./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7faac9952fd378b53dcd8f21391daa9cc75834f7be2a5ad0c70d96fc8524bd08 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:41:28,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:41:28,665 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:41:28,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:41:28,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:41:28,738 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:41:28,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:41:28,741 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:41:28,742 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:41:28,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:41:28,750 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:41:28,751 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:41:28,752 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:41:28,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:41:28,755 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:41:28,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:41:28,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:41:28,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:41:28,757 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:41:28,758 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:41:28,758 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:41:28,759 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:41:28,760 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:41:28,760 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:41:28,761 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:41:28,761 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:41:28,762 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:41:28,763 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:41:28,764 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:41:28,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:41:28,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:41:28,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:41:28,767 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:41:28,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:41:28,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:41:28,768 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:41:28,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:41:28,768 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:41:28,769 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_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faac9952fd378b53dcd8f21391daa9cc75834f7be2a5ad0c70d96fc8524bd08 [2023-11-06 22:41:29,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:41:29,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:41:29,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:41:29,184 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:41:29,185 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:41:29,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i [2023-11-06 22:41:32,879 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:41:33,297 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:41:33,297 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i [2023-11-06 22:41:33,322 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/data/599b9e5c3/5a9d5fc1a9454711aa72e8f4b550b37b/FLAG217f8c37c [2023-11-06 22:41:33,340 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/data/599b9e5c3/5a9d5fc1a9454711aa72e8f4b550b37b [2023-11-06 22:41:33,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:41:33,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:41:33,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:41:33,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:41:33,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:41:33,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:33" (1/1) ... [2023-11-06 22:41:33,359 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ced4125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:33, skipping insertion in model container [2023-11-06 22:41:33,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:33" (1/1) ... [2023-11-06 22:41:33,445 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:41:34,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:41:34,280 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:41:34,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:41:34,567 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:41:34,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34 WrapperNode [2023-11-06 22:41:34,568 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:41:34,570 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:41:34,570 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:41:34,570 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:41:34,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,710 INFO L138 Inliner]: procedures = 377, calls = 73, calls flagged for inlining = 10, calls inlined = 11, statements flattened = 245 [2023-11-06 22:41:34,712 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:41:34,713 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:41:34,713 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:41:34,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:41:34,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,759 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,774 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:41:34,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:41:34,795 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:41:34,795 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:41:34,796 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (1/1) ... [2023-11-06 22:41:34,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:41:34,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:34,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:41:34,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:41:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:41:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:41:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:41:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 22:41:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:41:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:41:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:41:34,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:41:34,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:41:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:41:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:41:34,901 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:41:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:41:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:41:34,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:41:34,905 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:41:35,100 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:41:35,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:41:35,898 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:41:35,937 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:41:35,938 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-06 22:41:35,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:35 BoogieIcfgContainer [2023-11-06 22:41:35,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:41:35,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:41:35,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:41:35,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:41:35,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:41:33" (1/3) ... [2023-11-06 22:41:35,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ad043c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:35, skipping insertion in model container [2023-11-06 22:41:35,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:34" (2/3) ... [2023-11-06 22:41:35,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ad043c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:35, skipping insertion in model container [2023-11-06 22:41:35,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:35" (3/3) ... [2023-11-06 22:41:35,991 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_94-alloc_region_racing.i [2023-11-06 22:41:36,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:41:36,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2023-11-06 22:41:36,021 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:41:36,197 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:41:36,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 326 transitions, 659 flow [2023-11-06 22:41:36,488 INFO L124 PetriNetUnfolderBase]: 48/475 cut-off events. [2023-11-06 22:41:36,488 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:41:36,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 475 events. 48/475 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1838 event pairs, 0 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 262. Up to 8 conditions per place. [2023-11-06 22:41:36,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 326 transitions, 659 flow [2023-11-06 22:41:36,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 326 transitions, 659 flow [2023-11-06 22:41:36,540 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:36,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 298 places, 326 transitions, 659 flow [2023-11-06 22:41:36,576 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 298 places, 326 transitions, 659 flow [2023-11-06 22:41:36,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 326 transitions, 659 flow [2023-11-06 22:41:36,750 INFO L124 PetriNetUnfolderBase]: 48/475 cut-off events. [2023-11-06 22:41:36,750 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:41:36,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 475 events. 48/475 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1838 event pairs, 0 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 262. Up to 8 conditions per place. [2023-11-06 22:41:36,779 INFO L119 LiptonReduction]: Number of co-enabled transitions 33480 [2023-11-06 22:41:59,585 INFO L134 LiptonReduction]: Checked pairs total: 108432 [2023-11-06 22:41:59,586 INFO L136 LiptonReduction]: Total number of compositions: 290 [2023-11-06 22:41:59,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:59,614 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;@5f16e689, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:59,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2023-11-06 22:41:59,618 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:41:59,618 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 22:41:59,618 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:59,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:59,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:41:59,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-11-06 22:41:59,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:59,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1208, now seen corresponding path program 1 times [2023-11-06 22:41:59,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:59,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329382542] [2023-11-06 22:41:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:59,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:59,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:59,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329382542] [2023-11-06 22:41:59,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329382542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:59,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:59,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:41:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539817393] [2023-11-06 22:41:59,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:59,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:41:59,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:41:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:41:59,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 616 [2023-11-06 22:41:59,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 150 transitions, 307 flow. Second operand has 2 states, 2 states have (on average 295.5) internal successors, (591), 2 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:59,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:59,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 616 [2023-11-06 22:41:59,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:00,787 INFO L124 PetriNetUnfolderBase]: 1554/3815 cut-off events. [2023-11-06 22:42:00,787 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:42:00,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6860 conditions, 3815 events. 1554/3815 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 28986 event pairs, 1440 based on Foata normal form. 320/2457 useless extension candidates. Maximal degree in co-relation 6733. Up to 3040 conditions per place. [2023-11-06 22:42:00,820 INFO L140 encePairwiseOnDemand]: 585/616 looper letters, 82 selfloop transitions, 0 changer transitions 0/119 dead transitions. [2023-11-06 22:42:00,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 409 flow [2023-11-06 22:42:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:42:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:42:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 703 transitions. [2023-11-06 22:42:00,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706168831168831 [2023-11-06 22:42:00,849 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 703 transitions. [2023-11-06 22:42:00,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 703 transitions. [2023-11-06 22:42:00,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:00,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 703 transitions. [2023-11-06 22:42:00,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:00,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 616.0) internal successors, (1848), 3 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:00,879 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 616.0) internal successors, (1848), 3 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:00,881 INFO L175 Difference]: Start difference. First operand has 126 places, 150 transitions, 307 flow. Second operand 2 states and 703 transitions. [2023-11-06 22:42:00,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 409 flow [2023-11-06 22:42:00,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 409 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:00,893 INFO L231 Difference]: Finished difference. Result has 119 places, 119 transitions, 245 flow [2023-11-06 22:42:00,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=245, PETRI_PLACES=119, PETRI_TRANSITIONS=119} [2023-11-06 22:42:00,902 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -7 predicate places. [2023-11-06 22:42:00,903 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 119 transitions, 245 flow [2023-11-06 22:42:00,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 295.5) internal successors, (591), 2 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:00,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:00,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:42:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:42:00,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-11-06 22:42:00,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash 38492, now seen corresponding path program 1 times [2023-11-06 22:42:00,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:00,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968805542] [2023-11-06 22:42:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:00,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:01,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:01,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968805542] [2023-11-06 22:42:01,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968805542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:01,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:01,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:42:01,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537502548] [2023-11-06 22:42:01,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:01,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:01,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:01,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 616 [2023-11-06 22:42:01,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 119 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:01,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:01,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 616 [2023-11-06 22:42:01,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:02,409 INFO L124 PetriNetUnfolderBase]: 1548/3787 cut-off events. [2023-11-06 22:42:02,410 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:42:02,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6795 conditions, 3787 events. 1548/3787 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 28835 event pairs, 1408 based on Foata normal form. 0/2126 useless extension candidates. Maximal degree in co-relation 6791. Up to 2998 conditions per place. [2023-11-06 22:42:02,499 INFO L140 encePairwiseOnDemand]: 611/616 looper letters, 83 selfloop transitions, 3 changer transitions 0/123 dead transitions. [2023-11-06 22:42:02,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 123 transitions, 425 flow [2023-11-06 22:42:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 943 transitions. [2023-11-06 22:42:02,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102813852813853 [2023-11-06 22:42:02,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 943 transitions. [2023-11-06 22:42:02,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 943 transitions. [2023-11-06 22:42:02,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:02,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 943 transitions. [2023-11-06 22:42:02,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:02,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:02,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:02,524 INFO L175 Difference]: Start difference. First operand has 119 places, 119 transitions, 245 flow. Second operand 3 states and 943 transitions. [2023-11-06 22:42:02,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 123 transitions, 425 flow [2023-11-06 22:42:02,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:02,536 INFO L231 Difference]: Finished difference. Result has 122 places, 121 transitions, 266 flow [2023-11-06 22:42:02,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=122, PETRI_TRANSITIONS=121} [2023-11-06 22:42:02,539 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -4 predicate places. [2023-11-06 22:42:02,539 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 121 transitions, 266 flow [2023-11-06 22:42:02,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:02,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:02,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:42:02,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:42:02,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-11-06 22:42:02,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:02,555 INFO L85 PathProgramCache]: Analyzing trace with hash 38493, now seen corresponding path program 1 times [2023-11-06 22:42:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329617383] [2023-11-06 22:42:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:02,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329617383] [2023-11-06 22:42:02,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329617383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:02,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:02,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:42:02,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747613651] [2023-11-06 22:42:02,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:02,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:02,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 616 [2023-11-06 22:42:02,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 121 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:02,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:02,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 616 [2023-11-06 22:42:02,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:03,612 INFO L124 PetriNetUnfolderBase]: 1480/3643 cut-off events. [2023-11-06 22:42:03,612 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-06 22:42:03,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6667 conditions, 3643 events. 1480/3643 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27785 event pairs, 1280 based on Foata normal form. 0/2114 useless extension candidates. Maximal degree in co-relation 6661. Up to 2737 conditions per place. [2023-11-06 22:42:03,644 INFO L140 encePairwiseOnDemand]: 612/616 looper letters, 112 selfloop transitions, 2 changer transitions 0/151 dead transitions. [2023-11-06 22:42:03,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 151 transitions, 556 flow [2023-11-06 22:42:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2023-11-06 22:42:03,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2023-11-06 22:42:03,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2023-11-06 22:42:03,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2023-11-06 22:42:03,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:03,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2023-11-06 22:42:03,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:03,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:03,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:03,665 INFO L175 Difference]: Start difference. First operand has 122 places, 121 transitions, 266 flow. Second operand 3 states and 972 transitions. [2023-11-06 22:42:03,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 151 transitions, 556 flow [2023-11-06 22:42:03,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 151 transitions, 553 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:03,674 INFO L231 Difference]: Finished difference. Result has 121 places, 119 transitions, 263 flow [2023-11-06 22:42:03,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=121, PETRI_TRANSITIONS=119} [2023-11-06 22:42:03,678 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -5 predicate places. [2023-11-06 22:42:03,682 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 119 transitions, 263 flow [2023-11-06 22:42:03,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:03,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:03,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:42:03,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:42:03,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-11-06 22:42:03,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1147575443, now seen corresponding path program 1 times [2023-11-06 22:42:03,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:03,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694443318] [2023-11-06 22:42:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:03,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:04,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:04,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694443318] [2023-11-06 22:42:04,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694443318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:04,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180254121] [2023-11-06 22:42:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:04,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:04,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:04,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:04,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:42:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:04,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:42:04,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:04,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:42:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:04,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:04,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180254121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:04,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:04,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:42:04,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370122552] [2023-11-06 22:42:04,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:04,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:42:04,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:42:04,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:42:05,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 616 [2023-11-06 22:42:05,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 119 transitions, 263 flow. Second operand has 7 states, 7 states have (on average 283.7142857142857) internal successors, (1986), 7 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:05,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:05,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 616 [2023-11-06 22:42:05,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:06,285 INFO L124 PetriNetUnfolderBase]: 1407/3436 cut-off events. [2023-11-06 22:42:06,286 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-06 22:42:06,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6271 conditions, 3436 events. 1407/3436 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 25990 event pairs, 897 based on Foata normal form. 1/2045 useless extension candidates. Maximal degree in co-relation 6265. Up to 2559 conditions per place. [2023-11-06 22:42:06,322 INFO L140 encePairwiseOnDemand]: 611/616 looper letters, 139 selfloop transitions, 6 changer transitions 0/182 dead transitions. [2023-11-06 22:42:06,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 182 transitions, 677 flow [2023-11-06 22:42:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:42:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:42:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1840 transitions. [2023-11-06 22:42:06,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2023-11-06 22:42:06,331 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1840 transitions. [2023-11-06 22:42:06,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1840 transitions. [2023-11-06 22:42:06,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:06,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1840 transitions. [2023-11-06 22:42:06,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 306.6666666666667) internal successors, (1840), 6 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:06,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 616.0) internal successors, (4312), 7 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:06,356 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 616.0) internal successors, (4312), 7 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:06,356 INFO L175 Difference]: Start difference. First operand has 121 places, 119 transitions, 263 flow. Second operand 6 states and 1840 transitions. [2023-11-06 22:42:06,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 182 transitions, 677 flow [2023-11-06 22:42:06,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 182 transitions, 673 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:06,368 INFO L231 Difference]: Finished difference. Result has 123 places, 118 transitions, 267 flow [2023-11-06 22:42:06,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=123, PETRI_TRANSITIONS=118} [2023-11-06 22:42:06,371 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -3 predicate places. [2023-11-06 22:42:06,372 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 118 transitions, 267 flow [2023-11-06 22:42:06,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 283.7142857142857) internal successors, (1986), 7 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:06,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:06,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:42:06,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:06,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebfe9fe5-285b-46f0-a774-6d8d02a34ccd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:06,587 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-11-06 22:42:06,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1147575316, now seen corresponding path program 1 times [2023-11-06 22:42:06,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:06,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760458218] [2023-11-06 22:42:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:06,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:06,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:06,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760458218] [2023-11-06 22:42:06,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760458218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:06,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:06,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:06,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531120032] [2023-11-06 22:42:06,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:06,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:06,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:06,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:06,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:06,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 616 [2023-11-06 22:42:06,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 118 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:06,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:06,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 616 [2023-11-06 22:42:06,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:07,549 INFO L124 PetriNetUnfolderBase]: 1343/3291 cut-off events. [2023-11-06 22:42:07,549 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-11-06 22:42:07,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6080 conditions, 3291 events. 1343/3291 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 25044 event pairs, 194 based on Foata normal form. 0/1924 useless extension candidates. Maximal degree in co-relation 6074. Up to 2351 conditions per place. [2023-11-06 22:42:07,578 INFO L140 encePairwiseOnDemand]: 611/616 looper letters, 123 selfloop transitions, 5 changer transitions 0/165 dead transitions. [2023-11-06 22:42:07,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 165 transitions, 625 flow [2023-11-06 22:42:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1003 transitions. [2023-11-06 22:42:07,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427489177489178 [2023-11-06 22:42:07,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1003 transitions. [2023-11-06 22:42:07,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1003 transitions. [2023-11-06 22:42:07,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:07,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1003 transitions. [2023-11-06 22:42:07,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.3333333333333) internal successors, (1003), 3 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:07,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:07,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:07,605 INFO L175 Difference]: Start difference. First operand has 123 places, 118 transitions, 267 flow. Second operand 3 states and 1003 transitions. [2023-11-06 22:42:07,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 165 transitions, 625 flow [2023-11-06 22:42:07,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 165 transitions, 606 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-06 22:42:07,612 INFO L231 Difference]: Finished difference. Result has 124 places, 121 transitions, 287 flow [2023-11-06 22:42:07,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2023-11-06 22:42:07,613 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -2 predicate places. [2023-11-06 22:42:07,614 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 287 flow [2023-11-06 22:42:07,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:07,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:07,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:42:07,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:42:07,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-11-06 22:42:07,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1147575317, now seen corresponding path program 1 times [2023-11-06 22:42:07,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:07,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870922697] [2023-11-06 22:42:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:07,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:07,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:07,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870922697] [2023-11-06 22:42:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870922697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:07,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:07,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372616605] [2023-11-06 22:42:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:07,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:07,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:08,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 616 [2023-11-06 22:42:08,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:08,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:08,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 616 [2023-11-06 22:42:08,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:08,748 INFO L124 PetriNetUnfolderBase]: 1299/3183 cut-off events. [2023-11-06 22:42:08,748 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2023-11-06 22:42:08,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5962 conditions, 3183 events. 1299/3183 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 24272 event pairs, 160 based on Foata normal form. 43/1962 useless extension candidates. Maximal degree in co-relation 5956. Up to 2336 conditions per place. [2023-11-06 22:42:08,776 INFO L140 encePairwiseOnDemand]: 613/616 looper letters, 121 selfloop transitions, 4 changer transitions 0/162 dead transitions. [2023-11-06 22:42:08,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 162 transitions, 622 flow [2023-11-06 22:42:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2023-11-06 22:42:08,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54004329004329 [2023-11-06 22:42:08,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2023-11-06 22:42:08,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2023-11-06 22:42:08,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:08,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2023-11-06 22:42:08,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:08,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:08,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:08,803 INFO L175 Difference]: Start difference. First operand has 124 places, 121 transitions, 287 flow. Second operand 3 states and 998 transitions. [2023-11-06 22:42:08,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 162 transitions, 622 flow [2023-11-06 22:42:08,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 162 transitions, 612 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:08,809 INFO L231 Difference]: Finished difference. Result has 123 places, 120 transitions, 283 flow [2023-11-06 22:42:08,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=123, PETRI_TRANSITIONS=120} [2023-11-06 22:42:08,814 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -3 predicate places. [2023-11-06 22:42:08,814 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 120 transitions, 283 flow [2023-11-06 22:42:08,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:08,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:08,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:42:08,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:42:08,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-11-06 22:42:08,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:08,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1215101222, now seen corresponding path program 1 times [2023-11-06 22:42:08,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:08,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256019564] [2023-11-06 22:42:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:08,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:42:08,863 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:42:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:42:08,922 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:42:08,923 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:42:08,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (82 of 83 remaining) [2023-11-06 22:42:08,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 83 remaining) [2023-11-06 22:42:08,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 83 remaining) [2023-11-06 22:42:08,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 83 remaining) [2023-11-06 22:42:08,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 83 remaining) [2023-11-06 22:42:08,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 83 remaining) [2023-11-06 22:42:08,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 83 remaining) [2023-11-06 22:42:08,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 83 remaining) [2023-11-06 22:42:08,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 83 remaining) [2023-11-06 22:42:08,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 83 remaining) [2023-11-06 22:42:08,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 83 remaining) [2023-11-06 22:42:08,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 83 remaining) [2023-11-06 22:42:08,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 83 remaining) [2023-11-06 22:42:08,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 83 remaining) [2023-11-06 22:42:08,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 83 remaining) [2023-11-06 22:42:08,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 83 remaining) [2023-11-06 22:42:08,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 83 remaining) [2023-11-06 22:42:08,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 83 remaining) [2023-11-06 22:42:08,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 83 remaining) [2023-11-06 22:42:08,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 83 remaining) [2023-11-06 22:42:08,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 83 remaining) [2023-11-06 22:42:08,934 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 83 remaining) [2023-11-06 22:42:08,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 83 remaining) [2023-11-06 22:42:08,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 83 remaining) [2023-11-06 22:42:08,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 83 remaining) [2023-11-06 22:42:08,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 83 remaining) [2023-11-06 22:42:08,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 83 remaining) [2023-11-06 22:42:08,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 83 remaining) [2023-11-06 22:42:08,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 83 remaining) [2023-11-06 22:42:08,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK (53 of 83 remaining) [2023-11-06 22:42:08,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 83 remaining) [2023-11-06 22:42:08,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 83 remaining) [2023-11-06 22:42:08,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 83 remaining) [2023-11-06 22:42:08,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 83 remaining) [2023-11-06 22:42:08,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 83 remaining) [2023-11-06 22:42:08,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 83 remaining) [2023-11-06 22:42:08,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 83 remaining) [2023-11-06 22:42:08,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 83 remaining) [2023-11-06 22:42:08,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 83 remaining) [2023-11-06 22:42:08,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 83 remaining) [2023-11-06 22:42:08,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK (42 of 83 remaining) [2023-11-06 22:42:08,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 83 remaining) [2023-11-06 22:42:08,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 83 remaining) [2023-11-06 22:42:08,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 83 remaining) [2023-11-06 22:42:08,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 83 remaining) [2023-11-06 22:42:08,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 83 remaining) [2023-11-06 22:42:08,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 83 remaining) [2023-11-06 22:42:08,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 83 remaining) [2023-11-06 22:42:08,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 83 remaining) [2023-11-06 22:42:08,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 83 remaining) [2023-11-06 22:42:08,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 83 remaining) [2023-11-06 22:42:08,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 83 remaining) [2023-11-06 22:42:08,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 83 remaining) [2023-11-06 22:42:08,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 83 remaining) [2023-11-06 22:42:08,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 83 remaining) [2023-11-06 22:42:08,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 83 remaining) [2023-11-06 22:42:08,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 83 remaining) [2023-11-06 22:42:08,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 83 remaining) [2023-11-06 22:42:08,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 83 remaining) [2023-11-06 22:42:08,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 83 remaining) [2023-11-06 22:42:08,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 83 remaining) [2023-11-06 22:42:08,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr20ASSERT_VIOLATIONMEMORY_LEAK (21 of 83 remaining) [2023-11-06 22:42:08,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 83 remaining) [2023-11-06 22:42:08,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 83 remaining) [2023-11-06 22:42:08,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 83 remaining) [2023-11-06 22:42:08,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 83 remaining) [2023-11-06 22:42:08,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 83 remaining) [2023-11-06 22:42:08,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 83 remaining) [2023-11-06 22:42:08,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 83 remaining) [2023-11-06 22:42:08,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 83 remaining) [2023-11-06 22:42:08,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 83 remaining) [2023-11-06 22:42:08,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 83 remaining) [2023-11-06 22:42:08,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 83 remaining) [2023-11-06 22:42:08,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 83 remaining) [2023-11-06 22:42:08,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 83 remaining) [2023-11-06 22:42:08,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 83 remaining) [2023-11-06 22:42:08,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 83 remaining) [2023-11-06 22:42:08,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 83 remaining) [2023-11-06 22:42:08,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 83 remaining) [2023-11-06 22:42:08,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 83 remaining) [2023-11-06 22:42:08,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 83 remaining) [2023-11-06 22:42:08,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 83 remaining) [2023-11-06 22:42:08,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 83 remaining) [2023-11-06 22:42:08,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:42:08,954 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:08,957 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:42:08,957 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:42:09,050 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:42:09,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 436 transitions, 888 flow [2023-11-06 22:42:09,249 INFO L124 PetriNetUnfolderBase]: 81/765 cut-off events. [2023-11-06 22:42:09,249 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:42:09,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 765 events. 81/765 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3731 event pairs, 0 based on Foata normal form. 0/531 useless extension candidates. Maximal degree in co-relation 477. Up to 12 conditions per place. [2023-11-06 22:42:09,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 436 transitions, 888 flow [2023-11-06 22:42:09,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 396 places, 436 transitions, 888 flow [2023-11-06 22:42:09,280 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:42:09,280 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 396 places, 436 transitions, 888 flow [2023-11-06 22:42:09,280 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 396 places, 436 transitions, 888 flow [2023-11-06 22:42:09,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 436 transitions, 888 flow [2023-11-06 22:42:09,469 INFO L124 PetriNetUnfolderBase]: 81/765 cut-off events. [2023-11-06 22:42:09,470 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:42:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 765 events. 81/765 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3731 event pairs, 0 based on Foata normal form. 0/531 useless extension candidates. Maximal degree in co-relation 477. Up to 12 conditions per place. [2023-11-06 22:42:09,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 92664 [2023-11-06 22:42:32,300 INFO L134 LiptonReduction]: Checked pairs total: 310356 [2023-11-06 22:42:32,300 INFO L136 LiptonReduction]: Total number of compositions: 361 [2023-11-06 22:42:32,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:42:32,304 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;@5f16e689, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:42:32,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-11-06 22:42:32,305 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:42:32,305 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 22:42:32,305 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:42:32,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:32,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:42:32,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 22:42:32,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2106, now seen corresponding path program 1 times [2023-11-06 22:42:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:32,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542061485] [2023-11-06 22:42:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:32,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:32,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:32,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542061485] [2023-11-06 22:42:32,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542061485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:32,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:32,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:42:32,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952293879] [2023-11-06 22:42:32,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:32,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:42:32,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:42:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:42:32,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 797 [2023-11-06 22:42:32,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 211 transitions, 438 flow. Second operand has 2 states, 2 states have (on average 390.5) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:32,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:32,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 797 [2023-11-06 22:42:32,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:51,483 INFO L124 PetriNetUnfolderBase]: 101644/170569 cut-off events. [2023-11-06 22:42:51,484 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2023-11-06 22:42:51,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319805 conditions, 170569 events. 101644/170569 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 3874. Compared 1627549 event pairs, 96606 based on Foata normal form. 15317/116309 useless extension candidates. Maximal degree in co-relation 263878. Up to 149065 conditions per place. [2023-11-06 22:42:53,016 INFO L140 encePairwiseOnDemand]: 755/797 looper letters, 115 selfloop transitions, 0 changer transitions 0/169 dead transitions. [2023-11-06 22:42:53,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 169 transitions, 584 flow [2023-11-06 22:42:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:42:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:42:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 937 transitions. [2023-11-06 22:42:53,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878293601003765 [2023-11-06 22:42:53,023 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 937 transitions. [2023-11-06 22:42:53,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 937 transitions. [2023-11-06 22:42:53,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:53,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 937 transitions. [2023-11-06 22:42:53,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 468.5) internal successors, (937), 2 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:53,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:53,038 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:53,038 INFO L175 Difference]: Start difference. First operand has 176 places, 211 transitions, 438 flow. Second operand 2 states and 937 transitions. [2023-11-06 22:42:53,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 169 transitions, 584 flow [2023-11-06 22:42:53,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 169 transitions, 584 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:53,046 INFO L231 Difference]: Finished difference. Result has 169 places, 169 transitions, 354 flow [2023-11-06 22:42:53,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=797, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=354, PETRI_PLACES=169, PETRI_TRANSITIONS=169} [2023-11-06 22:42:53,048 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -7 predicate places. [2023-11-06 22:42:53,049 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 169 transitions, 354 flow [2023-11-06 22:42:53,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 390.5) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:53,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:53,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:42:53,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:42:53,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 22:42:53,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash 67462, now seen corresponding path program 1 times [2023-11-06 22:42:53,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:53,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586996392] [2023-11-06 22:42:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:53,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:53,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:53,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586996392] [2023-11-06 22:42:53,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586996392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:53,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:53,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:42:53,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667916956] [2023-11-06 22:42:53,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:53,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:53,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:53,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:53,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:53,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 381 out of 797 [2023-11-06 22:42:53,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 169 transitions, 354 flow. Second operand has 3 states, 3 states have (on average 381.6666666666667) internal successors, (1145), 3 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:53,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:53,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 381 of 797 [2023-11-06 22:42:53,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand