./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6a420ba5144c69cefe02db203552770c4018653c510d9792e57ffedc3dfc64e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:37:58,064 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:37:58,155 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 21:37:58,161 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:37:58,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:37:58,186 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:37:58,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:37:58,187 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:37:58,188 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:37:58,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:37:58,189 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:37:58,190 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:37:58,190 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:37:58,191 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:37:58,191 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:37:58,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:37:58,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:37:58,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:37:58,193 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:37:58,194 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:37:58,194 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:37:58,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:37:58,199 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:37:58,199 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:37:58,200 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:37:58,200 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:37:58,201 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:37:58,201 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:37:58,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:37:58,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:37:58,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:37:58,204 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:37:58,204 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:37:58,204 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:37:58,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:37:58,205 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:37:58,205 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:37:58,205 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:37:58,206 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:37:58,206 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_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6a420ba5144c69cefe02db203552770c4018653c510d9792e57ffedc3dfc64e [2023-11-23 21:37:58,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:37:58,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:37:58,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:37:58,515 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:37:58,515 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:37:58,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i [2023-11-23 21:38:01,681 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:38:02,043 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:38:02,044 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i [2023-11-23 21:38:02,066 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/data/ef4f60723/39295f4fb2154489a829025f7ade33fa/FLAG1c5acaf1e [2023-11-23 21:38:02,082 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/data/ef4f60723/39295f4fb2154489a829025f7ade33fa [2023-11-23 21:38:02,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:38:02,088 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:38:02,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:38:02,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:38:02,099 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:38:02,100 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a00c357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02, skipping insertion in model container [2023-11-23 21:38:02,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,154 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:38:02,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:38:02,567 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:38:02,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:38:02,685 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:38:02,685 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:38:02,694 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:38:02,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02 WrapperNode [2023-11-23 21:38:02,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:38:02,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:38:02,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:38:02,697 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:38:02,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,724 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,775 INFO L138 Inliner]: procedures = 179, calls = 50, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 194 [2023-11-23 21:38:02,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:38:02,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:38:02,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:38:02,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:38:02,787 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,792 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,806 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,811 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,816 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:38:02,817 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:38:02,817 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:38:02,817 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:38:02,818 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (1/1) ... [2023-11-23 21:38:02,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:38:02,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:02,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:38:02,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69961948-187a-410a-bb90-bf4e4fc446fd/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:38:02,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:38:02,903 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-23 21:38:02,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-23 21:38:02,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:38:02,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 21:38:02,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:38:02,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:38:02,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:38:02,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:38:02,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 21:38:02,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:38:02,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:38:02,906 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:38:03,050 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:38:03,053 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:38:03,614 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:38:04,088 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:38:04,088 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:38:04,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:38:04 BoogieIcfgContainer [2023-11-23 21:38:04,089 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:38:04,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:38:04,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:38:04,098 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:38:04,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:38:02" (1/3) ... [2023-11-23 21:38:04,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158417c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:38:04, skipping insertion in model container [2023-11-23 21:38:04,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:02" (2/3) ... [2023-11-23 21:38:04,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158417c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:38:04, skipping insertion in model container [2023-11-23 21:38:04,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:38:04" (3/3) ... [2023-11-23 21:38:04,104 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-2.i [2023-11-23 21:38:04,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:38:04,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-11-23 21:38:04,127 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:38:04,279 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 21:38:04,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 85 transitions, 174 flow [2023-11-23 21:38:04,404 INFO L124 PetriNetUnfolderBase]: 8/92 cut-off events. [2023-11-23 21:38:04,404 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 21:38:04,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 92 events. 8/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 220 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 82. Up to 3 conditions per place. [2023-11-23 21:38:04,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 85 transitions, 174 flow [2023-11-23 21:38:04,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 85 transitions, 174 flow [2023-11-23 21:38:04,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:38:04,449 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;@243e516e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:38:04,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-23 21:38:04,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 21:38:04,454 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-23 21:38:04,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 21:38:04,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:04,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 21:38:04,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-23 21:38:04,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:04,463 INFO L85 PathProgramCache]: Analyzing trace with hash 699129, now seen corresponding path program 1 times [2023-11-23 21:38:04,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:04,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503089682] [2023-11-23 21:38:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:04,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:04,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:04,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503089682] [2023-11-23 21:38:04,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503089682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:04,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:04,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:38:04,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918625476] [2023-11-23 21:38:04,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:04,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:38:04,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:38:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:38:04,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 85 [2023-11-23 21:38:04,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:04,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:04,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 85 [2023-11-23 21:38:04,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:05,391 INFO L124 PetriNetUnfolderBase]: 271/672 cut-off events. [2023-11-23 21:38:05,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 21:38:05,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 672 events. 271/672 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3099 event pairs, 127 based on Foata normal form. 9/433 useless extension candidates. Maximal degree in co-relation 1204. Up to 292 conditions per place. [2023-11-23 21:38:05,409 INFO L140 encePairwiseOnDemand]: 65/85 looper letters, 80 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-11-23 21:38:05,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 380 flow [2023-11-23 21:38:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:38:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:38:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2023-11-23 21:38:05,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6823529411764706 [2023-11-23 21:38:05,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 174 transitions. [2023-11-23 21:38:05,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 174 transitions. [2023-11-23 21:38:05,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:05,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 174 transitions. [2023-11-23 21:38:05,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,442 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 174 flow. Second operand 3 states and 174 transitions. [2023-11-23 21:38:05,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 380 flow [2023-11-23 21:38:05,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 21:38:05,451 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 170 flow [2023-11-23 21:38:05,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-11-23 21:38:05,457 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -11 predicate places. [2023-11-23 21:38:05,457 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 170 flow [2023-11-23 21:38:05,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:05,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 21:38:05,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:38:05,459 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-23 21:38:05,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:05,459 INFO L85 PathProgramCache]: Analyzing trace with hash 699130, now seen corresponding path program 1 times [2023-11-23 21:38:05,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:05,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927184667] [2023-11-23 21:38:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:05,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:05,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:05,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927184667] [2023-11-23 21:38:05,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927184667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:05,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:05,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:38:05,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722548356] [2023-11-23 21:38:05,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:05,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:38:05,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:38:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:38:05,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-23 21:38:05,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:05,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-23 21:38:05,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:05,791 INFO L124 PetriNetUnfolderBase]: 171/484 cut-off events. [2023-11-23 21:38:05,791 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-23 21:38:05,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 484 events. 171/484 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2101 event pairs, 125 based on Foata normal form. 65/386 useless extension candidates. Maximal degree in co-relation 896. Up to 387 conditions per place. [2023-11-23 21:38:05,796 INFO L140 encePairwiseOnDemand]: 83/85 looper letters, 47 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-11-23 21:38:05,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 264 flow [2023-11-23 21:38:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:38:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:38:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2023-11-23 21:38:05,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44313725490196076 [2023-11-23 21:38:05,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2023-11-23 21:38:05,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2023-11-23 21:38:05,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:05,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2023-11-23 21:38:05,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,811 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 170 flow. Second operand 3 states and 113 transitions. [2023-11-23 21:38:05,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 264 flow [2023-11-23 21:38:05,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 70 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 21:38:05,818 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 162 flow [2023-11-23 21:38:05,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-11-23 21:38:05,819 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -12 predicate places. [2023-11-23 21:38:05,819 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 162 flow [2023-11-23 21:38:05,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:05,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:38:05,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:38:05,822 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-23 21:38:05,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:05,827 INFO L85 PathProgramCache]: Analyzing trace with hash -646323223, now seen corresponding path program 1 times [2023-11-23 21:38:05,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:05,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025005643] [2023-11-23 21:38:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:06,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:06,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025005643] [2023-11-23 21:38:06,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025005643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:06,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:06,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:38:06,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928200998] [2023-11-23 21:38:06,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:06,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:38:06,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:06,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:38:06,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:38:06,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 85 [2023-11-23 21:38:06,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:06,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 85 [2023-11-23 21:38:06,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:06,314 INFO L124 PetriNetUnfolderBase]: 165/468 cut-off events. [2023-11-23 21:38:06,314 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-23 21:38:06,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 468 events. 165/468 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2014 event pairs, 121 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 873. Up to 375 conditions per place. [2023-11-23 21:38:06,320 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 45 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-11-23 21:38:06,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 250 flow [2023-11-23 21:38:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:38:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:38:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-23 21:38:06,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2023-11-23 21:38:06,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-23 21:38:06,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-23 21:38:06,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:06,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-23 21:38:06,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,328 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 162 flow. Second operand 3 states and 115 transitions. [2023-11-23 21:38:06,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 250 flow [2023-11-23 21:38:06,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:38:06,334 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 159 flow [2023-11-23 21:38:06,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2023-11-23 21:38:06,336 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -13 predicate places. [2023-11-23 21:38:06,336 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 159 flow [2023-11-23 21:38:06,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:06,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:38:06,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:38:06,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-23 21:38:06,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:06,338 INFO L85 PathProgramCache]: Analyzing trace with hash -646323224, now seen corresponding path program 1 times [2023-11-23 21:38:06,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:06,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242669284] [2023-11-23 21:38:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:06,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:06,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242669284] [2023-11-23 21:38:06,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242669284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:06,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:06,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:38:06,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166108384] [2023-11-23 21:38:06,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:06,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:38:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:38:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:38:06,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-23 21:38:06,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:06,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-23 21:38:06,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:06,795 INFO L124 PetriNetUnfolderBase]: 225/593 cut-off events. [2023-11-23 21:38:06,796 INFO L125 PetriNetUnfolderBase]: For 64/92 co-relation queries the response was YES. [2023-11-23 21:38:06,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 593 events. 225/593 cut-off events. For 64/92 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2727 event pairs, 115 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 1163. Up to 266 conditions per place. [2023-11-23 21:38:06,801 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 73 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-11-23 21:38:06,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 96 transitions, 371 flow [2023-11-23 21:38:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:38:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:38:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-23 21:38:06,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568627450980392 [2023-11-23 21:38:06,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-23 21:38:06,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-23 21:38:06,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:06,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-23 21:38:06,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,807 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 159 flow. Second operand 3 states and 142 transitions. [2023-11-23 21:38:06,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 96 transitions, 371 flow [2023-11-23 21:38:06,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:38:06,813 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 175 flow [2023-11-23 21:38:06,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2023-11-23 21:38:06,815 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -13 predicate places. [2023-11-23 21:38:06,815 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 175 flow [2023-11-23 21:38:06,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:06,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:06,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-23 21:38:06,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:38:06,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-23 21:38:06,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:06,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1652571357, now seen corresponding path program 1 times [2023-11-23 21:38:06,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:06,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249426169] [2023-11-23 21:38:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:06,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:38:06,839 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:38:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:38:06,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 21:38:06,882 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:38:06,883 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2023-11-23 21:38:06,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2023-11-23 21:38:06,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2023-11-23 21:38:06,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2023-11-23 21:38:06,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2023-11-23 21:38:06,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2023-11-23 21:38:06,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2023-11-23 21:38:06,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2023-11-23 21:38:06,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2023-11-23 21:38:06,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2023-11-23 21:38:06,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2023-11-23 21:38:06,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2023-11-23 21:38:06,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2023-11-23 21:38:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2023-11-23 21:38:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2023-11-23 21:38:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2023-11-23 21:38:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2023-11-23 21:38:06,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2023-11-23 21:38:06,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2023-11-23 21:38:06,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2023-11-23 21:38:06,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2023-11-23 21:38:06,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2023-11-23 21:38:06,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2023-11-23 21:38:06,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (58 of 82 remaining) [2023-11-23 21:38:06,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2023-11-23 21:38:06,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 82 remaining) [2023-11-23 21:38:06,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (55 of 82 remaining) [2023-11-23 21:38:06,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2023-11-23 21:38:06,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2023-11-23 21:38:06,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 82 remaining) [2023-11-23 21:38:06,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 82 remaining) [2023-11-23 21:38:06,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 82 remaining) [2023-11-23 21:38:06,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2023-11-23 21:38:06,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2023-11-23 21:38:06,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2023-11-23 21:38:06,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2023-11-23 21:38:06,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2023-11-23 21:38:06,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 82 remaining) [2023-11-23 21:38:06,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2023-11-23 21:38:06,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2023-11-23 21:38:06,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2023-11-23 21:38:06,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2023-11-23 21:38:06,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (39 of 82 remaining) [2023-11-23 21:38:06,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2023-11-23 21:38:06,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2023-11-23 21:38:06,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2023-11-23 21:38:06,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2023-11-23 21:38:06,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2023-11-23 21:38:06,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2023-11-23 21:38:06,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2023-11-23 21:38:06,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2023-11-23 21:38:06,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2023-11-23 21:38:06,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2023-11-23 21:38:06,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2023-11-23 21:38:06,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2023-11-23 21:38:06,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2023-11-23 21:38:06,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2023-11-23 21:38:06,913 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2023-11-23 21:38:06,913 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2023-11-23 21:38:06,913 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2023-11-23 21:38:06,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2023-11-23 21:38:06,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2023-11-23 21:38:06,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2023-11-23 21:38:06,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2023-11-23 21:38:06,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2023-11-23 21:38:06,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 82 remaining) [2023-11-23 21:38:06,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2023-11-23 21:38:06,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2023-11-23 21:38:06,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (13 of 82 remaining) [2023-11-23 21:38:06,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2023-11-23 21:38:06,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2023-11-23 21:38:06,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (10 of 82 remaining) [2023-11-23 21:38:06,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 82 remaining) [2023-11-23 21:38:06,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2023-11-23 21:38:06,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2023-11-23 21:38:06,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2023-11-23 21:38:06,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2023-11-23 21:38:06,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2023-11-23 21:38:06,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2023-11-23 21:38:06,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 82 remaining) [2023-11-23 21:38:06,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2023-11-23 21:38:06,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 82 remaining) [2023-11-23 21:38:06,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:38:06,922 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-23 21:38:06,925 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 21:38:06,925 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-23 21:38:07,094 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 21:38:07,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 160 transitions, 330 flow [2023-11-23 21:38:07,140 INFO L124 PetriNetUnfolderBase]: 16/175 cut-off events. [2023-11-23 21:38:07,140 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 21:38:07,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 175 events. 16/175 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 643 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 156. Up to 3 conditions per place. [2023-11-23 21:38:07,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 160 transitions, 330 flow [2023-11-23 21:38:07,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 160 transitions, 330 flow [2023-11-23 21:38:07,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:38:07,160 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;@243e516e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:38:07,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2023-11-23 21:38:07,164 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 21:38:07,164 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-23 21:38:07,164 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 21:38:07,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:07,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 21:38:07,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-23 21:38:07,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash 858009, now seen corresponding path program 1 times [2023-11-23 21:38:07,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:07,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808393535] [2023-11-23 21:38:07,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:07,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:07,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:07,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808393535] [2023-11-23 21:38:07,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808393535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:07,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:07,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:38:07,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558639184] [2023-11-23 21:38:07,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:07,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:38:07,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:07,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:38:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:38:07,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 160 [2023-11-23 21:38:07,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 160 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:07,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:07,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 160 [2023-11-23 21:38:07,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:14,092 INFO L124 PetriNetUnfolderBase]: 27522/44484 cut-off events. [2023-11-23 21:38:14,092 INFO L125 PetriNetUnfolderBase]: For 500/500 co-relation queries the response was YES. [2023-11-23 21:38:14,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84818 conditions, 44484 events. 27522/44484 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 1521. Compared 361846 event pairs, 10260 based on Foata normal form. 696/26020 useless extension candidates. Maximal degree in co-relation 62891. Up to 21978 conditions per place. [2023-11-23 21:38:14,525 INFO L140 encePairwiseOnDemand]: 124/160 looper letters, 173 selfloop transitions, 6 changer transitions 0/217 dead transitions. [2023-11-23 21:38:14,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 217 transitions, 807 flow [2023-11-23 21:38:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:38:14,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:38:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-11-23 21:38:14,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7395833333333334 [2023-11-23 21:38:14,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-11-23 21:38:14,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-11-23 21:38:14,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:14,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-11-23 21:38:14,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:14,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:14,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:14,534 INFO L175 Difference]: Start difference. First operand has 149 places, 160 transitions, 330 flow. Second operand 3 states and 355 transitions. [2023-11-23 21:38:14,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 217 transitions, 807 flow [2023-11-23 21:38:14,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 217 transitions, 807 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 21:38:14,541 INFO L231 Difference]: Finished difference. Result has 126 places, 134 transitions, 314 flow [2023-11-23 21:38:14,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=126, PETRI_TRANSITIONS=134} [2023-11-23 21:38:14,543 INFO L281 CegarLoopForPetriNet]: 149 programPoint places, -23 predicate places. [2023-11-23 21:38:14,543 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 134 transitions, 314 flow [2023-11-23 21:38:14,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:14,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:14,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 21:38:14,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:38:14,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-23 21:38:14,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:14,545 INFO L85 PathProgramCache]: Analyzing trace with hash 858010, now seen corresponding path program 1 times [2023-11-23 21:38:14,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:14,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389502339] [2023-11-23 21:38:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:14,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:14,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:14,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389502339] [2023-11-23 21:38:14,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389502339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:14,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:14,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:38:14,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731650477] [2023-11-23 21:38:14,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:14,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:38:14,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:14,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:38:14,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:38:14,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 160 [2023-11-23 21:38:14,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 134 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:14,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:14,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 160 [2023-11-23 21:38:14,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:19,580 INFO L124 PetriNetUnfolderBase]: 20687/35192 cut-off events. [2023-11-23 21:38:19,580 INFO L125 PetriNetUnfolderBase]: For 2819/2819 co-relation queries the response was YES. [2023-11-23 21:38:19,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69341 conditions, 35192 events. 20687/35192 cut-off events. For 2819/2819 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 292191 event pairs, 15674 based on Foata normal form. 2831/23303 useless extension candidates. Maximal degree in co-relation 52234. Up to 31221 conditions per place. [2023-11-23 21:38:19,800 INFO L140 encePairwiseOnDemand]: 158/160 looper letters, 92 selfloop transitions, 1 changer transitions 0/133 dead transitions. [2023-11-23 21:38:19,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 133 transitions, 498 flow [2023-11-23 21:38:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:38:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:38:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-11-23 21:38:19,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-23 21:38:19,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-11-23 21:38:19,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-11-23 21:38:19,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:19,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-11-23 21:38:19,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:19,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:19,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:19,808 INFO L175 Difference]: Start difference. First operand has 126 places, 134 transitions, 314 flow. Second operand 3 states and 210 transitions. [2023-11-23 21:38:19,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 133 transitions, 498 flow [2023-11-23 21:38:19,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 133 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 21:38:19,835 INFO L231 Difference]: Finished difference. Result has 125 places, 133 transitions, 302 flow [2023-11-23 21:38:19,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=125, PETRI_TRANSITIONS=133} [2023-11-23 21:38:19,838 INFO L281 CegarLoopForPetriNet]: 149 programPoint places, -24 predicate places. [2023-11-23 21:38:19,838 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 133 transitions, 302 flow [2023-11-23 21:38:19,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:19,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:19,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:38:19,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:38:19,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-23 21:38:19,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash -207864078, now seen corresponding path program 1 times [2023-11-23 21:38:19,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:19,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734562936] [2023-11-23 21:38:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:19,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:19,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734562936] [2023-11-23 21:38:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734562936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:19,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:19,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:38:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380703551] [2023-11-23 21:38:19,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:19,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:38:19,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:38:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:38:20,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 160 [2023-11-23 21:38:20,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 133 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:20,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:20,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 160 [2023-11-23 21:38:20,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:27,990 INFO L124 PetriNetUnfolderBase]: 41491/71594 cut-off events. [2023-11-23 21:38:27,990 INFO L125 PetriNetUnfolderBase]: For 7012/9506 co-relation queries the response was YES. [2023-11-23 21:38:28,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141174 conditions, 71594 events. 41491/71594 cut-off events. For 7012/9506 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 654512 event pairs, 10276 based on Foata normal form. 16/44100 useless extension candidates. Maximal degree in co-relation 141164. Up to 25099 conditions per place. [2023-11-23 21:38:28,659 INFO L140 encePairwiseOnDemand]: 147/160 looper letters, 236 selfloop transitions, 17 changer transitions 0/291 dead transitions. [2023-11-23 21:38:28,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 291 transitions, 1159 flow [2023-11-23 21:38:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:38:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 21:38:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 409 transitions. [2023-11-23 21:38:28,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390625 [2023-11-23 21:38:28,662 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 409 transitions. [2023-11-23 21:38:28,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 409 transitions. [2023-11-23 21:38:28,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:28,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 409 transitions. [2023-11-23 21:38:28,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:28,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:28,667 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:28,667 INFO L175 Difference]: Start difference. First operand has 125 places, 133 transitions, 302 flow. Second operand 4 states and 409 transitions. [2023-11-23 21:38:28,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 291 transitions, 1159 flow [2023-11-23 21:38:28,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 291 transitions, 1158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:38:28,675 INFO L231 Difference]: Finished difference. Result has 130 places, 149 transitions, 461 flow [2023-11-23 21:38:28,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=461, PETRI_PLACES=130, PETRI_TRANSITIONS=149} [2023-11-23 21:38:28,677 INFO L281 CegarLoopForPetriNet]: 149 programPoint places, -19 predicate places. [2023-11-23 21:38:28,677 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 149 transitions, 461 flow [2023-11-23 21:38:28,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:28,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:28,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:38:28,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:38:28,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-23 21:38:28,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -207864077, now seen corresponding path program 1 times [2023-11-23 21:38:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:28,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003609666] [2023-11-23 21:38:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:28,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:28,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003609666] [2023-11-23 21:38:28,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003609666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:28,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:28,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:38:28,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424946771] [2023-11-23 21:38:28,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:28,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:38:28,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:38:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:38:28,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 160 [2023-11-23 21:38:28,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 149 transitions, 461 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:28,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:28,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 160 [2023-11-23 21:38:28,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:35,039 INFO L124 PetriNetUnfolderBase]: 30547/53044 cut-off events. [2023-11-23 21:38:35,039 INFO L125 PetriNetUnfolderBase]: For 16943/16943 co-relation queries the response was YES. [2023-11-23 21:38:35,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111291 conditions, 53044 events. 30547/53044 cut-off events. For 16943/16943 co-relation queries the response was YES. Maximal size of possible extension queue 1675. Compared 473832 event pairs, 23239 based on Foata normal form. 1778/34965 useless extension candidates. Maximal degree in co-relation 111277. Up to 46439 conditions per place. [2023-11-23 21:38:35,369 INFO L140 encePairwiseOnDemand]: 155/160 looper letters, 104 selfloop transitions, 1 changer transitions 0/145 dead transitions. [2023-11-23 21:38:35,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 145 transitions, 663 flow [2023-11-23 21:38:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:38:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:38:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-11-23 21:38:35,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-11-23 21:38:35,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-11-23 21:38:35,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-11-23 21:38:35,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:35,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-11-23 21:38:35,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:35,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:35,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:35,375 INFO L175 Difference]: Start difference. First operand has 130 places, 149 transitions, 461 flow. Second operand 3 states and 212 transitions. [2023-11-23 21:38:35,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 145 transitions, 663 flow [2023-11-23 21:38:35,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 145 transitions, 663 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 21:38:35,403 INFO L231 Difference]: Finished difference. Result has 128 places, 145 transitions, 455 flow [2023-11-23 21:38:35,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=455, PETRI_PLACES=128, PETRI_TRANSITIONS=145} [2023-11-23 21:38:35,406 INFO L281 CegarLoopForPetriNet]: 149 programPoint places, -21 predicate places. [2023-11-23 21:38:35,406 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 145 transitions, 455 flow [2023-11-23 21:38:35,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:35,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:35,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:35,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:38:35,408 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-23 21:38:35,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash 865169584, now seen corresponding path program 1 times [2023-11-23 21:38:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:35,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898854951] [2023-11-23 21:38:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:35,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:35,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:35,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898854951] [2023-11-23 21:38:35,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898854951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:35,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:35,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:38:35,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231577528] [2023-11-23 21:38:35,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:35,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:38:35,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:38:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:38:35,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 160 [2023-11-23 21:38:35,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 145 transitions, 455 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:35,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:35,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 160 [2023-11-23 21:38:35,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:45,550 INFO L124 PetriNetUnfolderBase]: 48523/84246 cut-off events. [2023-11-23 21:38:45,551 INFO L125 PetriNetUnfolderBase]: For 27554/31031 co-relation queries the response was YES. [2023-11-23 21:38:45,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178566 conditions, 84246 events. 48523/84246 cut-off events. For 27554/31031 co-relation queries the response was YES. Maximal size of possible extension queue 2640. Compared 790531 event pairs, 13357 based on Foata normal form. 32/55869 useless extension candidates. Maximal degree in co-relation 178550. Up to 35496 conditions per place. [2023-11-23 21:38:46,114 INFO L140 encePairwiseOnDemand]: 129/160 looper letters, 219 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2023-11-23 21:38:46,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 294 transitions, 1377 flow [2023-11-23 21:38:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:38:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 21:38:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 398 transitions. [2023-11-23 21:38:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2023-11-23 21:38:46,122 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 398 transitions. [2023-11-23 21:38:46,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 398 transitions. [2023-11-23 21:38:46,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:46,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 398 transitions. [2023-11-23 21:38:46,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:46,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:46,131 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:46,131 INFO L175 Difference]: Start difference. First operand has 128 places, 145 transitions, 455 flow. Second operand 4 states and 398 transitions. [2023-11-23 21:38:46,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 294 transitions, 1377 flow [2023-11-23 21:38:46,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 294 transitions, 1376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:38:46,210 INFO L231 Difference]: Finished difference. Result has 133 places, 175 transitions, 814 flow [2023-11-23 21:38:46,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=814, PETRI_PLACES=133, PETRI_TRANSITIONS=175} [2023-11-23 21:38:46,212 INFO L281 CegarLoopForPetriNet]: 149 programPoint places, -16 predicate places. [2023-11-23 21:38:46,213 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 175 transitions, 814 flow [2023-11-23 21:38:46,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:46,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:46,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:46,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:38:46,214 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-23 21:38:46,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:46,215 INFO L85 PathProgramCache]: Analyzing trace with hash 865169585, now seen corresponding path program 1 times [2023-11-23 21:38:46,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:46,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530824631] [2023-11-23 21:38:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:46,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:46,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:46,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530824631] [2023-11-23 21:38:46,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530824631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:46,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:46,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:38:46,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596233580] [2023-11-23 21:38:46,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:46,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:38:46,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:38:46,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:38:46,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 160 [2023-11-23 21:38:46,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 814 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:46,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:46,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 160 [2023-11-23 21:38:46,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand