./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:04:31,508 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:04:31,579 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:04:31,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:04:31,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:04:31,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:04:31,614 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:04:31,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:04:31,616 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:04:31,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:04:31,618 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:04:31,618 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:04:31,619 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:04:31,620 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:04:31,620 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:04:31,621 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:04:31,622 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:04:31,622 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:04:31,623 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:04:31,624 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:04:31,624 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:04:31,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:04:31,626 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:04:31,626 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:04:31,627 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:04:31,628 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:04:31,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:04:31,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:04:31,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:04:31,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:31,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:04:31,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:04:31,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:04:31,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:04:31,633 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:04:31,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:04:31,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:04:31,634 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:04:31,634 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_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2023-11-06 23:04:31,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:04:31,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:04:31,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:04:31,942 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:04:31,942 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:04:31,944 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-06 23:04:35,020 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:04:35,380 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:04:35,381 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-06 23:04:35,424 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/data/830659ffc/92a15f5a251445b6b72641ec0caf0375/FLAG727b966a2 [2023-11-06 23:04:35,443 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/data/830659ffc/92a15f5a251445b6b72641ec0caf0375 [2023-11-06 23:04:35,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:04:35,453 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:04:35,458 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:35,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:04:35,464 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:04:35,465 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:35" (1/1) ... [2023-11-06 23:04:35,466 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b1b0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:35, skipping insertion in model container [2023-11-06 23:04:35,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:35" (1/1) ... [2023-11-06 23:04:35,542 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:04:36,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:36,155 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:04:36,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:36,362 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:04:36,363 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36 WrapperNode [2023-11-06 23:04:36,363 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:36,364 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:36,364 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:04:36,365 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:04:36,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,407 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,466 INFO L138 Inliner]: procedures = 274, calls = 59, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 208 [2023-11-06 23:04:36,466 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:36,467 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:04:36,467 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:04:36,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:04:36,477 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,493 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,500 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,511 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,515 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,525 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:04:36,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:04:36,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:04:36,527 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:04:36,528 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (1/1) ... [2023-11-06 23:04:36,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:36,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:04:36,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:04:36,609 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 23:04:36,611 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 23:04:36,611 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 23:04:36,612 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 23:04:36,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:04:36,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:04:36,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:04:36,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:04:36,613 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 23:04:36,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:04:36,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:04:36,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:04:36,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:04:36,616 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:04:36,831 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:04:36,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:04:37,477 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:04:37,489 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:04:37,497 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:04:37,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:37 BoogieIcfgContainer [2023-11-06 23:04:37,505 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:04:37,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:04:37,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:04:37,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:04:37,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:04:35" (1/3) ... [2023-11-06 23:04:37,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56250a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:37, skipping insertion in model container [2023-11-06 23:04:37,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:36" (2/3) ... [2023-11-06 23:04:37,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56250a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:37, skipping insertion in model container [2023-11-06 23:04:37,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:37" (3/3) ... [2023-11-06 23:04:37,516 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2023-11-06 23:04:37,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:04:37,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2023-11-06 23:04:37,539 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:04:37,817 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:04:37,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 298 transitions, 610 flow [2023-11-06 23:04:38,015 INFO L124 PetriNetUnfolderBase]: 15/296 cut-off events. [2023-11-06 23:04:38,016 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:04:38,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 296 events. 15/296 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 704 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 196. Up to 3 conditions per place. [2023-11-06 23:04:38,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 298 transitions, 610 flow [2023-11-06 23:04:38,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 291 transitions, 594 flow [2023-11-06 23:04:38,040 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:04:38,052 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 291 transitions, 594 flow [2023-11-06 23:04:38,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 291 transitions, 594 flow [2023-11-06 23:04:38,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 291 transitions, 594 flow [2023-11-06 23:04:38,138 INFO L124 PetriNetUnfolderBase]: 15/291 cut-off events. [2023-11-06 23:04:38,139 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:04:38,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 291 events. 15/291 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 686 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 196. Up to 3 conditions per place. [2023-11-06 23:04:38,157 INFO L119 LiptonReduction]: Number of co-enabled transitions 19748 [2023-11-06 23:04:55,422 INFO L134 LiptonReduction]: Checked pairs total: 61464 [2023-11-06 23:04:55,423 INFO L136 LiptonReduction]: Total number of compositions: 393 [2023-11-06 23:04:55,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:04:55,447 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;@38e48015, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:04:55,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-11-06 23:04:55,449 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:04:55,449 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 23:04:55,450 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:04:55,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:55,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 23:04:55,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:04:55,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1256, now seen corresponding path program 1 times [2023-11-06 23:04:55,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:55,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799181562] [2023-11-06 23:04:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:55,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:55,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:55,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799181562] [2023-11-06 23:04:55,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799181562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:55,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:55,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 23:04:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907850648] [2023-11-06 23:04:55,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:55,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:04:55,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:55,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:04:55,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:04:55,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 691 [2023-11-06 23:04:55,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 106 transitions, 224 flow. Second operand has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:55,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:55,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 691 [2023-11-06 23:04:55,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:56,725 INFO L124 PetriNetUnfolderBase]: 4087/6349 cut-off events. [2023-11-06 23:04:56,726 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-06 23:04:56,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12655 conditions, 6349 events. 4087/6349 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 35186 event pairs, 3451 based on Foata normal form. 0/3225 useless extension candidates. Maximal degree in co-relation 12174. Up to 6236 conditions per place. [2023-11-06 23:04:56,785 INFO L140 encePairwiseOnDemand]: 655/691 looper letters, 63 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2023-11-06 23:04:56,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 278 flow [2023-11-06 23:04:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:04:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 23:04:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 669 transitions. [2023-11-06 23:04:56,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4840810419681621 [2023-11-06 23:04:56,805 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 669 transitions. [2023-11-06 23:04:56,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 669 transitions. [2023-11-06 23:04:56,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:56,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 669 transitions. [2023-11-06 23:04:56,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:56,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 691.0) internal successors, (2073), 3 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:56,827 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 691.0) internal successors, (2073), 3 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:56,829 INFO L175 Difference]: Start difference. First operand has 106 places, 106 transitions, 224 flow. Second operand 2 states and 669 transitions. [2023-11-06 23:04:56,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 278 flow [2023-11-06 23:04:56,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:04:56,841 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 144 flow [2023-11-06 23:04:56,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2023-11-06 23:04:56,847 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -39 predicate places. [2023-11-06 23:04:56,848 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 144 flow [2023-11-06 23:04:56,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:56,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:56,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:04:56,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:04:56,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:04:56,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:56,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1245768, now seen corresponding path program 1 times [2023-11-06 23:04:56,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:56,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138334212] [2023-11-06 23:04:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:56,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138334212] [2023-11-06 23:04:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138334212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:57,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:57,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:04:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103038428] [2023-11-06 23:04:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:57,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:57,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:57,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 691 [2023-11-06 23:04:57,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:57,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:57,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 691 [2023-11-06 23:04:57,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:58,039 INFO L124 PetriNetUnfolderBase]: 4037/6251 cut-off events. [2023-11-06 23:04:58,039 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 23:04:58,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12414 conditions, 6251 events. 4037/6251 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 34392 event pairs, 3408 based on Foata normal form. 0/3195 useless extension candidates. Maximal degree in co-relation 12411. Up to 6139 conditions per place. [2023-11-06 23:04:58,094 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 59 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-06 23:04:58,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 262 flow [2023-11-06 23:04:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:04:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2023-11-06 23:04:58,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283646888567294 [2023-11-06 23:04:58,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2023-11-06 23:04:58,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2023-11-06 23:04:58,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:58,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2023-11-06 23:04:58,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:58,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:58,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:58,115 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 144 flow. Second operand 3 states and 888 transitions. [2023-11-06 23:04:58,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 262 flow [2023-11-06 23:04:58,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:04:58,121 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 144 flow [2023-11-06 23:04:58,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2023-11-06 23:04:58,125 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -39 predicate places. [2023-11-06 23:04:58,126 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 144 flow [2023-11-06 23:04:58,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:58,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:58,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:04:58,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:04:58,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:04:58,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:58,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1245769, now seen corresponding path program 1 times [2023-11-06 23:04:58,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:58,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813773116] [2023-11-06 23:04:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:58,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:58,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:58,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813773116] [2023-11-06 23:04:58,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813773116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:58,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:58,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:04:58,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707426527] [2023-11-06 23:04:58,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:58,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:58,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:58,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 691 [2023-11-06 23:04:58,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:58,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:58,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 691 [2023-11-06 23:04:58,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:59,284 INFO L124 PetriNetUnfolderBase]: 3987/6153 cut-off events. [2023-11-06 23:04:59,285 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 23:04:59,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12224 conditions, 6153 events. 3987/6153 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 33652 event pairs, 3365 based on Foata normal form. 0/3165 useless extension candidates. Maximal degree in co-relation 12220. Up to 6044 conditions per place. [2023-11-06 23:04:59,329 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 57 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-06 23:04:59,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 258 flow [2023-11-06 23:04:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:04:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-11-06 23:04:59,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331886155330439 [2023-11-06 23:04:59,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-11-06 23:04:59,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-11-06 23:04:59,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:59,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-11-06 23:04:59,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,346 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,346 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 144 flow. Second operand 3 states and 898 transitions. [2023-11-06 23:04:59,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 258 flow [2023-11-06 23:04:59,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:04:59,349 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 140 flow [2023-11-06 23:04:59,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-11-06 23:04:59,350 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -41 predicate places. [2023-11-06 23:04:59,351 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 140 flow [2023-11-06 23:04:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:59,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:04:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:04:59,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:04:59,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1197200326, now seen corresponding path program 1 times [2023-11-06 23:04:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:59,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365208776] [2023-11-06 23:04:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:59,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:59,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:59,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365208776] [2023-11-06 23:04:59,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365208776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:59,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:59,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:04:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783684336] [2023-11-06 23:04:59,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:59,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:59,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:59,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 691 [2023-11-06 23:04:59,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:59,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 691 [2023-11-06 23:04:59,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:00,639 INFO L124 PetriNetUnfolderBase]: 4093/6374 cut-off events. [2023-11-06 23:05:00,639 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 23:05:00,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12666 conditions, 6374 events. 4093/6374 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 35289 event pairs, 2902 based on Foata normal form. 0/3181 useless extension candidates. Maximal degree in co-relation 12662. Up to 6257 conditions per place. [2023-11-06 23:05:00,680 INFO L140 encePairwiseOnDemand]: 686/691 looper letters, 66 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-11-06 23:05:00,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 300 flow [2023-11-06 23:05:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 893 transitions. [2023-11-06 23:05:00,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43077665219488664 [2023-11-06 23:05:00,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 893 transitions. [2023-11-06 23:05:00,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 893 transitions. [2023-11-06 23:05:00,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:00,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 893 transitions. [2023-11-06 23:05:00,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:00,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:00,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:00,698 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 140 flow. Second operand 3 states and 893 transitions. [2023-11-06 23:05:00,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 300 flow [2023-11-06 23:05:00,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:00,701 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 162 flow [2023-11-06 23:05:00,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-11-06 23:05:00,702 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -40 predicate places. [2023-11-06 23:05:00,703 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 162 flow [2023-11-06 23:05:00,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:00,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:00,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:05:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:05:00,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:00,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1197200323, now seen corresponding path program 1 times [2023-11-06 23:05:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:00,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337058834] [2023-11-06 23:05:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337058834] [2023-11-06 23:05:00,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337058834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:00,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:00,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:05:00,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514996856] [2023-11-06 23:05:00,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:00,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:00,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:00,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:01,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 691 [2023-11-06 23:05:01,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:01,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:01,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 691 [2023-11-06 23:05:01,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:01,647 INFO L124 PetriNetUnfolderBase]: 3390/5227 cut-off events. [2023-11-06 23:05:01,647 INFO L125 PetriNetUnfolderBase]: For 224/311 co-relation queries the response was YES. [2023-11-06 23:05:01,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10604 conditions, 5227 events. 3390/5227 cut-off events. For 224/311 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 27689 event pairs, 2802 based on Foata normal form. 0/2961 useless extension candidates. Maximal degree in co-relation 10599. Up to 5126 conditions per place. [2023-11-06 23:05:01,680 INFO L140 encePairwiseOnDemand]: 686/691 looper letters, 56 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-06 23:05:01,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 268 flow [2023-11-06 23:05:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-11-06 23:05:01,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380125422093584 [2023-11-06 23:05:01,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-11-06 23:05:01,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-11-06 23:05:01,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:01,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-11-06 23:05:01,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:01,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:01,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:01,698 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 162 flow. Second operand 3 states and 908 transitions. [2023-11-06 23:05:01,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 268 flow [2023-11-06 23:05:01,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:01,701 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 152 flow [2023-11-06 23:05:01,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-11-06 23:05:01,702 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -43 predicate places. [2023-11-06 23:05:01,703 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 152 flow [2023-11-06 23:05:01,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:01,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:01,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:05:01,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:05:01,704 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:01,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:01,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1197200324, now seen corresponding path program 1 times [2023-11-06 23:05:01,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:01,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282207899] [2023-11-06 23:05:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:01,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:01,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:01,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282207899] [2023-11-06 23:05:01,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282207899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:01,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:01,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:05:01,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607571512] [2023-11-06 23:05:01,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:01,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:01,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:01,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:01,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 691 [2023-11-06 23:05:01,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:01,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:01,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 691 [2023-11-06 23:05:01,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:02,523 INFO L124 PetriNetUnfolderBase]: 2956/4550 cut-off events. [2023-11-06 23:05:02,523 INFO L125 PetriNetUnfolderBase]: For 204/283 co-relation queries the response was YES. [2023-11-06 23:05:02,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9232 conditions, 4550 events. 2956/4550 cut-off events. For 204/283 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 23354 event pairs, 2409 based on Foata normal form. 0/2720 useless extension candidates. Maximal degree in co-relation 9227. Up to 4457 conditions per place. [2023-11-06 23:05:02,554 INFO L140 encePairwiseOnDemand]: 686/691 looper letters, 52 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-06 23:05:02,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 254 flow [2023-11-06 23:05:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 901 transitions. [2023-11-06 23:05:02,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43463579353593823 [2023-11-06 23:05:02,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 901 transitions. [2023-11-06 23:05:02,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 901 transitions. [2023-11-06 23:05:02,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:02,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 901 transitions. [2023-11-06 23:05:02,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:02,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:02,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:02,575 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 152 flow. Second operand 3 states and 901 transitions. [2023-11-06 23:05:02,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 254 flow [2023-11-06 23:05:02,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 62 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:02,578 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 149 flow [2023-11-06 23:05:02,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2023-11-06 23:05:02,579 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -45 predicate places. [2023-11-06 23:05:02,580 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 149 flow [2023-11-06 23:05:02,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:02,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:02,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:05:02,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:05:02,582 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:02,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1197212170, now seen corresponding path program 1 times [2023-11-06 23:05:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:02,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319654138] [2023-11-06 23:05:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:02,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:02,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:02,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319654138] [2023-11-06 23:05:02,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319654138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:02,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:02,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:05:02,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163767870] [2023-11-06 23:05:02,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:02,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:02,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:02,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:02,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:03,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 691 [2023-11-06 23:05:03,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:03,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 691 [2023-11-06 23:05:03,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:03,481 INFO L124 PetriNetUnfolderBase]: 2149/3368 cut-off events. [2023-11-06 23:05:03,481 INFO L125 PetriNetUnfolderBase]: For 162/221 co-relation queries the response was YES. [2023-11-06 23:05:03,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6846 conditions, 3368 events. 2149/3368 cut-off events. For 162/221 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16777 event pairs, 1733 based on Foata normal form. 0/2168 useless extension candidates. Maximal degree in co-relation 6841. Up to 3293 conditions per place. [2023-11-06 23:05:03,506 INFO L140 encePairwiseOnDemand]: 688/691 looper letters, 51 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-06 23:05:03,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 253 flow [2023-11-06 23:05:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 883 transitions. [2023-11-06 23:05:03,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259527255185721 [2023-11-06 23:05:03,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 883 transitions. [2023-11-06 23:05:03,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 883 transitions. [2023-11-06 23:05:03,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:03,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 883 transitions. [2023-11-06 23:05:03,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.3333333333333) internal successors, (883), 3 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,522 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 149 flow. Second operand 3 states and 883 transitions. [2023-11-06 23:05:03,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 253 flow [2023-11-06 23:05:03,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:03,524 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 147 flow [2023-11-06 23:05:03,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-11-06 23:05:03,526 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -46 predicate places. [2023-11-06 23:05:03,526 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 147 flow [2023-11-06 23:05:03,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:03,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:05:03,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:05:03,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:03,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:03,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1197212169, now seen corresponding path program 1 times [2023-11-06 23:05:03,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:03,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819495085] [2023-11-06 23:05:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:03,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:03,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819495085] [2023-11-06 23:05:03,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819495085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:03,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:03,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:05:03,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30500185] [2023-11-06 23:05:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:03,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:03,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 691 [2023-11-06 23:05:03,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 272.25) internal successors, (1089), 4 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:03,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 691 [2023-11-06 23:05:03,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:04,129 INFO L124 PetriNetUnfolderBase]: 1342/2186 cut-off events. [2023-11-06 23:05:04,130 INFO L125 PetriNetUnfolderBase]: For 120/159 co-relation queries the response was YES. [2023-11-06 23:05:04,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4458 conditions, 2186 events. 1342/2186 cut-off events. For 120/159 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10525 event pairs, 1057 based on Foata normal form. 0/1616 useless extension candidates. Maximal degree in co-relation 4453. Up to 2129 conditions per place. [2023-11-06 23:05:04,145 INFO L140 encePairwiseOnDemand]: 688/691 looper letters, 50 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-06 23:05:04,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 249 flow [2023-11-06 23:05:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2023-11-06 23:05:04,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41678726483357453 [2023-11-06 23:05:04,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2023-11-06 23:05:04,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2023-11-06 23:05:04,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:04,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2023-11-06 23:05:04,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,160 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 147 flow. Second operand 3 states and 864 transitions. [2023-11-06 23:05:04,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 249 flow [2023-11-06 23:05:04,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:04,163 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 145 flow [2023-11-06 23:05:04,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2023-11-06 23:05:04,164 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -47 predicate places. [2023-11-06 23:05:04,164 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 145 flow [2023-11-06 23:05:04,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 272.25) internal successors, (1089), 4 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:04,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:05:04,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:05:04,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:04,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1541341198, now seen corresponding path program 1 times [2023-11-06 23:05:04,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:04,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198463771] [2023-11-06 23:05:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:04,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:04,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198463771] [2023-11-06 23:05:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198463771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:04,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:04,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:05:04,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010627271] [2023-11-06 23:05:04,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:04,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:04,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:04,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 691 [2023-11-06 23:05:04,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 270.5) internal successors, (1082), 4 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:04,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 691 [2023-11-06 23:05:04,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:05,424 INFO L124 PetriNetUnfolderBase]: 1730/2853 cut-off events. [2023-11-06 23:05:05,424 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-11-06 23:05:05,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5840 conditions, 2853 events. 1730/2853 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14970 event pairs, 389 based on Foata normal form. 27/2131 useless extension candidates. Maximal degree in co-relation 5835. Up to 2268 conditions per place. [2023-11-06 23:05:05,444 INFO L140 encePairwiseOnDemand]: 685/691 looper letters, 74 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2023-11-06 23:05:05,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 370 flow [2023-11-06 23:05:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:05:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:05:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1156 transitions. [2023-11-06 23:05:05,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182344428364689 [2023-11-06 23:05:05,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1156 transitions. [2023-11-06 23:05:05,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1156 transitions. [2023-11-06 23:05:05,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:05,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1156 transitions. [2023-11-06 23:05:05,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:05,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:05,465 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:05,466 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 145 flow. Second operand 4 states and 1156 transitions. [2023-11-06 23:05:05,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 370 flow [2023-11-06 23:05:05,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:05,470 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 184 flow [2023-11-06 23:05:05,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2023-11-06 23:05:05,473 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -45 predicate places. [2023-11-06 23:05:05,474 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 184 flow [2023-11-06 23:05:05,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.5) internal successors, (1082), 4 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:05,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:05,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:05:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:05:05,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:05,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:05,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1541494502, now seen corresponding path program 1 times [2023-11-06 23:05:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:05,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200827897] [2023-11-06 23:05:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:05,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:05,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200827897] [2023-11-06 23:05:05,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200827897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:05,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:05,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:05:05,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771097020] [2023-11-06 23:05:05,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:05,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:05,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:06,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 691 [2023-11-06 23:05:06,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:06,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 691 [2023-11-06 23:05:06,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:06,473 INFO L124 PetriNetUnfolderBase]: 1521/2548 cut-off events. [2023-11-06 23:05:06,473 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2023-11-06 23:05:06,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5297 conditions, 2548 events. 1521/2548 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13573 event pairs, 740 based on Foata normal form. 72/2070 useless extension candidates. Maximal degree in co-relation 5291. Up to 1476 conditions per place. [2023-11-06 23:05:06,491 INFO L140 encePairwiseOnDemand]: 684/691 looper letters, 74 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2023-11-06 23:05:06,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 386 flow [2023-11-06 23:05:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:05:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:05:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1164 transitions. [2023-11-06 23:05:06,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211287988422576 [2023-11-06 23:05:06,497 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1164 transitions. [2023-11-06 23:05:06,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1164 transitions. [2023-11-06 23:05:06,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:06,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1164 transitions. [2023-11-06 23:05:06,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,509 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,510 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 184 flow. Second operand 4 states and 1164 transitions. [2023-11-06 23:05:06,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 386 flow [2023-11-06 23:05:06,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:06,516 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 168 flow [2023-11-06 23:05:06,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-11-06 23:05:06,519 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -45 predicate places. [2023-11-06 23:05:06,520 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 168 flow [2023-11-06 23:05:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:06,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:06,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 23:05:06,521 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:06,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:06,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1471121744, now seen corresponding path program 1 times [2023-11-06 23:05:06,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:06,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256390965] [2023-11-06 23:05:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:06,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:06,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:06,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256390965] [2023-11-06 23:05:06,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256390965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:06,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:06,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:05:06,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328029938] [2023-11-06 23:05:06,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:06,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:06,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:06,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:06,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:06,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 691 [2023-11-06 23:05:06,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:06,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 691 [2023-11-06 23:05:06,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:06,795 INFO L124 PetriNetUnfolderBase]: 431/858 cut-off events. [2023-11-06 23:05:06,796 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-06 23:05:06,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 858 events. 431/858 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4359 event pairs, 262 based on Foata normal form. 38/781 useless extension candidates. Maximal degree in co-relation 1811. Up to 435 conditions per place. [2023-11-06 23:05:06,801 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 61 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-11-06 23:05:06,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 332 flow [2023-11-06 23:05:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-11-06 23:05:06,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341534008683068 [2023-11-06 23:05:06,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-11-06 23:05:06,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-11-06 23:05:06,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:06,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-11-06 23:05:06,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,816 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 168 flow. Second operand 3 states and 900 transitions. [2023-11-06 23:05:06,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 332 flow [2023-11-06 23:05:06,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:05:06,819 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 169 flow [2023-11-06 23:05:06,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-11-06 23:05:06,820 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -45 predicate places. [2023-11-06 23:05:06,820 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 169 flow [2023-11-06 23:05:06,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:06,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:06,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:05:06,821 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:06,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1024067660, now seen corresponding path program 1 times [2023-11-06 23:05:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050499523] [2023-11-06 23:05:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:07,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:07,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050499523] [2023-11-06 23:05:07,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050499523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:07,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:07,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:05:07,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980858690] [2023-11-06 23:05:07,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:07,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:07,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:07,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 691 [2023-11-06 23:05:07,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 271.2) internal successors, (1356), 5 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:07,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:07,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 691 [2023-11-06 23:05:07,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:07,753 INFO L124 PetriNetUnfolderBase]: 440/886 cut-off events. [2023-11-06 23:05:07,753 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-06 23:05:07,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1880 conditions, 886 events. 440/886 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4589 event pairs, 271 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 1873. Up to 784 conditions per place. [2023-11-06 23:05:07,759 INFO L140 encePairwiseOnDemand]: 683/691 looper letters, 61 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2023-11-06 23:05:07,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 352 flow [2023-11-06 23:05:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:05:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:05:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1683 transitions. [2023-11-06 23:05:07,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40593342981186686 [2023-11-06 23:05:07,766 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1683 transitions. [2023-11-06 23:05:07,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1683 transitions. [2023-11-06 23:05:07,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:07,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1683 transitions. [2023-11-06 23:05:07,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 280.5) internal successors, (1683), 6 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:07,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 691.0) internal successors, (4837), 7 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:07,782 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 691.0) internal successors, (4837), 7 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:07,782 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 169 flow. Second operand 6 states and 1683 transitions. [2023-11-06 23:05:07,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 352 flow [2023-11-06 23:05:07,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:07,785 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 232 flow [2023-11-06 23:05:07,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-11-06 23:05:07,786 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -38 predicate places. [2023-11-06 23:05:07,786 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 232 flow [2023-11-06 23:05:07,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.2) internal successors, (1356), 5 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:07,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:07,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:07,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 23:05:07,787 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:07,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:07,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1828466354, now seen corresponding path program 1 times [2023-11-06 23:05:07,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:07,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943374766] [2023-11-06 23:05:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:07,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:08,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:08,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943374766] [2023-11-06 23:05:08,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943374766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:08,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:08,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:08,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183446154] [2023-11-06 23:05:08,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:08,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:08,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:08,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 691 [2023-11-06 23:05:08,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:08,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:08,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 691 [2023-11-06 23:05:08,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:08,524 INFO L124 PetriNetUnfolderBase]: 414/836 cut-off events. [2023-11-06 23:05:08,525 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2023-11-06 23:05:08,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1917 conditions, 836 events. 414/836 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4065 event pairs, 268 based on Foata normal form. 8/758 useless extension candidates. Maximal degree in co-relation 1907. Up to 582 conditions per place. [2023-11-06 23:05:08,531 INFO L140 encePairwiseOnDemand]: 685/691 looper letters, 70 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2023-11-06 23:05:08,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 447 flow [2023-11-06 23:05:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:05:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:05:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1165 transitions. [2023-11-06 23:05:08,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42149059334298117 [2023-11-06 23:05:08,536 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1165 transitions. [2023-11-06 23:05:08,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1165 transitions. [2023-11-06 23:05:08,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:08,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1165 transitions. [2023-11-06 23:05:08,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.25) internal successors, (1165), 4 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:08,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:08,547 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:08,547 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 232 flow. Second operand 4 states and 1165 transitions. [2023-11-06 23:05:08,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 447 flow [2023-11-06 23:05:08,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 84 transitions, 434 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:08,552 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 238 flow [2023-11-06 23:05:08,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2023-11-06 23:05:08,553 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -35 predicate places. [2023-11-06 23:05:08,553 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 238 flow [2023-11-06 23:05:08,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:08,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:08,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:08,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 23:05:08,554 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:08,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:08,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1644983487, now seen corresponding path program 1 times [2023-11-06 23:05:08,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:08,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644380630] [2023-11-06 23:05:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:08,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:08,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:08,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644380630] [2023-11-06 23:05:08,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644380630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:08,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:08,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:05:08,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287388475] [2023-11-06 23:05:08,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:08,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:08,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:08,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:08,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:08,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 691 [2023-11-06 23:05:08,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 273.75) internal successors, (1095), 4 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:08,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:08,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 691 [2023-11-06 23:05:08,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:09,098 INFO L124 PetriNetUnfolderBase]: 390/788 cut-off events. [2023-11-06 23:05:09,099 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-11-06 23:05:09,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 788 events. 390/788 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3754 event pairs, 319 based on Foata normal form. 16/738 useless extension candidates. Maximal degree in co-relation 1845. Up to 725 conditions per place. [2023-11-06 23:05:09,105 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 53 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-11-06 23:05:09,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 346 flow [2023-11-06 23:05:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 861 transitions. [2023-11-06 23:05:09,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153400868306802 [2023-11-06 23:05:09,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 861 transitions. [2023-11-06 23:05:09,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 861 transitions. [2023-11-06 23:05:09,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:09,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 861 transitions. [2023-11-06 23:05:09,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:09,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:09,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:09,120 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 238 flow. Second operand 3 states and 861 transitions. [2023-11-06 23:05:09,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 346 flow [2023-11-06 23:05:09,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:09,124 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 232 flow [2023-11-06 23:05:09,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2023-11-06 23:05:09,125 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -37 predicate places. [2023-11-06 23:05:09,125 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 232 flow [2023-11-06 23:05:09,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.75) internal successors, (1095), 4 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:09,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:09,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:09,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 23:05:09,127 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:09,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash -545118204, now seen corresponding path program 1 times [2023-11-06 23:05:09,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:09,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304772953] [2023-11-06 23:05:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:09,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:09,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304772953] [2023-11-06 23:05:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304772953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:09,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:09,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:05:09,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572910479] [2023-11-06 23:05:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:09,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:09,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:09,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:10,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 691 [2023-11-06 23:05:10,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 260.85714285714283) internal successors, (1826), 7 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:10,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:10,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 691 [2023-11-06 23:05:10,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:11,217 INFO L124 PetriNetUnfolderBase]: 454/896 cut-off events. [2023-11-06 23:05:11,218 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-11-06 23:05:11,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2136 conditions, 896 events. 454/896 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4335 event pairs, 122 based on Foata normal form. 7/837 useless extension candidates. Maximal degree in co-relation 2124. Up to 672 conditions per place. [2023-11-06 23:05:11,224 INFO L140 encePairwiseOnDemand]: 683/691 looper letters, 74 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2023-11-06 23:05:11,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 488 flow [2023-11-06 23:05:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:05:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:05:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1894 transitions. [2023-11-06 23:05:11,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915650196402729 [2023-11-06 23:05:11,233 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1894 transitions. [2023-11-06 23:05:11,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1894 transitions. [2023-11-06 23:05:11,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:11,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1894 transitions. [2023-11-06 23:05:11,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 270.57142857142856) internal successors, (1894), 7 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:11,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 691.0) internal successors, (5528), 8 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:11,251 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 691.0) internal successors, (5528), 8 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:11,252 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 232 flow. Second operand 7 states and 1894 transitions. [2023-11-06 23:05:11,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 488 flow [2023-11-06 23:05:11,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 482 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:11,256 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 303 flow [2023-11-06 23:05:11,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-11-06 23:05:11,258 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -30 predicate places. [2023-11-06 23:05:11,258 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 303 flow [2023-11-06 23:05:11,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 260.85714285714283) internal successors, (1826), 7 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:11,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:11,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 23:05:11,260 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:11,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:11,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1437450654, now seen corresponding path program 2 times [2023-11-06 23:05:11,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:11,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114029670] [2023-11-06 23:05:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:11,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:11,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:11,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114029670] [2023-11-06 23:05:11,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114029670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:11,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:11,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:05:11,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13789296] [2023-11-06 23:05:11,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:12,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 691 [2023-11-06 23:05:12,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 264.85714285714283) internal successors, (1854), 7 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:12,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:12,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 691 [2023-11-06 23:05:12,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:13,056 INFO L124 PetriNetUnfolderBase]: 486/964 cut-off events. [2023-11-06 23:05:13,056 INFO L125 PetriNetUnfolderBase]: For 411/411 co-relation queries the response was YES. [2023-11-06 23:05:13,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2441 conditions, 964 events. 486/964 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4864 event pairs, 337 based on Foata normal form. 7/900 useless extension candidates. Maximal degree in co-relation 2426. Up to 815 conditions per place. [2023-11-06 23:05:13,063 INFO L140 encePairwiseOnDemand]: 684/691 looper letters, 70 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2023-11-06 23:05:13,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 524 flow [2023-11-06 23:05:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:05:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:05:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1913 transitions. [2023-11-06 23:05:13,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954930742195576 [2023-11-06 23:05:13,073 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1913 transitions. [2023-11-06 23:05:13,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1913 transitions. [2023-11-06 23:05:13,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:13,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1913 transitions. [2023-11-06 23:05:13,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 273.2857142857143) internal successors, (1913), 7 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:13,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 691.0) internal successors, (5528), 8 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:13,092 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 691.0) internal successors, (5528), 8 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:13,093 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 303 flow. Second operand 7 states and 1913 transitions. [2023-11-06 23:05:13,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 524 flow [2023-11-06 23:05:13,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 507 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:13,099 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 347 flow [2023-11-06 23:05:13,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-11-06 23:05:13,099 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -24 predicate places. [2023-11-06 23:05:13,100 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 347 flow [2023-11-06 23:05:13,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 264.85714285714283) internal successors, (1854), 7 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:13,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:13,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:13,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 23:05:13,101 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:13,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash -463727236, now seen corresponding path program 3 times [2023-11-06 23:05:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:13,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538778407] [2023-11-06 23:05:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:13,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:13,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:13,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538778407] [2023-11-06 23:05:13,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538778407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:13,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750471159] [2023-11-06 23:05:13,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:05:13,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:13,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:13,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:13,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:05:13,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:05:13,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:13,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:05:13,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:14,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 23:05:14,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:14,068 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 23:05:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:14,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:14,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-06 23:05:14,143 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_321 (Array Int Int))) (<= 0 (+ |c_~#queue~0.offset| (* (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_321) |c_~#queue~0.base|) .cse0) 4)))) (forall ((v_ArrVal_321 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_321) |c_~#queue~0.base|) .cse0) 401)))) is different from false [2023-11-06 23:05:14,155 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:14,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-11-06 23:05:14,170 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:14,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2023-11-06 23:05:14,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:05:14,197 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 23:05:14,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2023-11-06 23:05:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:14,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750471159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:14,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:14,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-06 23:05:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549808510] [2023-11-06 23:05:14,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:14,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:05:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:14,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:05:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=137, Unknown=1, NotChecked=24, Total=210 [2023-11-06 23:05:14,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 691 [2023-11-06 23:05:14,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 347 flow. Second operand has 15 states, 15 states have (on average 193.6) internal successors, (2904), 15 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:14,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:14,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 691 [2023-11-06 23:05:14,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:15,220 INFO L124 PetriNetUnfolderBase]: 655/1314 cut-off events. [2023-11-06 23:05:15,220 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2023-11-06 23:05:15,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3289 conditions, 1314 events. 655/1314 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7309 event pairs, 314 based on Foata normal form. 8/1217 useless extension candidates. Maximal degree in co-relation 3272. Up to 466 conditions per place. [2023-11-06 23:05:15,231 INFO L140 encePairwiseOnDemand]: 681/691 looper letters, 95 selfloop transitions, 26 changer transitions 0/127 dead transitions. [2023-11-06 23:05:15,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 127 transitions, 753 flow [2023-11-06 23:05:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:05:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:05:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2015 transitions. [2023-11-06 23:05:15,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29160636758321273 [2023-11-06 23:05:15,242 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2015 transitions. [2023-11-06 23:05:15,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2015 transitions. [2023-11-06 23:05:15,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:15,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2015 transitions. [2023-11-06 23:05:15,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 201.5) internal successors, (2015), 10 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:15,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 691.0) internal successors, (7601), 11 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:15,265 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 691.0) internal successors, (7601), 11 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:15,265 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 347 flow. Second operand 10 states and 2015 transitions. [2023-11-06 23:05:15,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 127 transitions, 753 flow [2023-11-06 23:05:15,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 737 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-06 23:05:15,272 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 453 flow [2023-11-06 23:05:15,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=453, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2023-11-06 23:05:15,273 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -15 predicate places. [2023-11-06 23:05:15,273 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 453 flow [2023-11-06 23:05:15,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 193.6) internal successors, (2904), 15 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:15,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:15,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:15,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:15,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:05:15,481 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:15,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:15,481 INFO L85 PathProgramCache]: Analyzing trace with hash -587706807, now seen corresponding path program 1 times [2023-11-06 23:05:15,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:15,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045490943] [2023-11-06 23:05:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:15,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045490943] [2023-11-06 23:05:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045490943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624635312] [2023-11-06 23:05:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:16,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:16,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:05:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:16,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 23:05:16,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:16,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:05:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:16,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-11-06 23:05:16,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:16,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:16,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 23:05:16,644 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2023-11-06 23:05:16,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2023-11-06 23:05:17,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 39 [2023-11-06 23:05:17,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:17,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 59 [2023-11-06 23:05:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:17,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:17,227 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_379 (Array Int Int))) (<= 0 (+ (* (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_379) |c_~#queue~0.base|) .cse0) 4) |c_~#queue~0.offset|))) (forall ((v_ArrVal_379 (Array Int Int))) (<= (+ (* (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_379) |c_~#queue~0.base|) .cse0) 4) |c_~#queue~0.offset| 4) (select |c_#length| |c_~#queue~0.base|))))) is different from false [2023-11-06 23:05:17,303 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1))))) (.cse1 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_379 (Array Int Int))) (<= (+ (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_379) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset| 4) (select |c_#length| |c_~#queue~0.base|))) (forall ((v_ArrVal_379 (Array Int Int))) (<= 0 (+ (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_379) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset|))))) is different from false [2023-11-06 23:05:17,345 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse2 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (let ((.cse1 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|)) (.cse3 (+ (select .cse0 .cse2) 1)) (.cse4 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_376 Int) (v_ArrVal_379 (Array Int Int))) (<= (+ (* (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 .cse1 v_ArrVal_376) .cse2 .cse3)) |c_~#stored_elements~0.base| v_ArrVal_379) |c_~#queue~0.base|) .cse4) 4) |c_~#queue~0.offset| 4) (select |c_#length| |c_~#queue~0.base|))) (forall ((v_ArrVal_376 Int) (v_ArrVal_379 (Array Int Int))) (<= 0 (+ (* (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 .cse1 v_ArrVal_376) .cse2 .cse3)) |c_~#stored_elements~0.base| v_ArrVal_379) |c_~#queue~0.base|) .cse4) 4) |c_~#queue~0.offset|)))))) is different from false [2023-11-06 23:05:17,365 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:17,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 94 [2023-11-06 23:05:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:21,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624635312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:21,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:21,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 23 [2023-11-06 23:05:21,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429938092] [2023-11-06 23:05:21,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:21,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:05:21,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:05:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=362, Unknown=7, NotChecked=126, Total=600 [2023-11-06 23:05:21,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 691 [2023-11-06 23:05:21,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 453 flow. Second operand has 25 states, 25 states have (on average 189.56) internal successors, (4739), 25 states have internal predecessors, (4739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:21,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:21,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 691 [2023-11-06 23:05:21,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:24,701 INFO L124 PetriNetUnfolderBase]: 826/1660 cut-off events. [2023-11-06 23:05:24,701 INFO L125 PetriNetUnfolderBase]: For 1585/1585 co-relation queries the response was YES. [2023-11-06 23:05:24,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 1660 events. 826/1660 cut-off events. For 1585/1585 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9815 event pairs, 568 based on Foata normal form. 9/1544 useless extension candidates. Maximal degree in co-relation 4436. Up to 1255 conditions per place. [2023-11-06 23:05:24,716 INFO L140 encePairwiseOnDemand]: 679/691 looper letters, 103 selfloop transitions, 31 changer transitions 0/140 dead transitions. [2023-11-06 23:05:24,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 140 transitions, 1011 flow [2023-11-06 23:05:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:05:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 23:05:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2934 transitions. [2023-11-06 23:05:24,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.283068017366136 [2023-11-06 23:05:24,733 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2934 transitions. [2023-11-06 23:05:24,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2934 transitions. [2023-11-06 23:05:24,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:24,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2934 transitions. [2023-11-06 23:05:24,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 195.6) internal successors, (2934), 15 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:24,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 691.0) internal successors, (11056), 16 states have internal predecessors, (11056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:24,766 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 691.0) internal successors, (11056), 16 states have internal predecessors, (11056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:24,766 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 453 flow. Second operand 15 states and 2934 transitions. [2023-11-06 23:05:24,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 140 transitions, 1011 flow [2023-11-06 23:05:24,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 140 transitions, 973 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-06 23:05:24,779 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 711 flow [2023-11-06 23:05:24,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=711, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2023-11-06 23:05:24,780 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 2 predicate places. [2023-11-06 23:05:24,781 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 711 flow [2023-11-06 23:05:24,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 189.56) internal successors, (4739), 25 states have internal predecessors, (4739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:24,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:24,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:24,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:24,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:24,990 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:05:24,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash 508345799, now seen corresponding path program 1 times [2023-11-06 23:05:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:24,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351883041] [2023-11-06 23:05:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:26,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:26,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351883041] [2023-11-06 23:05:26,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351883041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:26,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265981164] [2023-11-06 23:05:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:26,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:26,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:26,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:26,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:05:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 23:05:26,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:26,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:26,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:26,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 23:05:26,503 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-06 23:05:26,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-11-06 23:05:26,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:26,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-11-06 23:05:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:26,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:26,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:26,541 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:05:26,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-06 23:05:26,661 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2023-11-06 23:05:26,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2023-11-06 23:05:27,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2023-11-06 23:05:27,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 39 [2023-11-06 23:05:27,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:27,421 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 59 [2023-11-06 23:05:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:27,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:27,772 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1))))) (.cse1 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_443 (Array Int Int))) (<= 0 (+ |c_~#queue~0.offset| (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_443) |c_~#queue~0.base|) .cse1) 4)))) (forall ((v_ArrVal_443 (Array Int Int))) (<= (+ |c_~#queue~0.offset| (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_443) |c_~#queue~0.base|) .cse1) 4) 4) (select |c_#length| |c_~#queue~0.base|))))) is different from false [2023-11-06 23:05:27,800 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse2 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (let ((.cse1 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|)) (.cse3 (+ (select .cse0 .cse2) 1)) (.cse4 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_441 Int) (v_ArrVal_443 (Array Int Int))) (<= 0 (+ |c_~#queue~0.offset| (* (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 .cse1 v_ArrVal_441) .cse2 .cse3)) |c_~#stored_elements~0.base| v_ArrVal_443) |c_~#queue~0.base|) .cse4) 4)))) (forall ((v_ArrVal_441 Int) (v_ArrVal_443 (Array Int Int))) (<= (+ |c_~#queue~0.offset| (* (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 .cse1 v_ArrVal_441) .cse2 .cse3)) |c_~#stored_elements~0.base| v_ArrVal_443) |c_~#queue~0.base|) .cse4) 4) 4) (select |c_#length| |c_~#queue~0.base|)))))) is different from false [2023-11-06 23:05:27,820 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:27,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 94 [2023-11-06 23:05:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:28,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265981164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:28,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:28,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 26 [2023-11-06 23:05:28,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940946205] [2023-11-06 23:05:28,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:28,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:05:28,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:28,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:05:28,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=528, Unknown=21, NotChecked=98, Total=756 [2023-11-06 23:05:29,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 691 [2023-11-06 23:05:29,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 711 flow. Second operand has 28 states, 28 states have (on average 183.5) internal successors, (5138), 28 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:29,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 691 [2023-11-06 23:05:29,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:32,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:05:47,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:50,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:55,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:57,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:59,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:01,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:03,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:06,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:08,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:11,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:16,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:20,147 INFO L124 PetriNetUnfolderBase]: 1329/2671 cut-off events. [2023-11-06 23:06:20,147 INFO L125 PetriNetUnfolderBase]: For 2942/2942 co-relation queries the response was YES. [2023-11-06 23:06:20,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7274 conditions, 2671 events. 1329/2671 cut-off events. For 2942/2942 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17015 event pairs, 423 based on Foata normal form. 14/2501 useless extension candidates. Maximal degree in co-relation 7247. Up to 1330 conditions per place. [2023-11-06 23:06:20,173 INFO L140 encePairwiseOnDemand]: 673/691 looper letters, 195 selfloop transitions, 64 changer transitions 0/265 dead transitions. [2023-11-06 23:06:20,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 265 transitions, 1788 flow [2023-11-06 23:06:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:06:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 23:06:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4229 transitions. [2023-11-06 23:06:20,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27818708064728326 [2023-11-06 23:06:20,191 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4229 transitions. [2023-11-06 23:06:20,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4229 transitions. [2023-11-06 23:06:20,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:20,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4229 transitions. [2023-11-06 23:06:20,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 192.22727272727272) internal successors, (4229), 22 states have internal predecessors, (4229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:20,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 691.0) internal successors, (15893), 23 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:20,236 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 691.0) internal successors, (15893), 23 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:20,236 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 711 flow. Second operand 22 states and 4229 transitions. [2023-11-06 23:06:20,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 265 transitions, 1788 flow [2023-11-06 23:06:20,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 265 transitions, 1675 flow, removed 52 selfloop flow, removed 3 redundant places. [2023-11-06 23:06:20,266 INFO L231 Difference]: Finished difference. Result has 138 places, 138 transitions, 1071 flow [2023-11-06 23:06:20,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1071, PETRI_PLACES=138, PETRI_TRANSITIONS=138} [2023-11-06 23:06:20,267 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 32 predicate places. [2023-11-06 23:06:20,267 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 138 transitions, 1071 flow [2023-11-06 23:06:20,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 183.5) internal successors, (5138), 28 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:20,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:20,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:20,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 23:06:20,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:20,477 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:06:20,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash 206006331, now seen corresponding path program 2 times [2023-11-06 23:06:20,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737701172] [2023-11-06 23:06:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:20,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:21,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:21,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737701172] [2023-11-06 23:06:21,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737701172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:21,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927618820] [2023-11-06 23:06:21,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:06:21,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:21,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:21,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:21,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:06:22,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:22,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 23:06:22,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:22,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:22,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 23:06:22,199 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-06 23:06:22,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-11-06 23:06:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:22,247 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-11-06 23:06:22,248 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 18 [2023-11-06 23:06:22,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:22,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-11-06 23:06:22,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2023-11-06 23:06:22,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2023-11-06 23:06:22,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2023-11-06 23:06:23,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 39 [2023-11-06 23:06:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:23,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 59 [2023-11-06 23:06:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:23,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:23,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-06 23:06:23,497 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_507 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse0) 401)) (forall ((v_ArrVal_507 (Array Int Int))) (<= 0 (+ (* (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse0) 4) |c_~#queue~0.offset|))))) is different from false [2023-11-06 23:06:23,519 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604) (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1)))) (.cse1 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_507 (Array Int Int))) (<= (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse1) 401)) (forall ((v_ArrVal_507 (Array Int Int))) (<= 0 (+ (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset|))))) is different from false [2023-11-06 23:06:23,691 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse2 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (let ((.cse1 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|)) (.cse3 (+ (select .cse0 .cse2) 1)) (.cse4 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_507 (Array Int Int)) (v_ArrVal_504 Int)) (<= 0 (+ (* 4 (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 .cse1 v_ArrVal_504) .cse2 .cse3)) |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse4)) |c_~#queue~0.offset|))) (forall ((v_ArrVal_507 (Array Int Int)) (v_ArrVal_504 Int)) (<= (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 .cse1 v_ArrVal_504) .cse2 .cse3)) |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse4) 401))))) is different from false [2023-11-06 23:06:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:25,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927618820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:25,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:25,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 24 [2023-11-06 23:06:25,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720948983] [2023-11-06 23:06:25,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:25,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:06:25,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:25,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:06:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=392, Unknown=34, NotChecked=132, Total=650 [2023-11-06 23:06:25,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 691 [2023-11-06 23:06:25,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 138 transitions, 1071 flow. Second operand has 26 states, 26 states have (on average 183.6153846153846) internal successors, (4774), 26 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:25,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:25,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 691 [2023-11-06 23:06:25,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:33,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:06:35,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:06:37,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:06:40,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:06:47,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:57,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:07:00,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:07:02,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:07:04,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:07:08,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:07:09,452 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse4 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (let ((.cse0 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store .cse3 .cse4 (+ (select .cse3 .cse4) 1)))) (.cse2 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store .cse3 .cse4 (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1)))) (.cse1 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_507 (Array Int Int))) (<= 0 (+ |c_~#queue~0.offset| (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse1) 4)))) (forall ((v_ArrVal_507 (Array Int Int))) (<= (select (select (store .cse2 |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse1) 401)) (forall ((v_ArrVal_507 (Array Int Int))) (<= (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse1) 401)) (forall ((v_ArrVal_507 (Array Int Int))) (<= 0 (+ (* (select (select (store .cse2 |c_~#stored_elements~0.base| v_ArrVal_507) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset|)))))) is different from false [2023-11-06 23:07:11,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:07:14,870 INFO L124 PetriNetUnfolderBase]: 1689/3410 cut-off events. [2023-11-06 23:07:14,870 INFO L125 PetriNetUnfolderBase]: For 8744/8872 co-relation queries the response was YES. [2023-11-06 23:07:14,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12299 conditions, 3410 events. 1689/3410 cut-off events. For 8744/8872 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 22679 event pairs, 620 based on Foata normal form. 22/3215 useless extension candidates. Maximal degree in co-relation 12259. Up to 1437 conditions per place. [2023-11-06 23:07:14,903 INFO L140 encePairwiseOnDemand]: 670/691 looper letters, 186 selfloop transitions, 93 changer transitions 0/285 dead transitions. [2023-11-06 23:07:14,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 285 transitions, 2540 flow [2023-11-06 23:07:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:07:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 23:07:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4758 transitions. [2023-11-06 23:07:14,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27542691751085385 [2023-11-06 23:07:14,915 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4758 transitions. [2023-11-06 23:07:14,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4758 transitions. [2023-11-06 23:07:14,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:14,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4758 transitions. [2023-11-06 23:07:14,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 190.32) internal successors, (4758), 25 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:14,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 691.0) internal successors, (17966), 26 states have internal predecessors, (17966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:14,959 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 691.0) internal successors, (17966), 26 states have internal predecessors, (17966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:14,960 INFO L175 Difference]: Start difference. First operand has 138 places, 138 transitions, 1071 flow. Second operand 25 states and 4758 transitions. [2023-11-06 23:07:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 285 transitions, 2540 flow [2023-11-06 23:07:14,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 285 transitions, 2486 flow, removed 27 selfloop flow, removed 0 redundant places. [2023-11-06 23:07:15,003 INFO L231 Difference]: Finished difference. Result has 173 places, 189 transitions, 1815 flow [2023-11-06 23:07:15,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1815, PETRI_PLACES=173, PETRI_TRANSITIONS=189} [2023-11-06 23:07:15,004 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 67 predicate places. [2023-11-06 23:07:15,004 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 189 transitions, 1815 flow [2023-11-06 23:07:15,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 183.6153846153846) internal successors, (4774), 26 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:15,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:15,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:15,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:15,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:15,213 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:07:15,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:15,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1741436863, now seen corresponding path program 1 times [2023-11-06 23:07:15,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:15,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306426316] [2023-11-06 23:07:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:15,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:15,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:15,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306426316] [2023-11-06 23:07:15,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306426316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:15,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:15,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:07:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764293954] [2023-11-06 23:07:15,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:15,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:15,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:15,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 691 [2023-11-06 23:07:15,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 189 transitions, 1815 flow. Second operand has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:15,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:15,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 691 [2023-11-06 23:07:15,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:16,337 INFO L124 PetriNetUnfolderBase]: 1673/3394 cut-off events. [2023-11-06 23:07:16,337 INFO L125 PetriNetUnfolderBase]: For 21866/22247 co-relation queries the response was YES. [2023-11-06 23:07:16,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16289 conditions, 3394 events. 1673/3394 cut-off events. For 21866/22247 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22832 event pairs, 836 based on Foata normal form. 13/3174 useless extension candidates. Maximal degree in co-relation 16237. Up to 1618 conditions per place. [2023-11-06 23:07:16,405 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 179 selfloop transitions, 3 changer transitions 0/201 dead transitions. [2023-11-06 23:07:16,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 201 transitions, 2281 flow [2023-11-06 23:07:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-11-06 23:07:16,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331886155330439 [2023-11-06 23:07:16,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-11-06 23:07:16,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-11-06 23:07:16,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:16,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-11-06 23:07:16,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:16,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:16,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:16,415 INFO L175 Difference]: Start difference. First operand has 173 places, 189 transitions, 1815 flow. Second operand 3 states and 898 transitions. [2023-11-06 23:07:16,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 201 transitions, 2281 flow [2023-11-06 23:07:16,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 201 transitions, 2093 flow, removed 90 selfloop flow, removed 2 redundant places. [2023-11-06 23:07:16,487 INFO L231 Difference]: Finished difference. Result has 169 places, 187 transitions, 1624 flow [2023-11-06 23:07:16,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1624, PETRI_PLACES=169, PETRI_TRANSITIONS=187} [2023-11-06 23:07:16,488 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 63 predicate places. [2023-11-06 23:07:16,489 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 187 transitions, 1624 flow [2023-11-06 23:07:16,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:16,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:16,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:16,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 23:07:16,490 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:07:16,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2107589623, now seen corresponding path program 1 times [2023-11-06 23:07:16,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:16,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186529610] [2023-11-06 23:07:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:16,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:17,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:17,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186529610] [2023-11-06 23:07:17,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186529610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:17,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842053213] [2023-11-06 23:07:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:17,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:17,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:17,646 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:17,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:07:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:17,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:07:17,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:17,862 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-06 23:07:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:17,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:07:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:18,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:18,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842053213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:18,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:18,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 3, 3] total 16 [2023-11-06 23:07:18,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111583201] [2023-11-06 23:07:18,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:18,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:07:18,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:07:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:07:27,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 691 [2023-11-06 23:07:27,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 187 transitions, 1624 flow. Second operand has 17 states, 17 states have (on average 261.3529411764706) internal successors, (4443), 17 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:27,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:27,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 691 [2023-11-06 23:07:27,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:31,245 INFO L124 PetriNetUnfolderBase]: 2275/4528 cut-off events. [2023-11-06 23:07:31,245 INFO L125 PetriNetUnfolderBase]: For 32304/32700 co-relation queries the response was YES. [2023-11-06 23:07:31,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22458 conditions, 4528 events. 2275/4528 cut-off events. For 32304/32700 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 29400 event pairs, 806 based on Foata normal form. 98/4337 useless extension candidates. Maximal degree in co-relation 22405. Up to 1586 conditions per place. [2023-11-06 23:07:31,292 INFO L140 encePairwiseOnDemand]: 678/691 looper letters, 294 selfloop transitions, 62 changer transitions 0/361 dead transitions. [2023-11-06 23:07:31,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 361 transitions, 3855 flow [2023-11-06 23:07:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:07:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 23:07:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5919 transitions. [2023-11-06 23:07:31,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38935666359689514 [2023-11-06 23:07:31,305 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5919 transitions. [2023-11-06 23:07:31,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5919 transitions. [2023-11-06 23:07:31,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:31,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5919 transitions. [2023-11-06 23:07:31,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 269.04545454545456) internal successors, (5919), 22 states have internal predecessors, (5919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:31,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 691.0) internal successors, (15893), 23 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:31,338 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 691.0) internal successors, (15893), 23 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:31,338 INFO L175 Difference]: Start difference. First operand has 169 places, 187 transitions, 1624 flow. Second operand 22 states and 5919 transitions. [2023-11-06 23:07:31,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 361 transitions, 3855 flow [2023-11-06 23:07:31,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 361 transitions, 3788 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-06 23:07:31,420 INFO L231 Difference]: Finished difference. Result has 189 places, 195 transitions, 1852 flow [2023-11-06 23:07:31,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1852, PETRI_PLACES=189, PETRI_TRANSITIONS=195} [2023-11-06 23:07:31,421 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 83 predicate places. [2023-11-06 23:07:31,421 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 195 transitions, 1852 flow [2023-11-06 23:07:31,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 261.3529411764706) internal successors, (4443), 17 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:31,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:31,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:31,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 23:07:31,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:31,629 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 23:07:31,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:31,630 INFO L85 PathProgramCache]: Analyzing trace with hash 513052190, now seen corresponding path program 3 times [2023-11-06 23:07:31,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:31,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325582406] [2023-11-06 23:07:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:31,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:34,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:34,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325582406] [2023-11-06 23:07:34,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325582406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:34,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544817075] [2023-11-06 23:07:34,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:07:34,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:34,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:34,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:34,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_330878bf-6804-40b7-8cec-11f825f43cbe/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:07:34,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:07:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:34,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-06 23:07:34,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:34,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:07:34,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:34,945 INFO L322 Elim1Store]: treesize reduction 13, result has 59.4 percent of original size [2023-11-06 23:07:34,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 19 [2023-11-06 23:07:34,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:35,014 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:07:35,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2023-11-06 23:07:35,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:35,130 INFO L322 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-06 23:07:35,130 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2023-11-06 23:07:35,368 INFO L322 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-06 23:07:35,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 36 [2023-11-06 23:07:35,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:35,497 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:07:35,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2023-11-06 23:07:35,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:35,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-11-06 23:07:36,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 57 [2023-11-06 23:07:36,399 INFO L322 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-11-06 23:07:36,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-11-06 23:07:36,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2023-11-06 23:07:36,999 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 60 [2023-11-06 23:07:37,058 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-06 23:07:37,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 60 [2023-11-06 23:07:37,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2023-11-06 23:07:37,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:37,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 80 [2023-11-06 23:07:38,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 96 [2023-11-06 23:07:38,398 INFO L322 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-11-06 23:07:38,398 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-11-06 23:07:38,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 343 treesize of output 278 [2023-11-06 23:07:40,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1017 treesize of output 846 [2023-11-06 23:07:41,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:41,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3255 treesize of output 2776 [2023-11-06 23:07:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:41,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:41,956 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604) (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1)))) (.cse1 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_681 (Array Int Int))) (<= 0 (+ (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_681) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset|))) (forall ((v_ArrVal_681 (Array Int Int))) (<= (+ (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_681) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset| 4) (select |c_#length| |c_~#queue~0.base|))))) is different from false [2023-11-06 23:07:41,981 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1))))) (.cse1 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_681 (Array Int Int))) (<= 0 (+ (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_681) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset|))) (forall ((v_ArrVal_681 (Array Int Int))) (<= (+ (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_681) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset| 4) (select |c_#length| |c_~#queue~0.base|))))) is different from false [2023-11-06 23:07:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-06 23:07:52,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544817075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:52,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:52,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 15] total 41 [2023-11-06 23:07:52,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621955759] [2023-11-06 23:07:52,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 23:07:52,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 23:07:52,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1364, Unknown=47, NotChecked=158, Total=1806 [2023-11-06 23:07:58,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 691 [2023-11-06 23:07:58,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 195 transitions, 1852 flow. Second operand has 43 states, 43 states have (on average 183.53488372093022) internal successors, (7892), 43 states have internal predecessors, (7892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:58,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:58,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 691 [2023-11-06 23:07:58,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:05,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:08:08,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:08:11,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:08:15,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]