result has 521 places, 3032 transitions, 104782 flow [2022-12-13 14:31:01,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=85539, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=104782, PETRI_PLACES=521, PETRI_TRANSITIONS=3032} [2022-12-13 14:31:01,231 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 492 predicate places. [2022-12-13 14:31:01,231 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 3032 transitions, 104782 flow [2022-12-13 14:31:01,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.8076923076923) internal successors, (1945), 26 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) [2022-12-13 14:31:01,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:31:01,232 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:31:01,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 14:31:01,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 14:31:01,433 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:31:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:31:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash -194169915, now seen corresponding path program 21 times [2022-12-13 14:31:01,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:31:01,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416661646] [2022-12-13 14:31:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:01,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:31:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:31:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:01,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:31:01,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416661646] [2022-12-13 14:31:01,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416661646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:31:01,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603163028] [2022-12-13 14:31:01,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:31:01,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:31:01,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:31:01,564 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:31:01,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 14:31:01,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 14:31:01,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:31:01,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:31:01,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:31:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:01,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:31:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:01,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603163028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:31:01,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:31:01,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-13 14:31:01,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220136720] [2022-12-13 14:31:01,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:31:01,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:31:01,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:31:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:31:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:31:01,993 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:31:01,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 3032 transitions, 104782 flow. Second operand has 26 states, 26 states have (on average 74.57692307692308) internal successors, (1939), 26 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:01,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:31:01,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:31:01,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:31:28,979 INFO L130 PetriNetUnfolder]: 12855/24425 cut-off events. [2022-12-13 14:31:28,979 INFO L131 PetriNetUnfolder]: For 1823700/1823700 co-relation queries the response was YES. [2022-12-13 14:31:29,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318492 conditions, 24425 events. 12855/24425 cut-off events. For 1823700/1823700 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 231160 event pairs, 169 based on Foata normal form. 104/24529 useless extension candidates. Maximal degree in co-relation 318332. Up to 7002 conditions per place. [2022-12-13 14:31:29,420 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 1996 selfloop transitions, 1402 changer transitions 3/3401 dead transitions. [2022-12-13 14:31:29,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 3401 transitions, 121852 flow [2022-12-13 14:31:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 14:31:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 14:31:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2196 transitions. [2022-12-13 14:31:29,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-12-13 14:31:29,422 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2196 transitions. [2022-12-13 14:31:29,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2196 transitions. [2022-12-13 14:31:29,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:31:29,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2196 transitions. [2022-12-13 14:31:29,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 78.42857142857143) internal successors, (2196), 28 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:29,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 183.0) internal successors, (5307), 29 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:29,428 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 183.0) internal successors, (5307), 29 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:29,428 INFO L175 Difference]: Start difference. First operand has 521 places, 3032 transitions, 104782 flow. Second operand 28 states and 2196 transitions. [2022-12-13 14:31:29,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 3401 transitions, 121852 flow [2022-12-13 14:32:23,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 3401 transitions, 120663 flow, removed 507 selfloop flow, removed 15 redundant places. [2022-12-13 14:32:23,250 INFO L231 Difference]: Finished difference. Result has 547 places, 3267 transitions, 116701 flow [2022-12-13 14:32:23,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=103744, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=116701, PETRI_PLACES=547, PETRI_TRANSITIONS=3267} [2022-12-13 14:32:23,252 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 518 predicate places. [2022-12-13 14:32:23,252 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 3267 transitions, 116701 flow [2022-12-13 14:32:23,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.57692307692308) internal successors, (1939), 26 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:23,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:23,252 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:32:23,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 14:32:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 14:32:23,453 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:32:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2124237115, now seen corresponding path program 22 times [2022-12-13 14:32:23,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:32:23,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184966303] [2022-12-13 14:32:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:23,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:32:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:23,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:32:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184966303] [2022-12-13 14:32:23,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184966303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:32:23,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39348085] [2022-12-13 14:32:23,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:32:23,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:32:23,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:32:23,611 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:32:23,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 14:32:23,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:32:23,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:32:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:32:23,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:23,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:32:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:23,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39348085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:32:23,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:32:23,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 25 [2022-12-13 14:32:23,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498711270] [2022-12-13 14:32:23,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:32:23,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:32:23,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:32:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:32:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:32:23,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:32:23,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 3267 transitions, 116701 flow. Second operand has 26 states, 26 states have (on average 74.8076923076923) internal successors, (1945), 26 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) [2022-12-13 14:32:23,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:23,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:32:23,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:51,332 INFO L130 PetriNetUnfolder]: 12617/23796 cut-off events. [2022-12-13 14:32:51,332 INFO L131 PetriNetUnfolder]: For 1960755/1960755 co-relation queries the response was YES. [2022-12-13 14:32:51,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321057 conditions, 23796 events. 12617/23796 cut-off events. For 1960755/1960755 co-relation queries the response was YES. Maximal size of possible extension queue 1656. Compared 222745 event pairs, 1045 based on Foata normal form. 368/24164 useless extension candidates. Maximal degree in co-relation 320886. Up to 19713 conditions per place. [2022-12-13 14:32:51,784 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 2802 selfloop transitions, 524 changer transitions 25/3351 dead transitions. [2022-12-13 14:32:51,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 3351 transitions, 124371 flow [2022-12-13 14:32:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 14:32:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 14:32:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1793 transitions. [2022-12-13 14:32:51,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.425991922071751 [2022-12-13 14:32:51,787 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1793 transitions. [2022-12-13 14:32:51,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1793 transitions. [2022-12-13 14:32:51,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:51,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1793 transitions. [2022-12-13 14:32:51,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 77.95652173913044) internal successors, (1793), 23 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:51,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 183.0) internal successors, (4392), 24 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:51,791 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 183.0) internal successors, (4392), 24 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:51,791 INFO L175 Difference]: Start difference. First operand has 547 places, 3267 transitions, 116701 flow. Second operand 23 states and 1793 transitions. [2022-12-13 14:32:51,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 3351 transitions, 124371 flow [2022-12-13 14:33:47,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 3351 transitions, 122708 flow, removed 686 selfloop flow, removed 13 redundant places. [2022-12-13 14:33:47,903 INFO L231 Difference]: Finished difference. Result has 557 places, 3224 transitions, 115701 flow [2022-12-13 14:33:47,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=113882, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=115701, PETRI_PLACES=557, PETRI_TRANSITIONS=3224} [2022-12-13 14:33:47,905 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 528 predicate places. [2022-12-13 14:33:47,905 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 3224 transitions, 115701 flow [2022-12-13 14:33:47,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.8076923076923) internal successors, (1945), 26 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) [2022-12-13 14:33:47,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:33:47,905 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:33:47,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 14:33:48,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:33:48,106 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:33:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:33:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1114223013, now seen corresponding path program 23 times [2022-12-13 14:33:48,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:33:48,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943146113] [2022-12-13 14:33:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:33:48,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:33:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:33:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:33:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:33:48,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943146113] [2022-12-13 14:33:48,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943146113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:33:48,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135535183] [2022-12-13 14:33:48,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:33:48,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:33:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:33:48,251 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:33:48,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 14:33:48,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 14:33:48,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:33:48,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:33:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:33:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:33:48,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:33:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:33:48,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135535183] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:33:48,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:33:48,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-12-13 14:33:48,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079977173] [2022-12-13 14:33:48,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:33:48,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 14:33:48,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:33:48,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 14:33:48,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-12-13 14:33:48,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:33:48,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 3224 transitions, 115701 flow. Second operand has 27 states, 27 states have (on average 74.96296296296296) internal successors, (2024), 27 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:48,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:33:48,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:33:48,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:34:22,384 INFO L130 PetriNetUnfolder]: 14519/27372 cut-off events. [2022-12-13 14:34:22,384 INFO L131 PetriNetUnfolder]: For 2203202/2203202 co-relation queries the response was YES. [2022-12-13 14:34:22,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367639 conditions, 27372 events. 14519/27372 cut-off events. For 2203202/2203202 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 261681 event pairs, 151 based on Foata normal form. 478/27850 useless extension candidates. Maximal degree in co-relation 367469. Up to 6863 conditions per place. [2022-12-13 14:34:22,934 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 747 selfloop transitions, 3265 changer transitions 36/4048 dead transitions. [2022-12-13 14:34:22,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 4048 transitions, 147674 flow [2022-12-13 14:34:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 14:34:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-13 14:34:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4155 transitions. [2022-12-13 14:34:22,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4283946798639035 [2022-12-13 14:34:22,941 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4155 transitions. [2022-12-13 14:34:22,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4155 transitions. [2022-12-13 14:34:22,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:34:22,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4155 transitions. [2022-12-13 14:34:22,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 78.39622641509433) internal successors, (4155), 53 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:34:22,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 183.0) internal successors, (9882), 54 states have internal predecessors, (9882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:34:22,954 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 183.0) internal successors, (9882), 54 states have internal predecessors, (9882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:34:22,954 INFO L175 Difference]: Start difference. First operand has 557 places, 3224 transitions, 115701 flow. Second operand 53 states and 4155 transitions. [2022-12-13 14:34:22,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 4048 transitions, 147674 flow [2022-12-13 14:35:36,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 4048 transitions, 146378 flow, removed 49 selfloop flow, removed 13 redundant places. [2022-12-13 14:35:36,899 INFO L231 Difference]: Finished difference. Result has 609 places, 3684 transitions, 139478 flow [2022-12-13 14:35:36,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=114510, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=139478, PETRI_PLACES=609, PETRI_TRANSITIONS=3684} [2022-12-13 14:35:36,901 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 580 predicate places. [2022-12-13 14:35:36,901 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 3684 transitions, 139478 flow [2022-12-13 14:35:36,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.96296296296296) internal successors, (2024), 27 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:36,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:35:36,902 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:35:36,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 14:35:37,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 14:35:37,103 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:35:37,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:35:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash -59039621, now seen corresponding path program 24 times [2022-12-13 14:35:37,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:35:37,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427618255] [2022-12-13 14:35:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:35:37,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:35:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:35:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:35:37,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:35:37,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427618255] [2022-12-13 14:35:37,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427618255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:35:37,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890954791] [2022-12-13 14:35:37,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:35:37,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:35:37,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:35:37,263 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:35:37,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 14:35:37,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:35:37,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:35:37,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:35:37,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:35:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:35:37,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:35:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:35:37,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890954791] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:35:37,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:35:37,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-12-13 14:35:37,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460960337] [2022-12-13 14:35:37,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:35:37,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 14:35:37,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:35:37,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 14:35:37,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-12-13 14:35:37,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:35:37,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 3684 transitions, 139478 flow. Second operand has 27 states, 27 states have (on average 75.0) internal successors, (2025), 27 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:37,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:35:37,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:35:37,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:36:18,045 INFO L130 PetriNetUnfolder]: 15473/29154 cut-off events. [2022-12-13 14:36:18,045 INFO L131 PetriNetUnfolder]: For 2537865/2537865 co-relation queries the response was YES. [2022-12-13 14:36:18,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407163 conditions, 29154 events. 15473/29154 cut-off events. For 2537865/2537865 co-relation queries the response was YES. Maximal size of possible extension queue 2090. Compared 280673 event pairs, 195 based on Foata normal form. 126/29280 useless extension candidates. Maximal degree in co-relation 406981. Up to 9375 conditions per place. [2022-12-13 14:36:18,702 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 815 selfloop transitions, 3301 changer transitions 26/4142 dead transitions. [2022-12-13 14:36:18,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 4142 transitions, 161343 flow [2022-12-13 14:36:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 14:36:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 14:36:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2597 transitions. [2022-12-13 14:36:18,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43003808577579067 [2022-12-13 14:36:18,705 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2597 transitions. [2022-12-13 14:36:18,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2597 transitions. [2022-12-13 14:36:18,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:36:18,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2597 transitions. [2022-12-13 14:36:18,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 78.6969696969697) internal successors, (2597), 33 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) [2022-12-13 14:36:18,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 183.0) internal successors, (6222), 34 states have internal predecessors, (6222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:18,713 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 183.0) internal successors, (6222), 34 states have internal predecessors, (6222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:18,713 INFO L175 Difference]: Start difference. First operand has 609 places, 3684 transitions, 139478 flow. Second operand 33 states and 2597 transitions. [2022-12-13 14:36:18,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 4142 transitions, 161343 flow [2022-12-13 14:37:49,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 4142 transitions, 154910 flow, removed 605 selfloop flow, removed 27 redundant places. [2022-12-13 14:37:49,660 INFO L231 Difference]: Finished difference. Result has 618 places, 3902 transitions, 151748 flow [2022-12-13 14:37:49,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=133786, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3077, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=151748, PETRI_PLACES=618, PETRI_TRANSITIONS=3902} [2022-12-13 14:37:49,662 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 589 predicate places. [2022-12-13 14:37:49,662 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 3902 transitions, 151748 flow [2022-12-13 14:37:49,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 75.0) internal successors, (2025), 27 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:37:49,662 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:49,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 14:37:49,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:49,863 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 14:37:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 154358531, now seen corresponding path program 25 times [2022-12-13 14:37:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:49,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636634643] [2022-12-13 14:37:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:37:49,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636634643] [2022-12-13 14:37:49,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636634643] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:37:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417485383] [2022-12-13 14:37:49,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:37:49,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:49,996 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:49,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ccf532-acd0-4981-bbc9-8ec54a72a5b9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 14:37:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:50,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:37:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:37:50,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:37:50,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417485383] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:37:50,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:37:50,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-12-13 14:37:50,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921909591] [2022-12-13 14:37:50,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:50,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:37:50,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:37:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:37:50,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2022-12-13 14:37:50,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 3902 transitions, 151748 flow. Second operand has 28 states, 28 states have (on average 74.92857142857143) internal successors, (2098), 28 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:50,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:37:50,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2022-12-13 14:37:50,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:38:37,961 INFO L130 PetriNetUnfolder]: 16238/30555 cut-off events. [2022-12-13 14:38:37,961 INFO L131 PetriNetUnfolder]: For 2892347/2892347 co-relation queries the response was YES. [2022-12-13 14:38:38,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432649 conditions, 30555 events. 16238/30555 cut-off events. For 2892347/2892347 co-relation queries the response was YES. Maximal size of possible extension queue 2213. Compared 295889 event pairs, 219 based on Foata normal form. 130/30685 useless extension candidates. Maximal degree in co-relation 432465. Up to 7980 conditions per place. [2022-12-13 14:38:38,672 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 777 selfloop transitions, 3609 changer transitions 20/4406 dead transitions. [2022-12-13 14:38:38,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 4406 transitions, 173877 flow [2022-12-13 14:38:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 14:38:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 14:38:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3221 transitions. [2022-12-13 14:38:38,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4292949486871918 [2022-12-13 14:38:38,675 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3221 transitions. [2022-12-13 14:38:38,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3221 transitions. [2022-12-13 14:38:38,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:38:38,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3221 transitions. [2022-12-13 14:38:38,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 78.5609756097561) internal successors, (3221), 41 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:38,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 183.0) internal successors, (7686), 42 states have internal predecessors, (7686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:38,682 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 183.0) internal successors, (7686), 42 states have internal predecessors, (7686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:38,682 INFO L175 Difference]: Start difference. First operand has 618 places, 3902 transitions, 151748 flow. Second operand 41 states and 3221 transitions. [2022-12-13 14:38:38,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 4406 transitions, 173877 flow