./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP --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 ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:12:02,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:12:02,246 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:12:02,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:12:02,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:12:02,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:12:02,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:12:02,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:12:02,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:12:02,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:12:02,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:12:02,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:12:02,285 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:12:02,286 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:12:02,286 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:12:02,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:12:02,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:12:02,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:12:02,288 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:12:02,289 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:12:02,289 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:12:02,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:12:02,291 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:12:02,291 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:12:02,292 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:12:02,292 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:12:02,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:12:02,293 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:12:02,293 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:12:02,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:02,294 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:12:02,295 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:12:02,295 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:12:02,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:12:02,295 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:12:02,296 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:12:02,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:12:02,296 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:12:02,296 INFO L153 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_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 [2023-11-06 22:12:02,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:12:02,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:12:02,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:12:02,663 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:12:02,664 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:12:02,666 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2023-11-06 22:12:05,788 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:12:06,096 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:12:06,099 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2023-11-06 22:12:06,123 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/data/875d39601/eabbb44760d54946a4d3c7faffc361fb/FLAG298dcb9a7 [2023-11-06 22:12:06,141 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/data/875d39601/eabbb44760d54946a4d3c7faffc361fb [2023-11-06 22:12:06,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:12:06,152 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:12:06,154 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:06,154 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:12:06,160 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:12:06,160 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:06" (1/1) ... [2023-11-06 22:12:06,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329d8e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:06, skipping insertion in model container [2023-11-06 22:12:06,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:06" (1/1) ... [2023-11-06 22:12:06,231 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:12:06,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:06,886 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:12:06,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:07,046 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:12:07,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07 WrapperNode [2023-11-06 22:12:07,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:07,049 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:07,049 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:12:07,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:12:07,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,082 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,108 INFO L138 Inliner]: procedures = 262, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-11-06 22:12:07,109 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:07,109 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:12:07,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:12:07,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:12:07,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,123 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,124 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,131 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,148 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,150 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,152 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,155 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:12:07,156 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:12:07,156 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:12:07,157 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:12:07,157 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (1/1) ... [2023-11-06 22:12:07,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:07,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:07,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:12:07,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:12:07,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:12:07,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:12:07,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:12:07,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:12:07,235 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:12:07,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:12:07,235 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:12:07,236 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:12:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:12:07,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:12:07,238 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:12:07,424 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:12:07,426 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:12:07,622 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:12:07,629 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:12:07,630 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:12:07,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:07 BoogieIcfgContainer [2023-11-06 22:12:07,632 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:12:07,635 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:12:07,635 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:12:07,638 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:12:07,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:12:06" (1/3) ... [2023-11-06 22:12:07,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fce771d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:07, skipping insertion in model container [2023-11-06 22:12:07,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:07" (2/3) ... [2023-11-06 22:12:07,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fce771d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:07, skipping insertion in model container [2023-11-06 22:12:07,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:07" (3/3) ... [2023-11-06 22:12:07,641 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2023-11-06 22:12:07,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:12:07,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-06 22:12:07,662 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:12:07,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:12:07,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 89 transitions, 182 flow [2023-11-06 22:12:07,823 INFO L124 PetriNetUnfolderBase]: 6/88 cut-off events. [2023-11-06 22:12:07,824 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:07,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 88 events. 6/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 162 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2023-11-06 22:12:07,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 89 transitions, 182 flow [2023-11-06 22:12:07,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 88 transitions, 179 flow [2023-11-06 22:12:07,855 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:07,876 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 88 transitions, 179 flow [2023-11-06 22:12:07,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 88 transitions, 179 flow [2023-11-06 22:12:07,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 179 flow [2023-11-06 22:12:07,917 INFO L124 PetriNetUnfolderBase]: 6/88 cut-off events. [2023-11-06 22:12:07,918 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:07,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 88 events. 6/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 162 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2023-11-06 22:12:07,921 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2023-11-06 22:12:10,574 INFO L134 LiptonReduction]: Checked pairs total: 2518 [2023-11-06 22:12:10,576 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-11-06 22:12:10,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:10,607 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;@3f3fdd2a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:10,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-06 22:12:10,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:10,610 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:12:10,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:10,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:10,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:12:10,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:10,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash 11268, now seen corresponding path program 1 times [2023-11-06 22:12:10,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:10,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109501741] [2023-11-06 22:12:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:10,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:10,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:10,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109501741] [2023-11-06 22:12:10,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109501741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:10,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:10,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:10,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160303792] [2023-11-06 22:12:10,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:10,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:10,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:10,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 178 [2023-11-06 22:12:10,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 86.0) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:10,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:10,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 178 [2023-11-06 22:12:10,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:11,004 INFO L124 PetriNetUnfolderBase]: 74/156 cut-off events. [2023-11-06 22:12:11,005 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:11,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 156 events. 74/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 590 event pairs, 56 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 296. Up to 149 conditions per place. [2023-11-06 22:12:11,012 INFO L140 encePairwiseOnDemand]: 173/178 looper letters, 21 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2023-11-06 22:12:11,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 89 flow [2023-11-06 22:12:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:12:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:12:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2023-11-06 22:12:11,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550561797752809 [2023-11-06 22:12:11,031 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2023-11-06 22:12:11,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2023-11-06 22:12:11,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:11,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2023-11-06 22:12:11,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,048 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,050 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 57 flow. Second operand 2 states and 196 transitions. [2023-11-06 22:12:11,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 89 flow [2023-11-06 22:12:11,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:12:11,055 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 46 flow [2023-11-06 22:12:11,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-11-06 22:12:11,062 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-11-06 22:12:11,062 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 46 flow [2023-11-06 22:12:11,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.0) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:11,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:12:11,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:12:11,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:11,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:11,065 INFO L85 PathProgramCache]: Analyzing trace with hash 335861476, now seen corresponding path program 1 times [2023-11-06 22:12:11,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:11,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263497827] [2023-11-06 22:12:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:11,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:11,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:11,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263497827] [2023-11-06 22:12:11,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263497827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:11,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:12:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854505885] [2023-11-06 22:12:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:11,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:12:11,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:12:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:12:11,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 178 [2023-11-06 22:12:11,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:11,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 178 [2023-11-06 22:12:11,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:11,346 INFO L124 PetriNetUnfolderBase]: 74/157 cut-off events. [2023-11-06 22:12:11,347 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:11,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 157 events. 74/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 595 event pairs, 56 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 308. Up to 149 conditions per place. [2023-11-06 22:12:11,349 INFO L140 encePairwiseOnDemand]: 175/178 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-11-06 22:12:11,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 92 flow [2023-11-06 22:12:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:12:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:12:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2023-11-06 22:12:11,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868913857677903 [2023-11-06 22:12:11,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2023-11-06 22:12:11,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2023-11-06 22:12:11,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:11,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2023-11-06 22:12:11,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,358 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 46 flow. Second operand 3 states and 260 transitions. [2023-11-06 22:12:11,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 92 flow [2023-11-06 22:12:11,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:11,359 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 58 flow [2023-11-06 22:12:11,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-11-06 22:12:11,360 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2023-11-06 22:12:11,360 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 58 flow [2023-11-06 22:12:11,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:11,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:12:11,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:12:11,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:11,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:11,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1813229305, now seen corresponding path program 1 times [2023-11-06 22:12:11,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:11,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69017001] [2023-11-06 22:12:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:11,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69017001] [2023-11-06 22:12:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69017001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422836704] [2023-11-06 22:12:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:11,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:11,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:11,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:11,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:12:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:11,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:12:11,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:11,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:11,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422836704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:11,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:11,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:12:11,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464051550] [2023-11-06 22:12:11,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:11,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:12:11,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:11,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:12:11,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:12:11,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 178 [2023-11-06 22:12:11,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 79.57142857142857) internal successors, (557), 7 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:11,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 178 [2023-11-06 22:12:11,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:11,792 INFO L124 PetriNetUnfolderBase]: 74/160 cut-off events. [2023-11-06 22:12:11,792 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:11,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 160 events. 74/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 595 event pairs, 56 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 322. Up to 149 conditions per place. [2023-11-06 22:12:11,794 INFO L140 encePairwiseOnDemand]: 175/178 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2023-11-06 22:12:11,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 120 flow [2023-11-06 22:12:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:12:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:12:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 496 transitions. [2023-11-06 22:12:11,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46441947565543074 [2023-11-06 22:12:11,799 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 496 transitions. [2023-11-06 22:12:11,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 496 transitions. [2023-11-06 22:12:11,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:11,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 496 transitions. [2023-11-06 22:12:11,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,808 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,808 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 6 states and 496 transitions. [2023-11-06 22:12:11,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 120 flow [2023-11-06 22:12:11,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 116 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:12:11,810 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 90 flow [2023-11-06 22:12:11,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-11-06 22:12:11,811 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-11-06 22:12:11,811 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 90 flow [2023-11-06 22:12:11,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.57142857142857) internal successors, (557), 7 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:11,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:11,812 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-06 22:12:11,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:12:12,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:12,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:12,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash 218412068, now seen corresponding path program 2 times [2023-11-06 22:12:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890287717] [2023-11-06 22:12:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:12,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:12,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890287717] [2023-11-06 22:12:12,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890287717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:12,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111490664] [2023-11-06 22:12:12,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:12:12,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:12,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:12,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:12,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:12:12,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:12:12,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:12,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:12:12,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:12,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:12:12,408 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:12:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:12:12,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:12:12,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111490664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:12,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:12:12,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-06 22:12:12,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818804807] [2023-11-06 22:12:12,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:12,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:12:12,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:12,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:12:12,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:12:12,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 178 [2023-11-06 22:12:12,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:12,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:12,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 178 [2023-11-06 22:12:12,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:12,610 INFO L124 PetriNetUnfolderBase]: 66/141 cut-off events. [2023-11-06 22:12:12,610 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:12:12,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 141 events. 66/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 517 event pairs, 35 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 297. Up to 104 conditions per place. [2023-11-06 22:12:12,614 INFO L140 encePairwiseOnDemand]: 174/178 looper letters, 29 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-06 22:12:12,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 168 flow [2023-11-06 22:12:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:12:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:12:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-11-06 22:12:12,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205992509363296 [2023-11-06 22:12:12,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-11-06 22:12:12,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-11-06 22:12:12,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:12,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-11-06 22:12:12,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:12,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:12,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:12,621 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 90 flow. Second operand 3 states and 278 transitions. [2023-11-06 22:12:12,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 168 flow [2023-11-06 22:12:12,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 154 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:12:12,626 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 80 flow [2023-11-06 22:12:12,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-06 22:12:12,629 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-11-06 22:12:12,629 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 80 flow [2023-11-06 22:12:12,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:12,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:12,631 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-06 22:12:12,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:12,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:12,836 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:12,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash 218412067, now seen corresponding path program 1 times [2023-11-06 22:12:12,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:12,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304224282] [2023-11-06 22:12:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:12,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:12,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304224282] [2023-11-06 22:12:12,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304224282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:12,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874092334] [2023-11-06 22:12:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:12,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:12,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:12,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:13,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:12:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:13,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:12:13,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:13,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:13,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874092334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:13,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:13,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-06 22:12:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357016961] [2023-11-06 22:12:13,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:13,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:12:13,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:13,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:12:13,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:12:13,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 178 [2023-11-06 22:12:13,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 80 flow. Second operand has 12 states, 12 states have (on average 79.25) internal successors, (951), 12 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:13,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 178 [2023-11-06 22:12:13,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:13,316 INFO L124 PetriNetUnfolderBase]: 66/149 cut-off events. [2023-11-06 22:12:13,316 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-06 22:12:13,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 149 events. 66/149 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 497 event pairs, 49 based on Foata normal form. 6/115 useless extension candidates. Maximal degree in co-relation 333. Up to 133 conditions per place. [2023-11-06 22:12:13,320 INFO L140 encePairwiseOnDemand]: 175/178 looper letters, 19 selfloop transitions, 11 changer transitions 0/31 dead transitions. [2023-11-06 22:12:13,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 31 transitions, 176 flow [2023-11-06 22:12:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:12:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:12:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 972 transitions. [2023-11-06 22:12:13,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4550561797752809 [2023-11-06 22:12:13,325 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 972 transitions. [2023-11-06 22:12:13,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 972 transitions. [2023-11-06 22:12:13,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:13,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 972 transitions. [2023-11-06 22:12:13,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 81.0) internal successors, (972), 12 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,339 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,339 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 80 flow. Second operand 12 states and 972 transitions. [2023-11-06 22:12:13,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 31 transitions, 176 flow [2023-11-06 22:12:13,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 31 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:12:13,342 INFO L231 Difference]: Finished difference. Result has 48 places, 31 transitions, 158 flow [2023-11-06 22:12:13,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=31} [2023-11-06 22:12:13,345 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2023-11-06 22:12:13,345 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 31 transitions, 158 flow [2023-11-06 22:12:13,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 79.25) internal successors, (951), 12 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:13,346 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-06 22:12:13,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:12:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:13,552 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:13,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash -959294468, now seen corresponding path program 1 times [2023-11-06 22:12:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:13,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440272366] [2023-11-06 22:12:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:13,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:13,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:13,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440272366] [2023-11-06 22:12:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440272366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:13,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:13,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:12:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526143751] [2023-11-06 22:12:13,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:13,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:12:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:12:13,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:12:13,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 178 [2023-11-06 22:12:13,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 31 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:13,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 178 [2023-11-06 22:12:13,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:13,734 INFO L124 PetriNetUnfolderBase]: 106/224 cut-off events. [2023-11-06 22:12:13,734 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-06 22:12:13,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 224 events. 106/224 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 793 event pairs, 49 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 495. Up to 143 conditions per place. [2023-11-06 22:12:13,738 INFO L140 encePairwiseOnDemand]: 174/178 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-06 22:12:13,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 270 flow [2023-11-06 22:12:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:12:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:12:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2023-11-06 22:12:13,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093632958801498 [2023-11-06 22:12:13,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2023-11-06 22:12:13,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2023-11-06 22:12:13,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:13,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2023-11-06 22:12:13,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,745 INFO L175 Difference]: Start difference. First operand has 48 places, 31 transitions, 158 flow. Second operand 3 states and 272 transitions. [2023-11-06 22:12:13,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 270 flow [2023-11-06 22:12:13,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 222 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-06 22:12:13,754 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 124 flow [2023-11-06 22:12:13,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2023-11-06 22:12:13,757 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2023-11-06 22:12:13,757 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 124 flow [2023-11-06 22:12:13,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:13,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:13,758 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-06 22:12:13,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:12:13,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:13,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:13,762 INFO L85 PathProgramCache]: Analyzing trace with hash -959294461, now seen corresponding path program 2 times [2023-11-06 22:12:13,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:13,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358118264] [2023-11-06 22:12:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:13,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:14,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:14,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358118264] [2023-11-06 22:12:14,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358118264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:14,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:14,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:12:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881056575] [2023-11-06 22:12:14,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:12:14,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:14,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:12:14,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:12:14,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 178 [2023-11-06 22:12:14,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:14,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 178 [2023-11-06 22:12:14,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:14,309 INFO L124 PetriNetUnfolderBase]: 98/208 cut-off events. [2023-11-06 22:12:14,309 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-06 22:12:14,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 208 events. 98/208 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 689 event pairs, 49 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 487. Up to 142 conditions per place. [2023-11-06 22:12:14,312 INFO L140 encePairwiseOnDemand]: 174/178 looper letters, 39 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2023-11-06 22:12:14,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 230 flow [2023-11-06 22:12:14,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:12:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:12:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2023-11-06 22:12:14,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789325842696629 [2023-11-06 22:12:14,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 341 transitions. [2023-11-06 22:12:14,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 341 transitions. [2023-11-06 22:12:14,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:14,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 341 transitions. [2023-11-06 22:12:14,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,318 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,319 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 124 flow. Second operand 4 states and 341 transitions. [2023-11-06 22:12:14,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 230 flow [2023-11-06 22:12:14,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:12:14,321 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 132 flow [2023-11-06 22:12:14,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2023-11-06 22:12:14,322 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2023-11-06 22:12:14,323 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 132 flow [2023-11-06 22:12:14,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:14,323 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-06 22:12:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:12:14,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:14,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash -959294400, now seen corresponding path program 1 times [2023-11-06 22:12:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:14,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404735555] [2023-11-06 22:12:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:14,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404735555] [2023-11-06 22:12:14,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404735555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:14,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:14,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:12:14,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318539158] [2023-11-06 22:12:14,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:14,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:12:14,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:12:14,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:12:14,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 178 [2023-11-06 22:12:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:14,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 178 [2023-11-06 22:12:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:14,811 INFO L124 PetriNetUnfolderBase]: 158/350 cut-off events. [2023-11-06 22:12:14,811 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-11-06 22:12:14,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 350 events. 158/350 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1489 event pairs, 77 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 819. Up to 206 conditions per place. [2023-11-06 22:12:14,815 INFO L140 encePairwiseOnDemand]: 173/178 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-11-06 22:12:14,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 268 flow [2023-11-06 22:12:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:12:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:12:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 351 transitions. [2023-11-06 22:12:14,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49297752808988765 [2023-11-06 22:12:14,817 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 351 transitions. [2023-11-06 22:12:14,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 351 transitions. [2023-11-06 22:12:14,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:14,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 351 transitions. [2023-11-06 22:12:14,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,821 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,822 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 132 flow. Second operand 4 states and 351 transitions. [2023-11-06 22:12:14,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 268 flow [2023-11-06 22:12:14,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 258 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:12:14,825 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 142 flow [2023-11-06 22:12:14,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2023-11-06 22:12:14,825 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-11-06 22:12:14,826 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 142 flow [2023-11-06 22:12:14,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:14,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:14,826 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:14,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:12:14,827 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:14,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:14,827 INFO L85 PathProgramCache]: Analyzing trace with hash 326644906, now seen corresponding path program 1 times [2023-11-06 22:12:14,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:14,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499025063] [2023-11-06 22:12:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:14,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:14,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499025063] [2023-11-06 22:12:14,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499025063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:14,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:14,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:12:14,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227586614] [2023-11-06 22:12:14,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:14,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:12:14,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:12:14,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:12:15,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 178 [2023-11-06 22:12:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 77.4) internal successors, (387), 5 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:15,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:15,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 178 [2023-11-06 22:12:15,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:15,270 INFO L124 PetriNetUnfolderBase]: 134/294 cut-off events. [2023-11-06 22:12:15,270 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-06 22:12:15,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 294 events. 134/294 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1134 event pairs, 27 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 769. Up to 140 conditions per place. [2023-11-06 22:12:15,274 INFO L140 encePairwiseOnDemand]: 168/178 looper letters, 40 selfloop transitions, 13 changer transitions 0/53 dead transitions. [2023-11-06 22:12:15,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 319 flow [2023-11-06 22:12:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:12:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:12:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-11-06 22:12:15,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730337078651685 [2023-11-06 22:12:15,277 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-11-06 22:12:15,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-11-06 22:12:15,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:15,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-11-06 22:12:15,279 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) [2023-11-06 22:12:15,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:15,281 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:15,282 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 142 flow. Second operand 5 states and 421 transitions. [2023-11-06 22:12:15,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 319 flow [2023-11-06 22:12:15,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:12:15,285 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 242 flow [2023-11-06 22:12:15,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-11-06 22:12:15,286 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2023-11-06 22:12:15,286 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 242 flow [2023-11-06 22:12:15,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.4) internal successors, (387), 5 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:15,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:15,287 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:15,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:12:15,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:15,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1370480310, now seen corresponding path program 1 times [2023-11-06 22:12:15,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:15,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480910251] [2023-11-06 22:12:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:15,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:15,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:15,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480910251] [2023-11-06 22:12:15,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480910251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:15,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926694489] [2023-11-06 22:12:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:15,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:15,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:15,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:15,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:12:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:15,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:12:15,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:12:15,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:12:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:16,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:16,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926694489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:16,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:16,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-06 22:12:16,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101296769] [2023-11-06 22:12:16,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:16,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:12:16,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:16,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:12:16,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:12:17,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 178 [2023-11-06 22:12:17,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 242 flow. Second operand has 15 states, 15 states have (on average 74.0) internal successors, (1110), 15 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:17,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:17,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 178 [2023-11-06 22:12:17,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:17,498 INFO L124 PetriNetUnfolderBase]: 266/558 cut-off events. [2023-11-06 22:12:17,499 INFO L125 PetriNetUnfolderBase]: For 794/794 co-relation queries the response was YES. [2023-11-06 22:12:17,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1796 conditions, 558 events. 266/558 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2094 event pairs, 54 based on Foata normal form. 66/613 useless extension candidates. Maximal degree in co-relation 1775. Up to 202 conditions per place. [2023-11-06 22:12:17,506 INFO L140 encePairwiseOnDemand]: 171/178 looper letters, 90 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2023-11-06 22:12:17,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 98 transitions, 702 flow [2023-11-06 22:12:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:12:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:12:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 656 transitions. [2023-11-06 22:12:17,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606741573033708 [2023-11-06 22:12:17,510 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 656 transitions. [2023-11-06 22:12:17,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 656 transitions. [2023-11-06 22:12:17,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:17,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 656 transitions. [2023-11-06 22:12:17,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:17,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:17,518 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:17,518 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 242 flow. Second operand 8 states and 656 transitions. [2023-11-06 22:12:17,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 98 transitions, 702 flow [2023-11-06 22:12:17,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 98 transitions, 702 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:17,524 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 312 flow [2023-11-06 22:12:17,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=312, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2023-11-06 22:12:17,525 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2023-11-06 22:12:17,525 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 312 flow [2023-11-06 22:12:17,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.0) internal successors, (1110), 15 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:17,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:17,526 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:17,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:17,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:17,733 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:17,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1316754924, now seen corresponding path program 1 times [2023-11-06 22:12:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:17,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16755225] [2023-11-06 22:12:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:17,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:18,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:18,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16755225] [2023-11-06 22:12:18,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16755225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:18,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960882317] [2023-11-06 22:12:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:18,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:18,062 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:18,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:12:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:18,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:12:18,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:18,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:12:18,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:12:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:18,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:18,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960882317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:18,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:18,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-06 22:12:18,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511019354] [2023-11-06 22:12:18,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:18,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:12:18,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:18,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:12:18,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:12:19,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 178 [2023-11-06 22:12:19,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 312 flow. Second operand has 15 states, 15 states have (on average 76.0) internal successors, (1140), 15 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:19,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:19,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 178 [2023-11-06 22:12:19,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:20,050 INFO L124 PetriNetUnfolderBase]: 554/1158 cut-off events. [2023-11-06 22:12:20,050 INFO L125 PetriNetUnfolderBase]: For 2100/2100 co-relation queries the response was YES. [2023-11-06 22:12:20,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4262 conditions, 1158 events. 554/1158 cut-off events. For 2100/2100 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 5239 event pairs, 128 based on Foata normal form. 144/1279 useless extension candidates. Maximal degree in co-relation 4236. Up to 358 conditions per place. [2023-11-06 22:12:20,069 INFO L140 encePairwiseOnDemand]: 172/178 looper letters, 138 selfloop transitions, 16 changer transitions 0/155 dead transitions. [2023-11-06 22:12:20,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 155 transitions, 1386 flow [2023-11-06 22:12:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:12:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:12:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 678 transitions. [2023-11-06 22:12:20,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476123595505618 [2023-11-06 22:12:20,074 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 678 transitions. [2023-11-06 22:12:20,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 678 transitions. [2023-11-06 22:12:20,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:20,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 678 transitions. [2023-11-06 22:12:20,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 84.75) internal successors, (678), 8 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:20,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:20,081 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:20,081 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 312 flow. Second operand 8 states and 678 transitions. [2023-11-06 22:12:20,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 155 transitions, 1386 flow [2023-11-06 22:12:20,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 155 transitions, 1337 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-11-06 22:12:20,094 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 460 flow [2023-11-06 22:12:20,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=460, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2023-11-06 22:12:20,095 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2023-11-06 22:12:20,096 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 460 flow [2023-11-06 22:12:20,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 76.0) internal successors, (1140), 15 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:20,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:20,097 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-06 22:12:20,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:20,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:12:20,303 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:20,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1836945520, now seen corresponding path program 2 times [2023-11-06 22:12:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:20,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184570413] [2023-11-06 22:12:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:20,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:21,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:21,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184570413] [2023-11-06 22:12:21,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184570413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:21,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585842346] [2023-11-06 22:12:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:12:21,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:21,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:21,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:21,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:12:21,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:12:21,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:21,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:12:21,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:21,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:12:21,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:12:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:21,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:22,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585842346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:22,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:22,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-11-06 22:12:22,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726834403] [2023-11-06 22:12:22,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:22,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:12:22,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:12:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:12:24,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 178 [2023-11-06 22:12:24,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 460 flow. Second operand has 25 states, 25 states have (on average 76.64) internal successors, (1916), 25 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:24,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:24,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 178 [2023-11-06 22:12:24,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:25,476 INFO L124 PetriNetUnfolderBase]: 1130/2358 cut-off events. [2023-11-06 22:12:25,476 INFO L125 PetriNetUnfolderBase]: For 6347/6347 co-relation queries the response was YES. [2023-11-06 22:12:25,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9291 conditions, 2358 events. 1130/2358 cut-off events. For 6347/6347 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 11176 event pairs, 128 based on Foata normal form. 288/2599 useless extension candidates. Maximal degree in co-relation 9261. Up to 551 conditions per place. [2023-11-06 22:12:25,504 INFO L140 encePairwiseOnDemand]: 172/178 looper letters, 279 selfloop transitions, 36 changer transitions 0/316 dead transitions. [2023-11-06 22:12:25,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 316 transitions, 2904 flow [2023-11-06 22:12:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:12:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:12:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1288 transitions. [2023-11-06 22:12:25,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48239700374531835 [2023-11-06 22:12:25,567 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1288 transitions. [2023-11-06 22:12:25,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1288 transitions. [2023-11-06 22:12:25,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:25,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1288 transitions. [2023-11-06 22:12:25,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.86666666666666) internal successors, (1288), 15 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:25,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:25,579 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:25,580 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 460 flow. Second operand 15 states and 1288 transitions. [2023-11-06 22:12:25,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 316 transitions, 2904 flow [2023-11-06 22:12:25,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 316 transitions, 2881 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-06 22:12:25,610 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 778 flow [2023-11-06 22:12:25,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=778, PETRI_PLACES=95, PETRI_TRANSITIONS=78} [2023-11-06 22:12:25,613 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2023-11-06 22:12:25,613 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 778 flow [2023-11-06 22:12:25,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 76.64) internal successors, (1916), 25 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:25,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:25,614 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-06 22:12:25,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:25,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:25,820 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:25,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1997757409, now seen corresponding path program 2 times [2023-11-06 22:12:25,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:25,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156270361] [2023-11-06 22:12:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:25,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:26,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:26,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156270361] [2023-11-06 22:12:26,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156270361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527789805] [2023-11-06 22:12:26,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:12:26,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:26,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:26,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:26,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:12:26,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:12:26,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:26,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:12:26,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:26,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:12:26,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:12:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:27,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:27,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527789805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:27,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:27,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-11-06 22:12:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850968417] [2023-11-06 22:12:27,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:27,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:12:27,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:12:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:12:29,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 178 [2023-11-06 22:12:29,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 78 transitions, 778 flow. Second operand has 25 states, 25 states have (on average 74.64) internal successors, (1866), 25 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:29,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:29,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 178 [2023-11-06 22:12:29,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:31,757 INFO L124 PetriNetUnfolderBase]: 2258/4614 cut-off events. [2023-11-06 22:12:31,758 INFO L125 PetriNetUnfolderBase]: For 28603/28603 co-relation queries the response was YES. [2023-11-06 22:12:31,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19269 conditions, 4614 events. 2258/4614 cut-off events. For 28603/28603 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 24640 event pairs, 234 based on Foata normal form. 564/5131 useless extension candidates. Maximal degree in co-relation 19232. Up to 1079 conditions per place. [2023-11-06 22:12:31,820 INFO L140 encePairwiseOnDemand]: 171/178 looper letters, 326 selfloop transitions, 14 changer transitions 0/341 dead transitions. [2023-11-06 22:12:31,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 341 transitions, 4450 flow [2023-11-06 22:12:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:12:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:12:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1242 transitions. [2023-11-06 22:12:31,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4651685393258427 [2023-11-06 22:12:31,828 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1242 transitions. [2023-11-06 22:12:31,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1242 transitions. [2023-11-06 22:12:31,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:31,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1242 transitions. [2023-11-06 22:12:31,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 82.8) internal successors, (1242), 15 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:31,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:31,843 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:31,843 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 778 flow. Second operand 15 states and 1242 transitions. [2023-11-06 22:12:31,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 341 transitions, 4450 flow [2023-11-06 22:12:31,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 341 transitions, 3856 flow, removed 209 selfloop flow, removed 7 redundant places. [2023-11-06 22:12:31,898 INFO L231 Difference]: Finished difference. Result has 109 places, 85 transitions, 810 flow [2023-11-06 22:12:31,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=810, PETRI_PLACES=109, PETRI_TRANSITIONS=85} [2023-11-06 22:12:31,900 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 81 predicate places. [2023-11-06 22:12:31,900 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 85 transitions, 810 flow [2023-11-06 22:12:31,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.64) internal successors, (1866), 25 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:31,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:31,902 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-06 22:12:31,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:12:32,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:32,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:32,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:32,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1614732471, now seen corresponding path program 3 times [2023-11-06 22:12:32,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:32,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85390286] [2023-11-06 22:12:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:32,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:32,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:32,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85390286] [2023-11-06 22:12:32,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85390286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:32,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116248595] [2023-11-06 22:12:32,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:12:32,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:32,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:32,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:32,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:12:32,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:12:32,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:32,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:12:32,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:32,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:12:32,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:12:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-06 22:12:33,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:12:33,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116248595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:33,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:12:33,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-11-06 22:12:33,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949517569] [2023-11-06 22:12:33,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:33,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:12:33,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:33,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:12:33,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:12:33,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 178 [2023-11-06 22:12:33,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 85 transitions, 810 flow. Second operand has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:33,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:33,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 178 [2023-11-06 22:12:33,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:34,686 INFO L124 PetriNetUnfolderBase]: 2211/4520 cut-off events. [2023-11-06 22:12:34,687 INFO L125 PetriNetUnfolderBase]: For 24348/24348 co-relation queries the response was YES. [2023-11-06 22:12:34,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19747 conditions, 4520 events. 2211/4520 cut-off events. For 24348/24348 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 24508 event pairs, 48 based on Foata normal form. 47/4520 useless extension candidates. Maximal degree in co-relation 19703. Up to 2820 conditions per place. [2023-11-06 22:12:34,746 INFO L140 encePairwiseOnDemand]: 172/178 looper letters, 172 selfloop transitions, 18 changer transitions 0/191 dead transitions. [2023-11-06 22:12:34,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 191 transitions, 2232 flow [2023-11-06 22:12:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:12:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:12:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 564 transitions. [2023-11-06 22:12:34,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45264847512038525 [2023-11-06 22:12:34,751 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 564 transitions. [2023-11-06 22:12:34,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 564 transitions. [2023-11-06 22:12:34,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:34,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 564 transitions. [2023-11-06 22:12:34,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.57142857142857) internal successors, (564), 7 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:34,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:34,757 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:34,757 INFO L175 Difference]: Start difference. First operand has 109 places, 85 transitions, 810 flow. Second operand 7 states and 564 transitions. [2023-11-06 22:12:34,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 191 transitions, 2232 flow [2023-11-06 22:12:34,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 191 transitions, 2188 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-11-06 22:12:34,802 INFO L231 Difference]: Finished difference. Result has 107 places, 85 transitions, 786 flow [2023-11-06 22:12:34,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=786, PETRI_PLACES=107, PETRI_TRANSITIONS=85} [2023-11-06 22:12:34,803 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 79 predicate places. [2023-11-06 22:12:34,803 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 85 transitions, 786 flow [2023-11-06 22:12:34,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:34,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:34,804 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-06 22:12:34,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:35,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:35,015 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:35,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1614732478, now seen corresponding path program 1 times [2023-11-06 22:12:35,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:35,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372578631] [2023-11-06 22:12:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:35,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-06 22:12:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:35,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372578631] [2023-11-06 22:12:35,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372578631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:35,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:35,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:12:35,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566190944] [2023-11-06 22:12:35,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:35,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:12:35,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:35,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:12:35,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:12:35,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 178 [2023-11-06 22:12:35,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 85 transitions, 786 flow. Second operand has 4 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:35,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:35,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 178 [2023-11-06 22:12:35,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:36,532 INFO L124 PetriNetUnfolderBase]: 2164/4382 cut-off events. [2023-11-06 22:12:36,532 INFO L125 PetriNetUnfolderBase]: For 20627/20627 co-relation queries the response was YES. [2023-11-06 22:12:36,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19356 conditions, 4382 events. 2164/4382 cut-off events. For 20627/20627 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 23403 event pairs, 2024 based on Foata normal form. 47/4429 useless extension candidates. Maximal degree in co-relation 19312. Up to 4232 conditions per place. [2023-11-06 22:12:36,570 INFO L140 encePairwiseOnDemand]: 174/178 looper letters, 79 selfloop transitions, 4 changer transitions 2/86 dead transitions. [2023-11-06 22:12:36,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 86 transitions, 936 flow [2023-11-06 22:12:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:12:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:12:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 330 transitions. [2023-11-06 22:12:36,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46348314606741575 [2023-11-06 22:12:36,572 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 330 transitions. [2023-11-06 22:12:36,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 330 transitions. [2023-11-06 22:12:36,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:36,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 330 transitions. [2023-11-06 22:12:36,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:36,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:36,576 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:36,576 INFO L175 Difference]: Start difference. First operand has 107 places, 85 transitions, 786 flow. Second operand 4 states and 330 transitions. [2023-11-06 22:12:36,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 86 transitions, 936 flow [2023-11-06 22:12:36,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 86 transitions, 900 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-06 22:12:36,630 INFO L231 Difference]: Finished difference. Result has 103 places, 82 transitions, 684 flow [2023-11-06 22:12:36,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=684, PETRI_PLACES=103, PETRI_TRANSITIONS=82} [2023-11-06 22:12:36,631 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 75 predicate places. [2023-11-06 22:12:36,631 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 82 transitions, 684 flow [2023-11-06 22:12:36,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:36,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:36,631 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-06 22:12:36,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:12:36,632 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:36,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash -423793528, now seen corresponding path program 3 times [2023-11-06 22:12:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:36,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338186300] [2023-11-06 22:12:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:36,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:12:36,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:36,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338186300] [2023-11-06 22:12:36,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338186300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:36,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294672189] [2023-11-06 22:12:36,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:12:36,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:36,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:36,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:36,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:12:37,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:12:37,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:37,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:12:37,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:37,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:12:37,262 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:12:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-06 22:12:37,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:12:37,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294672189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:37,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:12:37,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-11-06 22:12:37,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416069394] [2023-11-06 22:12:37,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:37,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:12:37,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:12:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:12:37,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 178 [2023-11-06 22:12:37,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 82 transitions, 684 flow. Second operand has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:37,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:37,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 178 [2023-11-06 22:12:37,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:38,963 INFO L124 PetriNetUnfolderBase]: 2072/4198 cut-off events. [2023-11-06 22:12:38,963 INFO L125 PetriNetUnfolderBase]: For 12373/12373 co-relation queries the response was YES. [2023-11-06 22:12:38,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16622 conditions, 4198 events. 2072/4198 cut-off events. For 12373/12373 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 22351 event pairs, 45 based on Foata normal form. 46/4244 useless extension candidates. Maximal degree in co-relation 16580. Up to 2780 conditions per place. [2023-11-06 22:12:39,008 INFO L140 encePairwiseOnDemand]: 173/178 looper letters, 117 selfloop transitions, 42 changer transitions 0/160 dead transitions. [2023-11-06 22:12:39,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 160 transitions, 1462 flow [2023-11-06 22:12:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:12:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:12:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 571 transitions. [2023-11-06 22:12:39,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582664526484751 [2023-11-06 22:12:39,014 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 571 transitions. [2023-11-06 22:12:39,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 571 transitions. [2023-11-06 22:12:39,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:39,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 571 transitions. [2023-11-06 22:12:39,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:39,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:39,024 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:39,025 INFO L175 Difference]: Start difference. First operand has 103 places, 82 transitions, 684 flow. Second operand 7 states and 571 transitions. [2023-11-06 22:12:39,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 160 transitions, 1462 flow [2023-11-06 22:12:39,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 160 transitions, 1384 flow, removed 3 selfloop flow, removed 13 redundant places. [2023-11-06 22:12:39,078 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 664 flow [2023-11-06 22:12:39,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=664, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2023-11-06 22:12:39,079 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2023-11-06 22:12:39,080 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 664 flow [2023-11-06 22:12:39,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:39,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:39,080 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:39,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:39,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:12:39,286 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:12:39,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:39,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1890881377, now seen corresponding path program 1 times [2023-11-06 22:12:39,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:39,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520179742] [2023-11-06 22:12:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:39,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-06 22:12:39,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:39,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520179742] [2023-11-06 22:12:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520179742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:39,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706484155] [2023-11-06 22:12:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:39,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:39,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:39,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:39,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:12:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:39,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:12:39,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-06 22:12:40,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-06 22:12:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706484155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:40,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:40,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-11-06 22:12:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436234653] [2023-11-06 22:12:40,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:40,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:12:40,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:12:40,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:12:40,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-11-06 22:12:40,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 664 flow. Second operand has 9 states, 9 states have (on average 73.22222222222223) internal successors, (659), 9 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:40,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:40,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-11-06 22:12:40,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:41,375 INFO L124 PetriNetUnfolderBase]: 2072/4176 cut-off events. [2023-11-06 22:12:41,375 INFO L125 PetriNetUnfolderBase]: For 15464/15464 co-relation queries the response was YES. [2023-11-06 22:12:41,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17559 conditions, 4176 events. 2072/4176 cut-off events. For 15464/15464 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 23105 event pairs, 484 based on Foata normal form. 22/4198 useless extension candidates. Maximal degree in co-relation 17526. Up to 1980 conditions per place. [2023-11-06 22:12:41,397 INFO L140 encePairwiseOnDemand]: 170/178 looper letters, 0 selfloop transitions, 0 changer transitions 119/119 dead transitions. [2023-11-06 22:12:41,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 119 transitions, 1129 flow [2023-11-06 22:12:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:12:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:12:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 524 transitions. [2023-11-06 22:12:41,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420545746388443 [2023-11-06 22:12:41,401 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 524 transitions. [2023-11-06 22:12:41,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 524 transitions. [2023-11-06 22:12:41,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:41,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 524 transitions. [2023-11-06 22:12:41,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.85714285714286) internal successors, (524), 7 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:41,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:41,407 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:41,407 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 664 flow. Second operand 7 states and 524 transitions. [2023-11-06 22:12:41,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 119 transitions, 1129 flow [2023-11-06 22:12:41,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 119 transitions, 1041 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-06 22:12:41,438 INFO L231 Difference]: Finished difference. Result has 92 places, 0 transitions, 0 flow [2023-11-06 22:12:41,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=92, PETRI_TRANSITIONS=0} [2023-11-06 22:12:41,439 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2023-11-06 22:12:41,439 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 0 transitions, 0 flow [2023-11-06 22:12:41,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 73.22222222222223) internal successors, (659), 9 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:41,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-11-06 22:12:41,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-11-06 22:12:41,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2023-11-06 22:12:41,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-11-06 22:12:41,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-11-06 22:12:41,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-11-06 22:12:41,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-11-06 22:12:41,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-11-06 22:12:41,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-11-06 22:12:41,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-11-06 22:12:41,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-11-06 22:12:41,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-11-06 22:12:41,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-11-06 22:12:41,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-11-06 22:12:41,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-11-06 22:12:41,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-11-06 22:12:41,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:41,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:12:41,653 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:41,659 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 22:12:41,659 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:12:41,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:12:41 BasicIcfg [2023-11-06 22:12:41,663 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:12:41,664 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:12:41,664 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:12:41,664 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:12:41,665 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:07" (3/4) ... [2023-11-06 22:12:41,666 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 22:12:41,671 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-11-06 22:12:41,677 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-11-06 22:12:41,678 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-06 22:12:41,678 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 22:12:41,730 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:12:41,730 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 22:12:41,730 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:12:41,731 INFO L158 Benchmark]: Toolchain (without parser) took 35579.02ms. Allocated memory was 153.1MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 105.8MB in the beginning and 444.5MB in the end (delta: -338.7MB). Peak memory consumption was 709.2MB. Max. memory is 16.1GB. [2023-11-06 22:12:41,732 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 123.7MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:12:41,732 INFO L158 Benchmark]: CACSL2BoogieTranslator took 894.11ms. Allocated memory is still 153.1MB. Free memory was 105.8MB in the beginning and 78.1MB in the end (delta: 27.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-06 22:12:41,732 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.30ms. Allocated memory is still 153.1MB. Free memory was 78.1MB in the beginning and 75.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:12:41,733 INFO L158 Benchmark]: Boogie Preprocessor took 45.93ms. Allocated memory is still 153.1MB. Free memory was 75.8MB in the beginning and 73.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:12:41,733 INFO L158 Benchmark]: RCFGBuilder took 476.27ms. Allocated memory is still 153.1MB. Free memory was 73.9MB in the beginning and 115.8MB in the end (delta: -41.8MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2023-11-06 22:12:41,734 INFO L158 Benchmark]: TraceAbstraction took 34028.26ms. Allocated memory was 153.1MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 114.6MB in the beginning and 447.7MB in the end (delta: -333.1MB). Peak memory consumption was 713.3MB. Max. memory is 16.1GB. [2023-11-06 22:12:41,734 INFO L158 Benchmark]: Witness Printer took 66.78ms. Allocated memory is still 1.2GB. Free memory was 447.7MB in the beginning and 444.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:12:41,736 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 123.7MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 894.11ms. Allocated memory is still 153.1MB. Free memory was 105.8MB in the beginning and 78.1MB in the end (delta: 27.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.30ms. Allocated memory is still 153.1MB. Free memory was 78.1MB in the beginning and 75.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.93ms. Allocated memory is still 153.1MB. Free memory was 75.8MB in the beginning and 73.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 476.27ms. Allocated memory is still 153.1MB. Free memory was 73.9MB in the beginning and 115.8MB in the end (delta: -41.8MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * TraceAbstraction took 34028.26ms. Allocated memory was 153.1MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 114.6MB in the beginning and 447.7MB in the end (delta: -333.1MB). Peak memory consumption was 713.3MB. Max. memory is 16.1GB. * Witness Printer took 66.78ms. Allocated memory is still 1.2GB. Free memory was 447.7MB in the beginning and 444.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 86 PlacesBefore, 28 PlacesAfterwards, 88 TransitionsBefore, 27 TransitionsAfterwards, 1960 CoEnabledTransitionPairs, 4 FixpointIterations, 19 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 89 TotalNumberOfCompositions, 2518 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1807, independent: 1736, independent conditional: 0, independent unconditional: 1736, dependent: 71, dependent conditional: 0, dependent unconditional: 71, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1085, independent: 1056, independent conditional: 0, independent unconditional: 1056, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1807, independent: 680, independent conditional: 0, independent unconditional: 680, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 1085, unknown conditional: 0, unknown unconditional: 1085] , Statistics on independence cache: Total cache size (in pairs): 40, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 932]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 112 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 33.9s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 17.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4300 SdHoareTripleChecker+Valid, 8.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3735 mSDsluCounter, 2410 SdHoareTripleChecker+Invalid, 7.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2275 mSDsCounter, 149 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11525 IncrementalHoareTripleChecker+Invalid, 11674 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 149 mSolverCounterUnsat, 135 mSDtfsCounter, 11525 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 583 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=810occurred in iteration=13, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 707 NumberOfCodeBlocks, 627 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 846 ConstructedInterpolants, 44 QuantifiedInterpolants, 8936 SizeOfPredicates, 32 NumberOfNonLiveVariables, 2056 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 34 InterpolantComputations, 10 PerfectInterpolantSequences, 2746/3067 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 22:12:41,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97590394-0858-46ce-b73b-6aec42040289/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE