./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 527bcce2 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_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/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_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --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-527bcce [2023-11-21 21:03:02,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:03:02,636 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 21:03:02,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:03:02,645 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:03:02,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:03:02,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:03:02,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:03:02,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:03:02,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:03:02,696 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:03:02,697 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:03:02,697 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:03:02,699 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:03:02,700 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:03:02,700 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:03:02,701 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:03:02,701 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:03:02,702 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 21:03:02,702 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 21:03:02,703 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 21:03:02,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:03:02,704 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 21:03:02,704 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 21:03:02,705 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:03:02,705 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:03:02,706 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:03:02,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:03:02,707 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:03:02,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:03:02,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:03:02,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:03:02,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:03:02,710 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:03:02,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:03:02,711 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:03:02,711 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:03:02,711 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:03:02,711 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:03:02,712 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_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 [2023-11-21 21:03:03,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:03:03,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:03:03,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:03:03,165 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:03:03,166 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:03:03,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2023-11-21 21:03:06,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:03:06,699 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:03:06,705 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2023-11-21 21:03:06,731 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/data/642741f0c/742fa6c8ac2b42259248a30d0539a1e0/FLAG83a5f03de [2023-11-21 21:03:06,751 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/data/642741f0c/742fa6c8ac2b42259248a30d0539a1e0 [2023-11-21 21:03:06,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:03:06,760 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:03:06,763 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:03:06,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:03:06,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:03:06,770 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:03:06" (1/1) ... [2023-11-21 21:03:06,782 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e3f886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:06, skipping insertion in model container [2023-11-21 21:03:06,782 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:03:06" (1/1) ... [2023-11-21 21:03:06,867 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:03:07,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:03:07,506 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:03:07,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:03:07,647 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:03:07,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07 WrapperNode [2023-11-21 21:03:07,647 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:03:07,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:03:07,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:03:07,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:03:07,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,703 INFO L138 Inliner]: procedures = 263, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-11-21 21:03:07,704 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:03:07,705 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:03:07,705 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:03:07,705 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:03:07,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,723 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,742 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,744 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:03:07,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:03:07,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:03:07,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:03:07,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (1/1) ... [2023-11-21 21:03:07,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:03:07,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:07,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:03:07,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:03:07,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 21:03:07,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:03:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 21:03:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 21:03:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 21:03:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 21:03:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:03:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-21 21:03:07,831 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-21 21:03:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:03:07,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:03:07,833 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 21:03:08,070 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:03:08,075 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:03:08,411 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:03:08,559 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:03:08,561 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 21:03:08,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:03:08 BoogieIcfgContainer [2023-11-21 21:03:08,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:03:08,564 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:03:08,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:03:08,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:03:08,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:03:06" (1/3) ... [2023-11-21 21:03:08,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dabddde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:03:08, skipping insertion in model container [2023-11-21 21:03:08,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:07" (2/3) ... [2023-11-21 21:03:08,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dabddde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:03:08, skipping insertion in model container [2023-11-21 21:03:08,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:03:08" (3/3) ... [2023-11-21 21:03:08,570 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2023-11-21 21:03:08,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:03:08,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-21 21:03:08,591 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 21:03:08,658 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 21:03:08,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 36 transitions, 76 flow [2023-11-21 21:03:08,721 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2023-11-21 21:03:08,722 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:03:08,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 35 events. 3/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2023-11-21 21:03:08,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 36 transitions, 76 flow [2023-11-21 21:03:08,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 35 transitions, 73 flow [2023-11-21 21:03:08,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:03:08,749 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;@147f93e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:03:08,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-21 21:03:08,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 21:03:08,753 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-21 21:03:08,753 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:03:08,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:08,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:03:08,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:08,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 247585, now seen corresponding path program 1 times [2023-11-21 21:03:08,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:08,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998900768] [2023-11-21 21:03:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:08,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:09,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:09,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998900768] [2023-11-21 21:03:09,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998900768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:09,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:03:09,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:03:09,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546973819] [2023-11-21 21:03:09,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:09,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:03:09,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:09,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:03:09,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:03:09,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-21 21:03:09,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:09,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-21 21:03:09,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:09,242 INFO L124 PetriNetUnfolderBase]: 74/209 cut-off events. [2023-11-21 21:03:09,242 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 21:03:09,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 209 events. 74/209 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 933 event pairs, 56 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 345. Up to 149 conditions per place. [2023-11-21 21:03:09,250 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 20 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-21 21:03:09,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 119 flow [2023-11-21 21:03:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:03:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:03:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-21 21:03:09,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-21 21:03:09,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-21 21:03:09,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-21 21:03:09,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:09,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-21 21:03:09,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,286 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 73 flow. Second operand 3 states and 68 transitions. [2023-11-21 21:03:09,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 119 flow [2023-11-21 21:03:09,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:03:09,292 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 84 flow [2023-11-21 21:03:09,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-11-21 21:03:09,299 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-21 21:03:09,299 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 84 flow [2023-11-21 21:03:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:09,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-21 21:03:09,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:03:09,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:09,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:09,302 INFO L85 PathProgramCache]: Analyzing trace with hash 7674193, now seen corresponding path program 1 times [2023-11-21 21:03:09,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:09,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010310742] [2023-11-21 21:03:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:09,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:09,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:09,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010310742] [2023-11-21 21:03:09,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010310742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:09,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028603354] [2023-11-21 21:03:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:09,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:09,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:09,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:09,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:03:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:09,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:03:09,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:09,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:09,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028603354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:09,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:09,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-21 21:03:09,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387919197] [2023-11-21 21:03:09,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:09,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:03:09,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:03:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:03:09,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-21 21:03:09,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:09,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-21 21:03:09,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:09,683 INFO L124 PetriNetUnfolderBase]: 74/212 cut-off events. [2023-11-21 21:03:09,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:03:09,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 212 events. 74/212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 933 event pairs, 56 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 367. Up to 149 conditions per place. [2023-11-21 21:03:09,686 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 20 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-11-21 21:03:09,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 146 flow [2023-11-21 21:03:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:03:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:03:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2023-11-21 21:03:09,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2023-11-21 21:03:09,689 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 118 transitions. [2023-11-21 21:03:09,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 118 transitions. [2023-11-21 21:03:09,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:09,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 118 transitions. [2023-11-21 21:03:09,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,693 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,694 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 84 flow. Second operand 6 states and 118 transitions. [2023-11-21 21:03:09,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 146 flow [2023-11-21 21:03:09,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-21 21:03:09,696 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 116 flow [2023-11-21 21:03:09,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-11-21 21:03:09,698 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-11-21 21:03:09,698 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 116 flow [2023-11-21 21:03:09,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:09,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:09,699 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-21 21:03:09,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:09,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-21 21:03:09,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:09,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash 987681569, now seen corresponding path program 2 times [2023-11-21 21:03:09,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:09,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547220157] [2023-11-21 21:03:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:09,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 21:03:10,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:10,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547220157] [2023-11-21 21:03:10,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547220157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:10,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:03:10,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:03:10,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221795964] [2023-11-21 21:03:10,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:10,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:03:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:03:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:03:10,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-21 21:03:10,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:10,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-21 21:03:10,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:10,258 INFO L124 PetriNetUnfolderBase]: 74/207 cut-off events. [2023-11-21 21:03:10,258 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 21:03:10,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 207 events. 74/207 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 906 event pairs, 42 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 354. Up to 115 conditions per place. [2023-11-21 21:03:10,263 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 32 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-21 21:03:10,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 198 flow [2023-11-21 21:03:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:03:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:03:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-21 21:03:10,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2023-11-21 21:03:10,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-21 21:03:10,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-21 21:03:10,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:10,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-21 21:03:10,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,277 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 116 flow. Second operand 3 states and 70 transitions. [2023-11-21 21:03:10,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 198 flow [2023-11-21 21:03:10,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 184 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-21 21:03:10,282 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 104 flow [2023-11-21 21:03:10,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-11-21 21:03:10,284 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-11-21 21:03:10,284 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 104 flow [2023-11-21 21:03:10,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:10,285 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-21 21:03:10,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 21:03:10,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:10,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash 987681570, now seen corresponding path program 1 times [2023-11-21 21:03:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:10,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727806747] [2023-11-21 21:03:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:10,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:10,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727806747] [2023-11-21 21:03:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727806747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370118602] [2023-11-21 21:03:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:10,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:10,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:10,465 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:10,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:03:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:10,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 21:03:10,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:10,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:10,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370118602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:10,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:10,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-21 21:03:10,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402562159] [2023-11-21 21:03:10,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:10,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 21:03:10,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 21:03:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:03:10,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-21 21:03:10,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 104 flow. Second operand has 12 states, 12 states have (on average 16.0) internal successors, (192), 12 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:10,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-21 21:03:10,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:10,813 INFO L124 PetriNetUnfolderBase]: 74/217 cut-off events. [2023-11-21 21:03:10,813 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-21 21:03:10,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 217 events. 74/217 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 922 event pairs, 56 based on Foata normal form. 6/190 useless extension candidates. Maximal degree in co-relation 366. Up to 149 conditions per place. [2023-11-21 21:03:10,818 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 20 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2023-11-21 21:03:10,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 44 transitions, 202 flow [2023-11-21 21:03:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 21:03:10,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 21:03:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2023-11-21 21:03:10,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2023-11-21 21:03:10,823 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 217 transitions. [2023-11-21 21:03:10,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 217 transitions. [2023-11-21 21:03:10,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:10,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 217 transitions. [2023-11-21 21:03:10,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,830 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,830 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 104 flow. Second operand 12 states and 217 transitions. [2023-11-21 21:03:10,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 44 transitions, 202 flow [2023-11-21 21:03:10,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:03:10,837 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 184 flow [2023-11-21 21:03:10,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-11-21 21:03:10,840 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-11-21 21:03:10,840 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 184 flow [2023-11-21 21:03:10,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.0) internal successors, (192), 12 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:10,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:10,842 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-21 21:03:10,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:11,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:11,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:11,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash 869803298, now seen corresponding path program 2 times [2023-11-21 21:03:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:11,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557493455] [2023-11-21 21:03:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:11,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:11,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557493455] [2023-11-21 21:03:11,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557493455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:11,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:03:11,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:03:11,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776537181] [2023-11-21 21:03:11,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:11,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:03:11,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:11,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:03:11,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:03:11,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2023-11-21 21:03:11,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:11,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2023-11-21 21:03:11,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:11,338 INFO L124 PetriNetUnfolderBase]: 74/212 cut-off events. [2023-11-21 21:03:11,339 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-21 21:03:11,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 212 events. 74/212 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 905 event pairs, 42 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 358. Up to 114 conditions per place. [2023-11-21 21:03:11,342 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 37 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-11-21 21:03:11,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 276 flow [2023-11-21 21:03:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:03:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:03:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2023-11-21 21:03:11,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-21 21:03:11,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2023-11-21 21:03:11,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2023-11-21 21:03:11,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:11,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2023-11-21 21:03:11,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,346 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,346 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 184 flow. Second operand 3 states and 72 transitions. [2023-11-21 21:03:11,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 276 flow [2023-11-21 21:03:11,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 228 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-21 21:03:11,353 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 138 flow [2023-11-21 21:03:11,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-11-21 21:03:11,354 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-11-21 21:03:11,354 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 138 flow [2023-11-21 21:03:11,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:11,355 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:11,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 21:03:11,355 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)] === [2023-11-21 21:03:11,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1821286882, now seen corresponding path program 1 times [2023-11-21 21:03:11,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:11,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750396259] [2023-11-21 21:03:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750396259] [2023-11-21 21:03:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750396259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:11,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:03:11,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:03:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791084993] [2023-11-21 21:03:11,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:03:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:03:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:03:11,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-21 21:03:11,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:11,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-21 21:03:11,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:11,571 INFO L124 PetriNetUnfolderBase]: 122/353 cut-off events. [2023-11-21 21:03:11,571 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-11-21 21:03:11,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 353 events. 122/353 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1584 event pairs, 56 based on Foata normal form. 8/310 useless extension candidates. Maximal degree in co-relation 604. Up to 159 conditions per place. [2023-11-21 21:03:11,576 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 43 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-21 21:03:11,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 256 flow [2023-11-21 21:03:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:03:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:03:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2023-11-21 21:03:11,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-11-21 21:03:11,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 81 transitions. [2023-11-21 21:03:11,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 81 transitions. [2023-11-21 21:03:11,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:11,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 81 transitions. [2023-11-21 21:03:11,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,581 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 138 flow. Second operand 3 states and 81 transitions. [2023-11-21 21:03:11,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 256 flow [2023-11-21 21:03:11,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:03:11,586 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 146 flow [2023-11-21 21:03:11,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2023-11-21 21:03:11,590 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2023-11-21 21:03:11,590 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 146 flow [2023-11-21 21:03:11,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:11,591 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:11,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 21:03:11,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:11,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2089935274, now seen corresponding path program 1 times [2023-11-21 21:03:11,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:11,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479315081] [2023-11-21 21:03:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:11,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:11,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479315081] [2023-11-21 21:03:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479315081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:11,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:03:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:03:11,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187240020] [2023-11-21 21:03:11,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:11,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:03:11,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:03:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:03:11,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2023-11-21 21:03:11,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:11,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:11,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2023-11-21 21:03:11,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:12,040 INFO L124 PetriNetUnfolderBase]: 122/326 cut-off events. [2023-11-21 21:03:12,041 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-21 21:03:12,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 326 events. 122/326 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1368 event pairs, 14 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 608. Up to 160 conditions per place. [2023-11-21 21:03:12,045 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 42 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2023-11-21 21:03:12,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 270 flow [2023-11-21 21:03:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:03:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 21:03:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2023-11-21 21:03:12,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-21 21:03:12,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 99 transitions. [2023-11-21 21:03:12,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 99 transitions. [2023-11-21 21:03:12,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:12,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 99 transitions. [2023-11-21 21:03:12,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:12,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:12,051 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:12,051 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 146 flow. Second operand 5 states and 99 transitions. [2023-11-21 21:03:12,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 270 flow [2023-11-21 21:03:12,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:03:12,056 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 152 flow [2023-11-21 21:03:12,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-11-21 21:03:12,057 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2023-11-21 21:03:12,058 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 152 flow [2023-11-21 21:03:12,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:12,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:12,058 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:12,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 21:03:12,059 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:12,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2089935275, now seen corresponding path program 1 times [2023-11-21 21:03:12,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:12,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424313428] [2023-11-21 21:03:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424313428] [2023-11-21 21:03:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424313428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:12,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:03:12,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 21:03:12,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138738633] [2023-11-21 21:03:12,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:12,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 21:03:12,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 21:03:12,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:03:12,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-21 21:03:12,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:12,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:12,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-21 21:03:12,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:12,718 INFO L124 PetriNetUnfolderBase]: 138/321 cut-off events. [2023-11-21 21:03:12,718 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-21 21:03:12,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 321 events. 138/321 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1180 event pairs, 46 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 668. Up to 146 conditions per place. [2023-11-21 21:03:12,722 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 57 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2023-11-21 21:03:12,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 338 flow [2023-11-21 21:03:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:03:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:03:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2023-11-21 21:03:12,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2023-11-21 21:03:12,724 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 133 transitions. [2023-11-21 21:03:12,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 133 transitions. [2023-11-21 21:03:12,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:12,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 133 transitions. [2023-11-21 21:03:12,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:12,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:12,727 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:12,727 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 152 flow. Second operand 6 states and 133 transitions. [2023-11-21 21:03:12,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 338 flow [2023-11-21 21:03:12,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 21:03:12,734 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 164 flow [2023-11-21 21:03:12,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-11-21 21:03:12,738 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2023-11-21 21:03:12,738 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 164 flow [2023-11-21 21:03:12,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:12,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:12,739 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:12,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 21:03:12,739 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:12,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2103030550, now seen corresponding path program 1 times [2023-11-21 21:03:12,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:12,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003600778] [2023-11-21 21:03:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:12,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:13,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:13,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003600778] [2023-11-21 21:03:13,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003600778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:13,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:03:13,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 21:03:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146401917] [2023-11-21 21:03:13,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:13,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 21:03:13,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 21:03:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:03:13,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-21 21:03:13,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:13,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-21 21:03:13,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:13,470 INFO L124 PetriNetUnfolderBase]: 242/603 cut-off events. [2023-11-21 21:03:13,470 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-11-21 21:03:13,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1325 conditions, 603 events. 242/603 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2959 event pairs, 108 based on Foata normal form. 0/558 useless extension candidates. Maximal degree in co-relation 1270. Up to 262 conditions per place. [2023-11-21 21:03:13,477 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 68 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2023-11-21 21:03:13,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 454 flow [2023-11-21 21:03:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 21:03:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 21:03:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2023-11-21 21:03:13,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6006944444444444 [2023-11-21 21:03:13,479 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 173 transitions. [2023-11-21 21:03:13,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 173 transitions. [2023-11-21 21:03:13,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:13,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 173 transitions. [2023-11-21 21:03:13,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 36.0) internal successors, (324), 9 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,482 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 36.0) internal successors, (324), 9 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,482 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 164 flow. Second operand 8 states and 173 transitions. [2023-11-21 21:03:13,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 454 flow [2023-11-21 21:03:13,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 21:03:13,487 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 232 flow [2023-11-21 21:03:13,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-11-21 21:03:13,488 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2023-11-21 21:03:13,488 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 232 flow [2023-11-21 21:03:13,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:13,489 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:13,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 21:03:13,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:13,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:13,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2103030549, now seen corresponding path program 1 times [2023-11-21 21:03:13,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:13,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724129480] [2023-11-21 21:03:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724129480] [2023-11-21 21:03:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724129480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:13,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:03:13,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:03:13,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059273235] [2023-11-21 21:03:13,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:13,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:03:13,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:13,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:03:13,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:03:13,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2023-11-21 21:03:13,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:13,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2023-11-21 21:03:13,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:13,922 INFO L124 PetriNetUnfolderBase]: 226/566 cut-off events. [2023-11-21 21:03:13,922 INFO L125 PetriNetUnfolderBase]: For 462/462 co-relation queries the response was YES. [2023-11-21 21:03:13,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 566 events. 226/566 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2761 event pairs, 40 based on Foata normal form. 0/543 useless extension candidates. Maximal degree in co-relation 1419. Up to 260 conditions per place. [2023-11-21 21:03:13,931 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 50 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2023-11-21 21:03:13,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 452 flow [2023-11-21 21:03:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:03:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:03:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2023-11-21 21:03:13,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2023-11-21 21:03:13,933 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 121 transitions. [2023-11-21 21:03:13,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 121 transitions. [2023-11-21 21:03:13,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:13,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 121 transitions. [2023-11-21 21:03:13,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,936 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,936 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 232 flow. Second operand 6 states and 121 transitions. [2023-11-21 21:03:13,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 452 flow [2023-11-21 21:03:13,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:03:13,942 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 337 flow [2023-11-21 21:03:13,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-11-21 21:03:13,943 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2023-11-21 21:03:13,944 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 337 flow [2023-11-21 21:03:13,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:13,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:13,944 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:13,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 21:03:13,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:13,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:13,945 INFO L85 PathProgramCache]: Analyzing trace with hash -626274365, now seen corresponding path program 1 times [2023-11-21 21:03:13,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:13,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447980502] [2023-11-21 21:03:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:13,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:14,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447980502] [2023-11-21 21:03:14,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447980502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:14,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864434309] [2023-11-21 21:03:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:14,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:14,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:14,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:14,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:03:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:14,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:03:14,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:14,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864434309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:14,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:14,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-21 21:03:14,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117360946] [2023-11-21 21:03:14,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:14,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 21:03:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 21:03:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:03:14,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-21 21:03:14,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:14,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:14,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-21 21:03:14,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:14,580 INFO L124 PetriNetUnfolderBase]: 404/997 cut-off events. [2023-11-21 21:03:14,581 INFO L125 PetriNetUnfolderBase]: For 1608/1608 co-relation queries the response was YES. [2023-11-21 21:03:14,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2854 conditions, 997 events. 404/997 cut-off events. For 1608/1608 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4643 event pairs, 69 based on Foata normal form. 42/1039 useless extension candidates. Maximal degree in co-relation 2791. Up to 182 conditions per place. [2023-11-21 21:03:14,595 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 98 selfloop transitions, 6 changer transitions 0/114 dead transitions. [2023-11-21 21:03:14,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 821 flow [2023-11-21 21:03:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:03:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:03:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2023-11-21 21:03:14,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2023-11-21 21:03:14,598 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 165 transitions. [2023-11-21 21:03:14,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 165 transitions. [2023-11-21 21:03:14,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:14,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 165 transitions. [2023-11-21 21:03:14,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:14,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:14,600 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:14,600 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 337 flow. Second operand 6 states and 165 transitions. [2023-11-21 21:03:14,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 821 flow [2023-11-21 21:03:14,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 114 transitions, 820 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:03:14,610 INFO L231 Difference]: Finished difference. Result has 84 places, 60 transitions, 396 flow [2023-11-21 21:03:14,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=84, PETRI_TRANSITIONS=60} [2023-11-21 21:03:14,612 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2023-11-21 21:03:14,612 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 60 transitions, 396 flow [2023-11-21 21:03:14,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:14,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:14,612 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:14,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:14,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:14,834 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)] === [2023-11-21 21:03:14,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:14,834 INFO L85 PathProgramCache]: Analyzing trace with hash -520403365, now seen corresponding path program 1 times [2023-11-21 21:03:14,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:14,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382702923] [2023-11-21 21:03:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:15,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:15,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382702923] [2023-11-21 21:03:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382702923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520862573] [2023-11-21 21:03:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:15,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:15,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:15,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 21:03:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:15,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 21:03:15,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:15,615 INFO L378 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 [2023-11-21 21:03:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:15,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:16,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520862573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:16,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:16,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-21 21:03:16,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434219194] [2023-11-21 21:03:16,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:16,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 21:03:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 21:03:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-21 21:03:16,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-21 21:03:16,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 60 transitions, 396 flow. Second operand has 20 states, 20 states have (on average 15.15) internal successors, (303), 20 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:16,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:16,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-21 21:03:16,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:18,206 INFO L124 PetriNetUnfolderBase]: 952/2144 cut-off events. [2023-11-21 21:03:18,206 INFO L125 PetriNetUnfolderBase]: For 4668/4672 co-relation queries the response was YES. [2023-11-21 21:03:18,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6779 conditions, 2144 events. 952/2144 cut-off events. For 4668/4672 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 11199 event pairs, 117 based on Foata normal form. 294/2438 useless extension candidates. Maximal degree in co-relation 6713. Up to 314 conditions per place. [2023-11-21 21:03:18,231 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 195 selfloop transitions, 41 changer transitions 0/244 dead transitions. [2023-11-21 21:03:18,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 244 transitions, 1932 flow [2023-11-21 21:03:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 21:03:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-21 21:03:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 466 transitions. [2023-11-21 21:03:18,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5883838383838383 [2023-11-21 21:03:18,234 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 466 transitions. [2023-11-21 21:03:18,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 466 transitions. [2023-11-21 21:03:18,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:18,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 466 transitions. [2023-11-21 21:03:18,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 21.181818181818183) internal successors, (466), 22 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:18,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:18,241 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:18,241 INFO L175 Difference]: Start difference. First operand has 84 places, 60 transitions, 396 flow. Second operand 22 states and 466 transitions. [2023-11-21 21:03:18,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 244 transitions, 1932 flow [2023-11-21 21:03:18,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 244 transitions, 1832 flow, removed 40 selfloop flow, removed 1 redundant places. [2023-11-21 21:03:18,265 INFO L231 Difference]: Finished difference. Result has 117 places, 84 transitions, 824 flow [2023-11-21 21:03:18,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=824, PETRI_PLACES=117, PETRI_TRANSITIONS=84} [2023-11-21 21:03:18,266 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 81 predicate places. [2023-11-21 21:03:18,266 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 84 transitions, 824 flow [2023-11-21 21:03:18,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.15) internal successors, (303), 20 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:18,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:18,267 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:18,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:18,481 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)] === [2023-11-21 21:03:18,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash -554271216, now seen corresponding path program 1 times [2023-11-21 21:03:18,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:18,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902523962] [2023-11-21 21:03:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:18,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:18,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902523962] [2023-11-21 21:03:18,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902523962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:18,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634990453] [2023-11-21 21:03:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:18,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:18,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:18,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:18,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 21:03:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:19,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 21:03:19,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:19,222 INFO L378 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 [2023-11-21 21:03:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:19,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:19,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634990453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:19,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:19,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-21 21:03:19,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117525985] [2023-11-21 21:03:19,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:19,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 21:03:19,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:19,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 21:03:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-21 21:03:20,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-21 21:03:20,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 84 transitions, 824 flow. Second operand has 20 states, 20 states have (on average 15.15) internal successors, (303), 20 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:20,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:20,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-21 21:03:20,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:21,514 INFO L124 PetriNetUnfolderBase]: 1115/2494 cut-off events. [2023-11-21 21:03:21,514 INFO L125 PetriNetUnfolderBase]: For 10262/10262 co-relation queries the response was YES. [2023-11-21 21:03:21,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8869 conditions, 2494 events. 1115/2494 cut-off events. For 10262/10262 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 13599 event pairs, 121 based on Foata normal form. 224/2718 useless extension candidates. Maximal degree in co-relation 8787. Up to 372 conditions per place. [2023-11-21 21:03:21,545 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 229 selfloop transitions, 24 changer transitions 0/260 dead transitions. [2023-11-21 21:03:21,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 260 transitions, 2958 flow [2023-11-21 21:03:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 21:03:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-21 21:03:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 302 transitions. [2023-11-21 21:03:21,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6452991452991453 [2023-11-21 21:03:21,548 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 302 transitions. [2023-11-21 21:03:21,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 302 transitions. [2023-11-21 21:03:21,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:21,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 302 transitions. [2023-11-21 21:03:21,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 23.23076923076923) internal successors, (302), 13 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:21,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 36.0) internal successors, (504), 14 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:21,551 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 36.0) internal successors, (504), 14 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:21,552 INFO L175 Difference]: Start difference. First operand has 117 places, 84 transitions, 824 flow. Second operand 13 states and 302 transitions. [2023-11-21 21:03:21,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 260 transitions, 2958 flow [2023-11-21 21:03:21,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 260 transitions, 2496 flow, removed 183 selfloop flow, removed 8 redundant places. [2023-11-21 21:03:21,596 INFO L231 Difference]: Finished difference. Result has 124 places, 87 transitions, 780 flow [2023-11-21 21:03:21,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=780, PETRI_PLACES=124, PETRI_TRANSITIONS=87} [2023-11-21 21:03:21,598 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 88 predicate places. [2023-11-21 21:03:21,598 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 87 transitions, 780 flow [2023-11-21 21:03:21,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.15) internal successors, (303), 20 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:21,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:21,599 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:21,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:21,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 21:03:21,820 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:21,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:21,821 INFO L85 PathProgramCache]: Analyzing trace with hash 835047134, now seen corresponding path program 2 times [2023-11-21 21:03:21,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:21,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720241438] [2023-11-21 21:03:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:21,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:21,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:21,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720241438] [2023-11-21 21:03:21,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720241438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:21,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837457904] [2023-11-21 21:03:21,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:03:21,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:21,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:21,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:22,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 21:03:22,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 21:03:22,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:03:22,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 21:03:22,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-21 21:03:22,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:03:22,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837457904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:22,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:03:22,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-11-21 21:03:22,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311073225] [2023-11-21 21:03:22,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:22,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:03:22,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:03:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:03:22,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2023-11-21 21:03:22,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 87 transitions, 780 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:22,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:22,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2023-11-21 21:03:22,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:23,003 INFO L124 PetriNetUnfolderBase]: 1083/2447 cut-off events. [2023-11-21 21:03:23,003 INFO L125 PetriNetUnfolderBase]: For 7954/7954 co-relation queries the response was YES. [2023-11-21 21:03:23,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8957 conditions, 2447 events. 1083/2447 cut-off events. For 7954/7954 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 13501 event pairs, 955 based on Foata normal form. 0/2446 useless extension candidates. Maximal degree in co-relation 8872. Up to 1986 conditions per place. [2023-11-21 21:03:23,036 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 70 selfloop transitions, 13 changer transitions 1/91 dead transitions. [2023-11-21 21:03:23,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 91 transitions, 980 flow [2023-11-21 21:03:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:03:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 21:03:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2023-11-21 21:03:23,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2023-11-21 21:03:23,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 86 transitions. [2023-11-21 21:03:23,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 86 transitions. [2023-11-21 21:03:23,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:23,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 86 transitions. [2023-11-21 21:03:23,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:23,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:23,040 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:23,040 INFO L175 Difference]: Start difference. First operand has 124 places, 87 transitions, 780 flow. Second operand 4 states and 86 transitions. [2023-11-21 21:03:23,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 91 transitions, 980 flow [2023-11-21 21:03:23,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 91 transitions, 874 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-11-21 21:03:23,138 INFO L231 Difference]: Finished difference. Result has 114 places, 86 transitions, 698 flow [2023-11-21 21:03:23,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=698, PETRI_PLACES=114, PETRI_TRANSITIONS=86} [2023-11-21 21:03:23,140 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 78 predicate places. [2023-11-21 21:03:23,140 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 86 transitions, 698 flow [2023-11-21 21:03:23,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:23,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:23,141 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:23,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:23,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:23,360 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:23,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1242891306, now seen corresponding path program 2 times [2023-11-21 21:03:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:23,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738831887] [2023-11-21 21:03:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:24,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738831887] [2023-11-21 21:03:24,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738831887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528983668] [2023-11-21 21:03:24,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:03:24,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:24,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:24,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:24,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 21:03:24,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 21:03:24,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:03:24,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 21:03:24,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:24,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:24,410 INFO L378 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 [2023-11-21 21:03:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:24,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:25,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528983668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:25,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:25,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2023-11-21 21:03:25,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614391877] [2023-11-21 21:03:25,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:25,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 21:03:25,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:25,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 21:03:25,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2023-11-21 21:03:26,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-21 21:03:26,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 86 transitions, 698 flow. Second operand has 31 states, 31 states have (on average 16.129032258064516) internal successors, (500), 31 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:26,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:26,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-21 21:03:26,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:28,900 INFO L124 PetriNetUnfolderBase]: 1286/2829 cut-off events. [2023-11-21 21:03:28,901 INFO L125 PetriNetUnfolderBase]: For 8646/8651 co-relation queries the response was YES. [2023-11-21 21:03:28,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9301 conditions, 2829 events. 1286/2829 cut-off events. For 8646/8651 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 15299 event pairs, 18 based on Foata normal form. 103/2932 useless extension candidates. Maximal degree in co-relation 9219. Up to 372 conditions per place. [2023-11-21 21:03:28,934 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 257 selfloop transitions, 23 changer transitions 64/350 dead transitions. [2023-11-21 21:03:28,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 350 transitions, 2648 flow [2023-11-21 21:03:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-21 21:03:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-21 21:03:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 567 transitions. [2023-11-21 21:03:28,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-11-21 21:03:28,939 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 567 transitions. [2023-11-21 21:03:28,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 567 transitions. [2023-11-21 21:03:28,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:28,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 567 transitions. [2023-11-21 21:03:28,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 20.25) internal successors, (567), 28 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:28,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:28,945 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:28,946 INFO L175 Difference]: Start difference. First operand has 114 places, 86 transitions, 698 flow. Second operand 28 states and 567 transitions. [2023-11-21 21:03:28,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 350 transitions, 2648 flow [2023-11-21 21:03:29,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 350 transitions, 2586 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-21 21:03:29,010 INFO L231 Difference]: Finished difference. Result has 131 places, 64 transitions, 494 flow [2023-11-21 21:03:29,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=494, PETRI_PLACES=131, PETRI_TRANSITIONS=64} [2023-11-21 21:03:29,011 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 95 predicate places. [2023-11-21 21:03:29,011 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 64 transitions, 494 flow [2023-11-21 21:03:29,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 16.129032258064516) internal successors, (500), 31 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:29,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:29,012 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:29,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:29,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:29,229 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:29,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash -678616469, now seen corresponding path program 2 times [2023-11-21 21:03:29,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:29,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830832736] [2023-11-21 21:03:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:29,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:30,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:30,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830832736] [2023-11-21 21:03:30,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830832736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:30,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043011761] [2023-11-21 21:03:30,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:03:30,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:30,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:30,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:30,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 21:03:30,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 21:03:30,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:03:30,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 21:03:30,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:30,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:30,293 INFO L378 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 [2023-11-21 21:03:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:30,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:31,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043011761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:31,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:31,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2023-11-21 21:03:31,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653525804] [2023-11-21 21:03:31,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:31,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 21:03:31,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:31,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 21:03:31,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2023-11-21 21:03:32,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-21 21:03:32,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 64 transitions, 494 flow. Second operand has 31 states, 31 states have (on average 16.129032258064516) internal successors, (500), 31 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:32,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:32,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-21 21:03:32,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:34,695 INFO L124 PetriNetUnfolderBase]: 1432/3157 cut-off events. [2023-11-21 21:03:34,695 INFO L125 PetriNetUnfolderBase]: For 10519/10519 co-relation queries the response was YES. [2023-11-21 21:03:34,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10667 conditions, 3157 events. 1432/3157 cut-off events. For 10519/10519 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 17368 event pairs, 0 based on Foata normal form. 106/3263 useless extension candidates. Maximal degree in co-relation 10595. Up to 380 conditions per place. [2023-11-21 21:03:34,739 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 272 selfloop transitions, 24 changer transitions 15/316 dead transitions. [2023-11-21 21:03:34,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 316 transitions, 3320 flow [2023-11-21 21:03:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 21:03:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-21 21:03:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 375 transitions. [2023-11-21 21:03:34,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2023-11-21 21:03:34,742 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 375 transitions. [2023-11-21 21:03:34,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 375 transitions. [2023-11-21 21:03:34,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:34,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 375 transitions. [2023-11-21 21:03:34,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 22.058823529411764) internal successors, (375), 17 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:34,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:34,747 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:34,748 INFO L175 Difference]: Start difference. First operand has 131 places, 64 transitions, 494 flow. Second operand 17 states and 375 transitions. [2023-11-21 21:03:34,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 316 transitions, 3320 flow [2023-11-21 21:03:34,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 316 transitions, 2454 flow, removed 145 selfloop flow, removed 26 redundant places. [2023-11-21 21:03:34,772 INFO L231 Difference]: Finished difference. Result has 109 places, 64 transitions, 421 flow [2023-11-21 21:03:34,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=421, PETRI_PLACES=109, PETRI_TRANSITIONS=64} [2023-11-21 21:03:34,773 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 73 predicate places. [2023-11-21 21:03:34,774 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 64 transitions, 421 flow [2023-11-21 21:03:34,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 16.129032258064516) internal successors, (500), 31 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:34,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:34,775 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:34,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:34,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:34,989 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)] === [2023-11-21 21:03:34,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1298821355, now seen corresponding path program 1 times [2023-11-21 21:03:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:34,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092475564] [2023-11-21 21:03:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:34,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:35,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092475564] [2023-11-21 21:03:35,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092475564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:35,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284813190] [2023-11-21 21:03:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:35,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:35,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:35,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:35,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 21:03:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:35,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 21:03:35,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:35,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:03:35,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284813190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:35,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:35,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-21 21:03:35,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475253342] [2023-11-21 21:03:35,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:35,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 21:03:35,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 21:03:35,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:03:35,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-21 21:03:35,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 64 transitions, 421 flow. Second operand has 13 states, 13 states have (on average 20.53846153846154) internal successors, (267), 13 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:35,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:35,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-21 21:03:35,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:36,671 INFO L124 PetriNetUnfolderBase]: 2320/5059 cut-off events. [2023-11-21 21:03:36,671 INFO L125 PetriNetUnfolderBase]: For 6707/6707 co-relation queries the response was YES. [2023-11-21 21:03:36,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15452 conditions, 5059 events. 2320/5059 cut-off events. For 6707/6707 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 28302 event pairs, 140 based on Foata normal form. 150/5209 useless extension candidates. Maximal degree in co-relation 15389. Up to 622 conditions per place. [2023-11-21 21:03:36,714 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 271 selfloop transitions, 12 changer transitions 0/288 dead transitions. [2023-11-21 21:03:36,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 288 transitions, 2184 flow [2023-11-21 21:03:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 21:03:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 21:03:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 330 transitions. [2023-11-21 21:03:36,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2023-11-21 21:03:36,716 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 330 transitions. [2023-11-21 21:03:36,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 330 transitions. [2023-11-21 21:03:36,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:36,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 330 transitions. [2023-11-21 21:03:36,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 27.5) internal successors, (330), 12 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) [2023-11-21 21:03:36,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:36,719 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:36,719 INFO L175 Difference]: Start difference. First operand has 109 places, 64 transitions, 421 flow. Second operand 12 states and 330 transitions. [2023-11-21 21:03:36,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 288 transitions, 2184 flow [2023-11-21 21:03:36,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 288 transitions, 1802 flow, removed 19 selfloop flow, removed 21 redundant places. [2023-11-21 21:03:36,741 INFO L231 Difference]: Finished difference. Result has 104 places, 69 transitions, 463 flow [2023-11-21 21:03:36,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=463, PETRI_PLACES=104, PETRI_TRANSITIONS=69} [2023-11-21 21:03:36,742 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 68 predicate places. [2023-11-21 21:03:36,742 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 69 transitions, 463 flow [2023-11-21 21:03:36,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.53846153846154) internal successors, (267), 13 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:36,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:36,743 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:36,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:36,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 21:03:36,957 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:36,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:36,957 INFO L85 PathProgramCache]: Analyzing trace with hash -743416920, now seen corresponding path program 2 times [2023-11-21 21:03:36,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:36,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679041558] [2023-11-21 21:03:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:36,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-11-21 21:03:37,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:37,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679041558] [2023-11-21 21:03:37,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679041558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:37,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831713890] [2023-11-21 21:03:37,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:03:37,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:37,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:37,504 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:37,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 21:03:37,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 21:03:37,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:03:37,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 21:03:37,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:38,225 INFO L378 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 [2023-11-21 21:03:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2023-11-21 21:03:38,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:38,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:03:38,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-21 21:03:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2023-11-21 21:03:38,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831713890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:38,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:38,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-21 21:03:38,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693759579] [2023-11-21 21:03:38,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:38,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 21:03:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 21:03:38,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-21 21:03:38,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2023-11-21 21:03:38,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 69 transitions, 463 flow. Second operand has 16 states, 16 states have (on average 12.875) internal successors, (206), 16 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:38,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:38,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2023-11-21 21:03:38,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:40,501 INFO L124 PetriNetUnfolderBase]: 4096/8777 cut-off events. [2023-11-21 21:03:40,501 INFO L125 PetriNetUnfolderBase]: For 11414/11414 co-relation queries the response was YES. [2023-11-21 21:03:40,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25155 conditions, 8777 events. 4096/8777 cut-off events. For 11414/11414 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 56424 event pairs, 30 based on Foata normal form. 24/8801 useless extension candidates. Maximal degree in co-relation 25095. Up to 2880 conditions per place. [2023-11-21 21:03:40,538 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 52 selfloop transitions, 70 changer transitions 85/210 dead transitions. [2023-11-21 21:03:40,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 210 transitions, 1720 flow [2023-11-21 21:03:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 21:03:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-21 21:03:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 221 transitions. [2023-11-21 21:03:40,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384920634920635 [2023-11-21 21:03:40,540 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 221 transitions. [2023-11-21 21:03:40,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 221 transitions. [2023-11-21 21:03:40,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:40,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 221 transitions. [2023-11-21 21:03:40,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.785714285714286) internal successors, (221), 14 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:40,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 36.0) internal successors, (540), 15 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:40,544 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 36.0) internal successors, (540), 15 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:40,544 INFO L175 Difference]: Start difference. First operand has 104 places, 69 transitions, 463 flow. Second operand 14 states and 221 transitions. [2023-11-21 21:03:40,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 210 transitions, 1720 flow [2023-11-21 21:03:40,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 1691 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-21 21:03:40,587 INFO L231 Difference]: Finished difference. Result has 117 places, 104 transitions, 936 flow [2023-11-21 21:03:40,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=936, PETRI_PLACES=117, PETRI_TRANSITIONS=104} [2023-11-21 21:03:40,588 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 81 predicate places. [2023-11-21 21:03:40,588 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 104 transitions, 936 flow [2023-11-21 21:03:40,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.875) internal successors, (206), 16 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:40,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:40,589 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:40,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:40,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 21:03:40,804 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 21:03:40,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:40,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1191189720, now seen corresponding path program 3 times [2023-11-21 21:03:40,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:40,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360774001] [2023-11-21 21:03:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:40,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-11-21 21:03:41,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:41,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360774001] [2023-11-21 21:03:41,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360774001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:41,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639838434] [2023-11-21 21:03:41,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 21:03:41,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:41,326 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:41,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 21:03:41,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-21 21:03:41,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:03:41,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 21:03:41,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:41,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:41,640 INFO L378 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 [2023-11-21 21:03:42,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:42,064 INFO L378 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 [2023-11-21 21:03:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2023-11-21 21:03:42,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:03:42,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639838434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:42,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:03:42,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-11-21 21:03:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203402797] [2023-11-21 21:03:42,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:42,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:03:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:03:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:03:42,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-21 21:03:42,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 104 transitions, 936 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:42,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:42,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-21 21:03:42,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:42,957 INFO L124 PetriNetUnfolderBase]: 1624/4193 cut-off events. [2023-11-21 21:03:42,957 INFO L125 PetriNetUnfolderBase]: For 8189/8191 co-relation queries the response was YES. [2023-11-21 21:03:42,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14059 conditions, 4193 events. 1624/4193 cut-off events. For 8189/8191 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 25915 event pairs, 1202 based on Foata normal form. 24/4217 useless extension candidates. Maximal degree in co-relation 14030. Up to 3372 conditions per place. [2023-11-21 21:03:42,973 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 0 selfloop transitions, 0 changer transitions 128/128 dead transitions. [2023-11-21 21:03:42,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 128 transitions, 1377 flow [2023-11-21 21:03:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:03:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:03:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2023-11-21 21:03:42,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2023-11-21 21:03:42,978 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 109 transitions. [2023-11-21 21:03:42,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 109 transitions. [2023-11-21 21:03:42,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:42,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 109 transitions. [2023-11-21 21:03:42,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:42,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:42,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:42,980 INFO L175 Difference]: Start difference. First operand has 117 places, 104 transitions, 936 flow. Second operand 6 states and 109 transitions. [2023-11-21 21:03:42,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 128 transitions, 1377 flow [2023-11-21 21:03:43,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 128 transitions, 1318 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-21 21:03:43,021 INFO L231 Difference]: Finished difference. Result has 114 places, 0 transitions, 0 flow [2023-11-21 21:03:43,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=114, PETRI_TRANSITIONS=0} [2023-11-21 21:03:43,022 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 78 predicate places. [2023-11-21 21:03:43,022 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 0 transitions, 0 flow [2023-11-21 21:03:43,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:43,025 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-11-21 21:03:43,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-11-21 21:03:43,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2023-11-21 21:03:43,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-11-21 21:03:43,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-11-21 21:03:43,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-11-21 21:03:43,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-11-21 21:03:43,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-11-21 21:03:43,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-11-21 21:03:43,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-11-21 21:03:43,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-11-21 21:03:43,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-11-21 21:03:43,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-11-21 21:03:43,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-11-21 21:03:43,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-11-21 21:03:43,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-11-21 21:03:43,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:43,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:43,245 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-21 21:03:43,250 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-21 21:03:43,250 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 21:03:43,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 09:03:43 BasicIcfg [2023-11-21 21:03:43,256 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 21:03:43,257 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 21:03:43,257 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 21:03:43,257 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 21:03:43,258 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:03:08" (3/4) ... [2023-11-21 21:03:43,259 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-21 21:03:43,262 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-11-21 21:03:43,270 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 32 nodes and edges [2023-11-21 21:03:43,270 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-11-21 21:03:43,271 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-21 21:03:43,271 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-21 21:03:43,363 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/witness.graphml [2023-11-21 21:03:43,364 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/witness.yml [2023-11-21 21:03:43,364 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 21:03:43,365 INFO L158 Benchmark]: Toolchain (without parser) took 36605.04ms. Allocated memory was 184.5MB in the beginning and 490.7MB in the end (delta: 306.2MB). Free memory was 154.6MB in the beginning and 200.6MB in the end (delta: -46.0MB). Peak memory consumption was 260.7MB. Max. memory is 16.1GB. [2023-11-21 21:03:43,365 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 130.0MB. Free memory was 103.7MB in the beginning and 103.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:03:43,365 INFO L158 Benchmark]: CACSL2BoogieTranslator took 884.37ms. Allocated memory is still 184.5MB. Free memory was 154.4MB in the beginning and 127.7MB in the end (delta: 26.7MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. [2023-11-21 21:03:43,366 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.46ms. Allocated memory is still 184.5MB. Free memory was 127.7MB in the beginning and 125.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 21:03:43,366 INFO L158 Benchmark]: Boogie Preprocessor took 46.50ms. Allocated memory is still 184.5MB. Free memory was 125.5MB in the beginning and 123.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 21:03:43,367 INFO L158 Benchmark]: RCFGBuilder took 810.38ms. Allocated memory is still 184.5MB. Free memory was 123.5MB in the beginning and 139.0MB in the end (delta: -15.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-21 21:03:43,367 INFO L158 Benchmark]: TraceAbstraction took 34691.83ms. Allocated memory was 184.5MB in the beginning and 490.7MB in the end (delta: 306.2MB). Free memory was 137.9MB in the beginning and 204.3MB in the end (delta: -66.4MB). Peak memory consumption was 241.4MB. Max. memory is 16.1GB. [2023-11-21 21:03:43,368 INFO L158 Benchmark]: Witness Printer took 107.39ms. Allocated memory is still 490.7MB. Free memory was 204.3MB in the beginning and 200.6MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 21:03:43,370 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 130.0MB. Free memory was 103.7MB in the beginning and 103.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 884.37ms. Allocated memory is still 184.5MB. Free memory was 154.4MB in the beginning and 127.7MB in the end (delta: 26.7MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.46ms. Allocated memory is still 184.5MB. Free memory was 127.7MB in the beginning and 125.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.50ms. Allocated memory is still 184.5MB. Free memory was 125.5MB in the beginning and 123.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 810.38ms. Allocated memory is still 184.5MB. Free memory was 123.5MB in the beginning and 139.0MB in the end (delta: -15.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 34691.83ms. Allocated memory was 184.5MB in the beginning and 490.7MB in the end (delta: 306.2MB). Free memory was 137.9MB in the beginning and 204.3MB in the end (delta: -66.4MB). Peak memory consumption was 241.4MB. Max. memory is 16.1GB. * Witness Printer took 107.39ms. Allocated memory is still 490.7MB. Free memory was 204.3MB in the beginning and 200.6MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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, 48 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: 34.6s, OverallIterations: 19, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 17.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3963 SdHoareTripleChecker+Valid, 7.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3770 mSDsluCounter, 1481 SdHoareTripleChecker+Invalid, 5.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1471 mSDsCounter, 81 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9147 IncrementalHoareTripleChecker+Invalid, 9228 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 81 mSolverCounterUnsat, 10 mSDtfsCounter, 9147 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 978 GetRequests, 700 SyntacticMatches, 4 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=936occurred in iteration=18, InterpolantAutomatonStates: 177, 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, 11.7s InterpolantComputationTime, 1044 NumberOfCodeBlocks, 926 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1333 ConstructedInterpolants, 45 QuantifiedInterpolants, 13914 SizeOfPredicates, 41 NumberOfNonLiveVariables, 2357 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 39 InterpolantComputations, 10 PerfectInterpolantSequences, 3369/4065 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! [2023-11-21 21:03:43,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1a8e65-1f89-470c-bbec-536cfbeb8f73/bin/uautomizer-verify-bycVGegfSx/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