./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:01,707 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:01,777 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:41:01,782 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:01,783 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:01,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:01,825 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:01,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:01,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:41:01,827 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:41:01,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:01,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:01,829 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:01,830 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:01,830 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:01,831 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:01,831 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:01,832 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:01,833 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:41:01,833 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:41:01,834 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:41:01,835 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:41:01,835 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:41:01,836 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:41:01,836 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:01,837 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:01,838 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:01,838 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:01,839 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:41:01,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:01,840 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:01,840 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:41:01,840 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:01,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:41:01,847 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:41:01,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:41:01,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:41:01,849 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:41:01,849 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_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2023-11-19 07:41:02,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:02,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:02,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:02,139 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:02,140 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:02,141 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-19 07:41:05,326 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:05,649 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:05,649 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-19 07:41:05,672 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/data/0e9ef319a/74886c087eb34d07b2227335d7030047/FLAGfacfba3d6 [2023-11-19 07:41:05,698 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/data/0e9ef319a/74886c087eb34d07b2227335d7030047 [2023-11-19 07:41:05,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:05,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:05,708 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:05,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:05,714 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:05,718 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,720 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a3c5c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05, skipping insertion in model container [2023-11-19 07:41:05,720 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,805 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:06,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:06,452 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:06,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:06,608 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:06,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06 WrapperNode [2023-11-19 07:41:06,608 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:06,610 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:06,610 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:06,610 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:06,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,681 INFO L138 Inliner]: procedures = 274, calls = 59, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 208 [2023-11-19 07:41:06,681 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:06,682 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:06,682 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:06,683 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:06,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,714 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,720 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,723 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,738 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,750 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:06,751 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:06,751 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:06,751 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:06,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (1/1) ... [2023-11-19 07:41:06,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:06,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:06,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:06,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:06,833 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:41:06,833 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:41:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:41:06,834 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:41:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:41:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:41:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:41:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:41:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:41:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:06,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:06,836 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:41:07,015 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:07,018 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:07,550 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:07,564 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:07,564 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:41:07,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:07 BoogieIcfgContainer [2023-11-19 07:41:07,578 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:07,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:07,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:07,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:07,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:05" (1/3) ... [2023-11-19 07:41:07,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d09a94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:07, skipping insertion in model container [2023-11-19 07:41:07,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06" (2/3) ... [2023-11-19 07:41:07,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d09a94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:07, skipping insertion in model container [2023-11-19 07:41:07,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:07" (3/3) ... [2023-11-19 07:41:07,591 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2023-11-19 07:41:07,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:07,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2023-11-19 07:41:07,612 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:41:07,839 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:41:07,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 298 transitions, 610 flow [2023-11-19 07:41:08,074 INFO L124 PetriNetUnfolderBase]: 15/296 cut-off events. [2023-11-19 07:41:08,075 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:41:08,087 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. [2023-11-19 07:41:08,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 298 transitions, 610 flow [2023-11-19 07:41:08,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 291 transitions, 594 flow [2023-11-19 07:41:08,109 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:41:08,121 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 291 transitions, 594 flow [2023-11-19 07:41:08,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 291 transitions, 594 flow [2023-11-19 07:41:08,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 291 transitions, 594 flow [2023-11-19 07:41:08,219 INFO L124 PetriNetUnfolderBase]: 15/291 cut-off events. [2023-11-19 07:41:08,219 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:41:08,224 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. [2023-11-19 07:41:08,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 19748 [2023-11-19 07:41:24,743 INFO L134 LiptonReduction]: Checked pairs total: 61464 [2023-11-19 07:41:24,744 INFO L136 LiptonReduction]: Total number of compositions: 393 [2023-11-19 07:41:24,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:24,771 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;@37af5d73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:24,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-11-19 07:41:24,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:41:24,777 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:41:24,777 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:41:24,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:24,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:41:24,778 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)] === [2023-11-19 07:41:24,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1256, now seen corresponding path program 1 times [2023-11-19 07:41:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:24,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728642044] [2023-11-19 07:41:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:24,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:24,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:24,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728642044] [2023-11-19 07:41:24,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728642044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:24,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:24,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:41:24,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009891246] [2023-11-19 07:41:24,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:24,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:41:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:24,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:41:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:41:24,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 691 [2023-11-19 07:41:24,968 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) [2023-11-19 07:41:24,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:24,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 691 [2023-11-19 07:41:24,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:26,072 INFO L124 PetriNetUnfolderBase]: 4087/6349 cut-off events. [2023-11-19 07:41:26,073 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-19 07:41:26,082 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. [2023-11-19 07:41:26,133 INFO L140 encePairwiseOnDemand]: 655/691 looper letters, 63 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2023-11-19 07:41:26,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 278 flow [2023-11-19 07:41:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:41:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:41:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 669 transitions. [2023-11-19 07:41:26,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4840810419681621 [2023-11-19 07:41:26,153 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 669 transitions. [2023-11-19 07:41:26,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 669 transitions. [2023-11-19 07:41:26,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:26,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 669 transitions. [2023-11-19 07:41:26,164 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) [2023-11-19 07:41:26,173 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) [2023-11-19 07:41:26,176 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) [2023-11-19 07:41:26,178 INFO L175 Difference]: Start difference. First operand has 106 places, 106 transitions, 224 flow. Second operand 2 states and 669 transitions. [2023-11-19 07:41:26,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 278 flow [2023-11-19 07:41:26,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:41:26,192 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 144 flow [2023-11-19 07:41:26,194 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} [2023-11-19 07:41:26,198 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -39 predicate places. [2023-11-19 07:41:26,199 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 144 flow [2023-11-19 07:41:26,200 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) [2023-11-19 07:41:26,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:26,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:41:26,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:41:26,202 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)] === [2023-11-19 07:41:26,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1245768, now seen corresponding path program 1 times [2023-11-19 07:41:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:26,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837304861] [2023-11-19 07:41:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:26,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:26,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:26,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837304861] [2023-11-19 07:41:26,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837304861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:26,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:26,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:41:26,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276304807] [2023-11-19 07:41:26,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:26,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:26,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:26,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 691 [2023-11-19 07:41:26,652 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) [2023-11-19 07:41:26,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:26,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 691 [2023-11-19 07:41:26,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:27,548 INFO L124 PetriNetUnfolderBase]: 4037/6251 cut-off events. [2023-11-19 07:41:27,548 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 07:41:27,555 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. [2023-11-19 07:41:27,604 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 59 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-19 07:41:27,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 262 flow [2023-11-19 07:41:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2023-11-19 07:41:27,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283646888567294 [2023-11-19 07:41:27,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2023-11-19 07:41:27,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2023-11-19 07:41:27,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:27,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2023-11-19 07:41:27,615 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) [2023-11-19 07:41:27,623 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) [2023-11-19 07:41:27,626 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) [2023-11-19 07:41:27,626 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 144 flow. Second operand 3 states and 888 transitions. [2023-11-19 07:41:27,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 262 flow [2023-11-19 07:41:27,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:41:27,631 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 144 flow [2023-11-19 07:41:27,632 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} [2023-11-19 07:41:27,636 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -39 predicate places. [2023-11-19 07:41:27,636 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 144 flow [2023-11-19 07:41:27,637 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) [2023-11-19 07:41:27,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:27,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:41:27,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:41:27,640 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)] === [2023-11-19 07:41:27,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:27,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1245769, now seen corresponding path program 1 times [2023-11-19 07:41:27,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:27,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134033596] [2023-11-19 07:41:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:27,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:27,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:27,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134033596] [2023-11-19 07:41:27,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134033596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:27,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:27,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:41:27,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416460267] [2023-11-19 07:41:27,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:27,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:27,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:28,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 691 [2023-11-19 07:41:28,068 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) [2023-11-19 07:41:28,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:28,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 691 [2023-11-19 07:41:28,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:28,980 INFO L124 PetriNetUnfolderBase]: 3987/6153 cut-off events. [2023-11-19 07:41:28,980 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 07:41:28,989 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. [2023-11-19 07:41:29,024 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 57 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 07:41:29,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 258 flow [2023-11-19 07:41:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-11-19 07:41:29,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331886155330439 [2023-11-19 07:41:29,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-11-19 07:41:29,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-11-19 07:41:29,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:29,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-11-19 07:41:29,034 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) [2023-11-19 07:41:29,041 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) [2023-11-19 07:41:29,043 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) [2023-11-19 07:41:29,044 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 144 flow. Second operand 3 states and 898 transitions. [2023-11-19 07:41:29,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 258 flow [2023-11-19 07:41:29,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:29,047 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 140 flow [2023-11-19 07:41:29,047 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} [2023-11-19 07:41:29,049 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -41 predicate places. [2023-11-19 07:41:29,049 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 140 flow [2023-11-19 07:41:29,050 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) [2023-11-19 07:41:29,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:29,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:41:29,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:41:29,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:29,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:29,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1197200326, now seen corresponding path program 1 times [2023-11-19 07:41:29,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:29,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042677301] [2023-11-19 07:41:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:29,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:29,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:29,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042677301] [2023-11-19 07:41:29,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042677301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:29,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:29,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:41:29,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778935068] [2023-11-19 07:41:29,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:29,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:29,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:29,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:29,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 691 [2023-11-19 07:41:29,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:29,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:29,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 691 [2023-11-19 07:41:29,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:30,750 INFO L124 PetriNetUnfolderBase]: 4092/6372 cut-off events. [2023-11-19 07:41:30,750 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 07:41:30,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12663 conditions, 6372 events. 4092/6372 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 35325 event pairs, 3006 based on Foata normal form. 0/3179 useless extension candidates. Maximal degree in co-relation 12659. Up to 6257 conditions per place. [2023-11-19 07:41:30,789 INFO L140 encePairwiseOnDemand]: 685/691 looper letters, 65 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-19 07:41:30,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 296 flow [2023-11-19 07:41:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 887 transitions. [2023-11-19 07:41:30,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278822961890979 [2023-11-19 07:41:30,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 887 transitions. [2023-11-19 07:41:30,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 887 transitions. [2023-11-19 07:41:30,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:30,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 887 transitions. [2023-11-19 07:41:30,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.6666666666667) internal successors, (887), 3 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:30,805 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) [2023-11-19 07:41:30,807 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) [2023-11-19 07:41:30,807 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 140 flow. Second operand 3 states and 887 transitions. [2023-11-19 07:41:30,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 296 flow [2023-11-19 07:41:30,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:30,813 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 164 flow [2023-11-19 07:41:30,814 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=164, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-11-19 07:41:30,815 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -40 predicate places. [2023-11-19 07:41:30,815 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 164 flow [2023-11-19 07:41:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:30,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:30,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:41:30,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:41:30,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:30,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1197200324, now seen corresponding path program 1 times [2023-11-19 07:41:30,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000759833] [2023-11-19 07:41:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:30,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:30,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000759833] [2023-11-19 07:41:30,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000759833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:30,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:30,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:41:30,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948548661] [2023-11-19 07:41:30,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:30,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:30,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:30,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:30,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:31,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 691 [2023-11-19 07:41:31,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 164 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) [2023-11-19 07:41:31,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:31,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 691 [2023-11-19 07:41:31,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:31,724 INFO L124 PetriNetUnfolderBase]: 3525/5435 cut-off events. [2023-11-19 07:41:31,725 INFO L125 PetriNetUnfolderBase]: For 231/322 co-relation queries the response was YES. [2023-11-19 07:41:31,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11125 conditions, 5435 events. 3525/5435 cut-off events. For 231/322 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 29043 event pairs, 2925 based on Foata normal form. 0/3035 useless extension candidates. Maximal degree in co-relation 11120. Up to 5334 conditions per place. [2023-11-19 07:41:31,768 INFO L140 encePairwiseOnDemand]: 686/691 looper letters, 56 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 07:41:31,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 274 flow [2023-11-19 07:41:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 905 transitions. [2023-11-19 07:41:31,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365653642064641 [2023-11-19 07:41:31,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 905 transitions. [2023-11-19 07:41:31,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 905 transitions. [2023-11-19 07:41:31,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:31,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 905 transitions. [2023-11-19 07:41:31,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:31,786 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) [2023-11-19 07:41:31,789 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) [2023-11-19 07:41:31,789 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 164 flow. Second operand 3 states and 905 transitions. [2023-11-19 07:41:31,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 274 flow [2023-11-19 07:41:31,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:31,792 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 158 flow [2023-11-19 07:41:31,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, 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=158, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-11-19 07:41:31,793 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -42 predicate places. [2023-11-19 07:41:31,794 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 158 flow [2023-11-19 07:41:31,795 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) [2023-11-19 07:41:31,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:31,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:41:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:41:31,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:31,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1197212169, now seen corresponding path program 1 times [2023-11-19 07:41:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:31,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108595143] [2023-11-19 07:41:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:31,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:31,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:31,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108595143] [2023-11-19 07:41:31,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108595143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:31,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:31,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:31,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215431645] [2023-11-19 07:41:31,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:31,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:41:31,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:31,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:41:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:41:32,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 691 [2023-11-19 07:41:32,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 158 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) [2023-11-19 07:41:32,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:32,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 691 [2023-11-19 07:41:32,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:32,594 INFO L124 PetriNetUnfolderBase]: 2559/4017 cut-off events. [2023-11-19 07:41:32,594 INFO L125 PetriNetUnfolderBase]: For 183/251 co-relation queries the response was YES. [2023-11-19 07:41:32,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8231 conditions, 4017 events. 2559/4017 cut-off events. For 183/251 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 20817 event pairs, 2103 based on Foata normal form. 0/2425 useless extension candidates. Maximal degree in co-relation 8226. Up to 3936 conditions per place. [2023-11-19 07:41:32,623 INFO L140 encePairwiseOnDemand]: 688/691 looper letters, 55 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-19 07:41:32,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 270 flow [2023-11-19 07:41:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2023-11-19 07:41:32,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4191992281717318 [2023-11-19 07:41:32,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2023-11-19 07:41:32,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2023-11-19 07:41:32,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:32,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2023-11-19 07:41:32,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:32,641 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) [2023-11-19 07:41:32,643 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) [2023-11-19 07:41:32,644 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 158 flow. Second operand 3 states and 869 transitions. [2023-11-19 07:41:32,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 270 flow [2023-11-19 07:41:32,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:32,650 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 156 flow [2023-11-19 07:41:32,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-11-19 07:41:32,654 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -43 predicate places. [2023-11-19 07:41:32,654 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 156 flow [2023-11-19 07:41:32,656 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) [2023-11-19 07:41:32,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:32,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:41:32,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:41:32,656 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)] === [2023-11-19 07:41:32,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1197212170, now seen corresponding path program 1 times [2023-11-19 07:41:32,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:32,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186144477] [2023-11-19 07:41:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:32,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:32,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:32,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186144477] [2023-11-19 07:41:32,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186144477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:32,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:32,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:41:32,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514385585] [2023-11-19 07:41:32,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:32,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:32,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:32,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 691 [2023-11-19 07:41:32,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:32,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:32,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 691 [2023-11-19 07:41:32,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:33,404 INFO L124 PetriNetUnfolderBase]: 1593/2599 cut-off events. [2023-11-19 07:41:33,404 INFO L125 PetriNetUnfolderBase]: For 135/180 co-relation queries the response was YES. [2023-11-19 07:41:33,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5343 conditions, 2599 events. 1593/2599 cut-off events. For 135/180 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13106 event pairs, 1281 based on Foata normal form. 0/1815 useless extension candidates. Maximal degree in co-relation 5338. Up to 2538 conditions per place. [2023-11-19 07:41:33,423 INFO L140 encePairwiseOnDemand]: 688/691 looper letters, 54 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-11-19 07:41:33,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 266 flow [2023-11-19 07:41:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2023-11-19 07:41:33,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302942595272552 [2023-11-19 07:41:33,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2023-11-19 07:41:33,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2023-11-19 07:41:33,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:33,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2023-11-19 07:41:33,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:33,440 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) [2023-11-19 07:41:33,442 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) [2023-11-19 07:41:33,442 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 156 flow. Second operand 3 states and 892 transitions. [2023-11-19 07:41:33,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 266 flow [2023-11-19 07:41:33,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:33,445 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 154 flow [2023-11-19 07:41:33,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2023-11-19 07:41:33,446 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -44 predicate places. [2023-11-19 07:41:33,446 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 154 flow [2023-11-19 07:41:33,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:33,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:33,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:41:33,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:41:33,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:33,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:33,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1541341198, now seen corresponding path program 1 times [2023-11-19 07:41:33,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:33,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382584515] [2023-11-19 07:41:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:33,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:34,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:34,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382584515] [2023-11-19 07:41:34,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382584515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:34,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:34,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:34,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864824584] [2023-11-19 07:41:34,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:34,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:41:34,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:41:34,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:41:34,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 691 [2023-11-19 07:41:34,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 154 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) [2023-11-19 07:41:34,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:34,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 691 [2023-11-19 07:41:34,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:35,054 INFO L124 PetriNetUnfolderBase]: 1979/3260 cut-off events. [2023-11-19 07:41:35,055 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-11-19 07:41:35,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6711 conditions, 3260 events. 1979/3260 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17621 event pairs, 487 based on Foata normal form. 25/2316 useless extension candidates. Maximal degree in co-relation 6706. Up to 2701 conditions per place. [2023-11-19 07:41:35,074 INFO L140 encePairwiseOnDemand]: 680/691 looper letters, 77 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2023-11-19 07:41:35,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 387 flow [2023-11-19 07:41:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:41:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:41:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1164 transitions. [2023-11-19 07:41:35,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211287988422576 [2023-11-19 07:41:35,081 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1164 transitions. [2023-11-19 07:41:35,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1164 transitions. [2023-11-19 07:41:35,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:35,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1164 transitions. [2023-11-19 07:41:35,087 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) [2023-11-19 07:41:35,094 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) [2023-11-19 07:41:35,096 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) [2023-11-19 07:41:35,096 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 154 flow. Second operand 4 states and 1164 transitions. [2023-11-19 07:41:35,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 387 flow [2023-11-19 07:41:35,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 381 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:35,100 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 208 flow [2023-11-19 07:41:35,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-11-19 07:41:35,101 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -42 predicate places. [2023-11-19 07:41:35,101 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 208 flow [2023-11-19 07:41:35,102 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) [2023-11-19 07:41:35,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:35,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:41:35,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:41:35,103 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:35,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1541494502, now seen corresponding path program 1 times [2023-11-19 07:41:35,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:35,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162775427] [2023-11-19 07:41:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:35,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:35,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:35,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162775427] [2023-11-19 07:41:35,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162775427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:35,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:35,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:35,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794158478] [2023-11-19 07:41:35,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:35,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:41:35,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:35,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:41:35,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:41:35,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 691 [2023-11-19 07:41:35,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 208 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) [2023-11-19 07:41:35,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:35,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 691 [2023-11-19 07:41:35,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:36,150 INFO L124 PetriNetUnfolderBase]: 1700/2837 cut-off events. [2023-11-19 07:41:36,150 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2023-11-19 07:41:36,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6110 conditions, 2837 events. 1700/2837 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15469 event pairs, 845 based on Foata normal form. 74/2233 useless extension candidates. Maximal degree in co-relation 6104. Up to 1679 conditions per place. [2023-11-19 07:41:36,168 INFO L140 encePairwiseOnDemand]: 683/691 looper letters, 81 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-11-19 07:41:36,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 435 flow [2023-11-19 07:41:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:41:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:41:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1171 transitions. [2023-11-19 07:41:36,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236613603473227 [2023-11-19 07:41:36,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1171 transitions. [2023-11-19 07:41:36,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1171 transitions. [2023-11-19 07:41:36,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:36,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1171 transitions. [2023-11-19 07:41:36,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 292.75) internal successors, (1171), 4 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:36,186 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) [2023-11-19 07:41:36,188 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) [2023-11-19 07:41:36,188 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 208 flow. Second operand 4 states and 1171 transitions. [2023-11-19 07:41:36,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 435 flow [2023-11-19 07:41:36,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:36,194 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 187 flow [2023-11-19 07:41:36,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2023-11-19 07:41:36,196 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -43 predicate places. [2023-11-19 07:41:36,197 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 187 flow [2023-11-19 07:41:36,197 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) [2023-11-19 07:41:36,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:36,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:36,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:41:36,199 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:36,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1471121744, now seen corresponding path program 1 times [2023-11-19 07:41:36,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:36,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867637794] [2023-11-19 07:41:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:36,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:36,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867637794] [2023-11-19 07:41:36,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867637794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:36,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:36,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:36,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29967701] [2023-11-19 07:41:36,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:36,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:36,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:36,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:36,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:36,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 691 [2023-11-19 07:41:36,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 187 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) [2023-11-19 07:41:36,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:36,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 691 [2023-11-19 07:41:36,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:36,479 INFO L124 PetriNetUnfolderBase]: 452/893 cut-off events. [2023-11-19 07:41:36,480 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-19 07:41:36,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1928 conditions, 893 events. 452/893 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4555 event pairs, 274 based on Foata normal form. 40/806 useless extension candidates. Maximal degree in co-relation 1922. Up to 453 conditions per place. [2023-11-19 07:41:36,485 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 65 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-11-19 07:41:36,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 359 flow [2023-11-19 07:41:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 903 transitions. [2023-11-19 07:41:36,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356005788712012 [2023-11-19 07:41:36,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 903 transitions. [2023-11-19 07:41:36,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 903 transitions. [2023-11-19 07:41:36,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:36,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 903 transitions. [2023-11-19 07:41:36,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:36,500 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) [2023-11-19 07:41:36,502 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) [2023-11-19 07:41:36,502 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 187 flow. Second operand 3 states and 903 transitions. [2023-11-19 07:41:36,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 359 flow [2023-11-19 07:41:36,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 349 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:41:36,507 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 188 flow [2023-11-19 07:41:36,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2023-11-19 07:41:36,509 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -43 predicate places. [2023-11-19 07:41:36,510 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 188 flow [2023-11-19 07:41:36,510 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) [2023-11-19 07:41:36,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:36,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:36,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:41:36,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:36,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1024067660, now seen corresponding path program 1 times [2023-11-19 07:41:36,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:36,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519016028] [2023-11-19 07:41:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:36,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:36,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:36,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519016028] [2023-11-19 07:41:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519016028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:36,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:36,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:36,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391016481] [2023-11-19 07:41:36,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:36,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:41:36,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:36,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:41:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:41:37,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 691 [2023-11-19 07:41:37,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 281.5) internal successors, (1126), 4 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:37,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:37,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 691 [2023-11-19 07:41:37,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:37,253 INFO L124 PetriNetUnfolderBase]: 405/812 cut-off events. [2023-11-19 07:41:37,253 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-19 07:41:37,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 812 events. 405/812 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3868 event pairs, 266 based on Foata normal form. 0/691 useless extension candidates. Maximal degree in co-relation 1748. Up to 596 conditions per place. [2023-11-19 07:41:37,258 INFO L140 encePairwiseOnDemand]: 686/691 looper letters, 66 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-11-19 07:41:37,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 355 flow [2023-11-19 07:41:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:41:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:41:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1184 transitions. [2023-11-19 07:41:37,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283646888567294 [2023-11-19 07:41:37,266 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1184 transitions. [2023-11-19 07:41:37,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1184 transitions. [2023-11-19 07:41:37,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:37,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1184 transitions. [2023-11-19 07:41:37,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:37,277 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) [2023-11-19 07:41:37,278 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) [2023-11-19 07:41:37,278 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 188 flow. Second operand 4 states and 1184 transitions. [2023-11-19 07:41:37,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 355 flow [2023-11-19 07:41:37,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 341 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:37,282 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 182 flow [2023-11-19 07:41:37,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2023-11-19 07:41:37,283 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -41 predicate places. [2023-11-19 07:41:37,283 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 182 flow [2023-11-19 07:41:37,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 281.5) internal successors, (1126), 4 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:37,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:37,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:37,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:41:37,285 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:37,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:37,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1024067661, now seen corresponding path program 1 times [2023-11-19 07:41:37,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:37,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018554397] [2023-11-19 07:41:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:37,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:37,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:37,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018554397] [2023-11-19 07:41:37,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018554397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:37,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:37,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:41:37,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305959708] [2023-11-19 07:41:37,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:37,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:37,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:37,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:37,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:37,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 691 [2023-11-19 07:41:37,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:37,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:37,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 691 [2023-11-19 07:41:37,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:37,690 INFO L124 PetriNetUnfolderBase]: 381/765 cut-off events. [2023-11-19 07:41:37,690 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-19 07:41:37,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 765 events. 381/765 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3603 event pairs, 318 based on Foata normal form. 16/682 useless extension candidates. Maximal degree in co-relation 1651. Up to 709 conditions per place. [2023-11-19 07:41:37,695 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 49 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-19 07:41:37,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 282 flow [2023-11-19 07:41:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 885 transitions. [2023-11-19 07:41:37,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426917510853835 [2023-11-19 07:41:37,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 885 transitions. [2023-11-19 07:41:37,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 885 transitions. [2023-11-19 07:41:37,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:37,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 885 transitions. [2023-11-19 07:41:37,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:37,707 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) [2023-11-19 07:41:37,708 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) [2023-11-19 07:41:37,708 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 182 flow. Second operand 3 states and 885 transitions. [2023-11-19 07:41:37,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 282 flow [2023-11-19 07:41:37,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:37,711 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 180 flow [2023-11-19 07:41:37,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-11-19 07:41:37,712 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -43 predicate places. [2023-11-19 07:41:37,712 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 180 flow [2023-11-19 07:41:37,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:37,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:37,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:37,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:41:37,713 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:37,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:37,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1681325168, now seen corresponding path program 1 times [2023-11-19 07:41:37,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:37,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618946567] [2023-11-19 07:41:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:37,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:38,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:38,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618946567] [2023-11-19 07:41:38,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618946567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:38,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:38,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:41:38,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446093848] [2023-11-19 07:41:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:38,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:41:38,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:41:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:38,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 691 [2023-11-19 07:41:38,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 270.4) internal successors, (1352), 5 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:38,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:38,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 691 [2023-11-19 07:41:38,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:38,769 INFO L124 PetriNetUnfolderBase]: 395/779 cut-off events. [2023-11-19 07:41:38,769 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-19 07:41:38,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1708 conditions, 779 events. 395/779 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3665 event pairs, 318 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 1700. Up to 731 conditions per place. [2023-11-19 07:41:38,774 INFO L140 encePairwiseOnDemand]: 685/691 looper letters, 59 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2023-11-19 07:41:38,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 73 transitions, 346 flow [2023-11-19 07:41:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:41:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:41:38,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1404 transitions. [2023-11-19 07:41:38,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40636758321273514 [2023-11-19 07:41:38,781 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1404 transitions. [2023-11-19 07:41:38,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1404 transitions. [2023-11-19 07:41:38,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:38,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1404 transitions. [2023-11-19 07:41:38,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 280.8) internal successors, (1404), 5 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:38,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 691.0) internal successors, (4146), 6 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:38,793 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 691.0) internal successors, (4146), 6 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:38,794 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 180 flow. Second operand 5 states and 1404 transitions. [2023-11-19 07:41:38,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 73 transitions, 346 flow [2023-11-19 07:41:38,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:38,797 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 228 flow [2023-11-19 07:41:38,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-11-19 07:41:38,798 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -38 predicate places. [2023-11-19 07:41:38,798 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 228 flow [2023-11-19 07:41:38,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.4) internal successors, (1352), 5 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:38,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:38,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:38,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:41:38,799 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:38,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash 847883346, now seen corresponding path program 1 times [2023-11-19 07:41:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:38,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949555516] [2023-11-19 07:41:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:38,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:39,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:39,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949555516] [2023-11-19 07:41:39,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949555516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:39,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:39,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:41:39,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381761179] [2023-11-19 07:41:39,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:39,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:39,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:40,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 691 [2023-11-19 07:41:40,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 265.85714285714283) internal successors, (1861), 7 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:40,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:40,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 691 [2023-11-19 07:41:40,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:40,776 INFO L124 PetriNetUnfolderBase]: 443/869 cut-off events. [2023-11-19 07:41:40,776 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-11-19 07:41:40,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 869 events. 443/869 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4161 event pairs, 115 based on Foata normal form. 7/794 useless extension candidates. Maximal degree in co-relation 2012. Up to 653 conditions per place. [2023-11-19 07:41:40,783 INFO L140 encePairwiseOnDemand]: 683/691 looper letters, 74 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2023-11-19 07:41:40,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 474 flow [2023-11-19 07:41:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:41:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:41:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1932 transitions. [2023-11-19 07:41:40,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994211287988423 [2023-11-19 07:41:40,793 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1932 transitions. [2023-11-19 07:41:40,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1932 transitions. [2023-11-19 07:41:40,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:40,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1932 transitions. [2023-11-19 07:41:40,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:40,809 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) [2023-11-19 07:41:40,811 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) [2023-11-19 07:41:40,811 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 228 flow. Second operand 7 states and 1932 transitions. [2023-11-19 07:41:40,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 474 flow [2023-11-19 07:41:40,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 472 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 07:41:40,816 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 296 flow [2023-11-19 07:41:40,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2023-11-19 07:41:40,817 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -29 predicate places. [2023-11-19 07:41:40,817 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 296 flow [2023-11-19 07:41:40,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 265.85714285714283) internal successors, (1861), 7 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:40,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:40,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:40,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:41:40,818 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:40,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1437450654, now seen corresponding path program 2 times [2023-11-19 07:41:40,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:40,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519606768] [2023-11-19 07:41:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:40,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:42,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:42,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519606768] [2023-11-19 07:41:42,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519606768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:42,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878051527] [2023-11-19 07:41:42,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:42,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:42,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:42,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:42,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:41:42,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:42,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:42,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:41:42,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:42,939 INFO L378 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 11 treesize of output 7 [2023-11-19 07:41:42,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:42,993 INFO L378 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 16 treesize of output 11 [2023-11-19 07:41:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:43,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:43,083 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_~#queue~0.offset| 1604))) (and (forall ((v_ArrVal_279 (Array Int Int))) (<= 0 (+ |c_~#queue~0.offset| (* (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_279) |c_~#queue~0.base|) .cse0) 4)))) (forall ((v_ArrVal_279 (Array Int Int))) (<= (+ |c_~#queue~0.offset| (* (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_279) |c_~#queue~0.base|) .cse0) 4) 4) (select |c_#length| |c_~#queue~0.base|))))) is different from false [2023-11-19 07:41:43,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:43,105 INFO L378 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 29 treesize of output 30 [2023-11-19 07:41:43,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:43,116 INFO L378 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 50 treesize of output 49 [2023-11-19 07:41:43,122 INFO L378 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 14 treesize of output 10 [2023-11-19 07:41:43,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:43,153 INFO L378 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 [2023-11-19 07:41:43,156 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:41:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:43,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-19 07:41:43,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:43,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2023-11-19 07:41:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:43,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878051527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:43,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:43,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-19 07:41:43,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658551267] [2023-11-19 07:41:43,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:43,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:41:43,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:43,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:41:43,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=265, Unknown=1, NotChecked=34, Total=380 [2023-11-19 07:41:43,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 691 [2023-11-19 07:41:43,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 296 flow. Second operand has 20 states, 20 states have (on average 185.95) internal successors, (3719), 20 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:43,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:43,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 691 [2023-11-19 07:41:43,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:44,635 INFO L124 PetriNetUnfolderBase]: 612/1225 cut-off events. [2023-11-19 07:41:44,635 INFO L125 PetriNetUnfolderBase]: For 371/371 co-relation queries the response was YES. [2023-11-19 07:41:44,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 1225 events. 612/1225 cut-off events. For 371/371 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6672 event pairs, 169 based on Foata normal form. 8/1113 useless extension candidates. Maximal degree in co-relation 2956. Up to 400 conditions per place. [2023-11-19 07:41:44,643 INFO L140 encePairwiseOnDemand]: 677/691 looper letters, 122 selfloop transitions, 26 changer transitions 0/154 dead transitions. [2023-11-19 07:41:44,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 154 transitions, 837 flow [2023-11-19 07:41:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:41:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:41:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2718 transitions. [2023-11-19 07:41:44,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28095927227620426 [2023-11-19 07:41:44,657 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2718 transitions. [2023-11-19 07:41:44,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2718 transitions. [2023-11-19 07:41:44,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:44,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2718 transitions. [2023-11-19 07:41:44,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 194.14285714285714) internal successors, (2718), 14 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:44,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 691.0) internal successors, (10365), 15 states have internal predecessors, (10365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:44,686 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 691.0) internal successors, (10365), 15 states have internal predecessors, (10365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:44,686 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 296 flow. Second operand 14 states and 2718 transitions. [2023-11-19 07:41:44,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 154 transitions, 837 flow [2023-11-19 07:41:44,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 154 transitions, 812 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:44,692 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 408 flow [2023-11-19 07:41:44,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=408, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2023-11-19 07:41:44,693 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -14 predicate places. [2023-11-19 07:41:44,693 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 408 flow [2023-11-19 07:41:44,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 185.95) internal successors, (3719), 20 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:44,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:44,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:44,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:44,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:41:44,896 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:41:44,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -587706807, now seen corresponding path program 1 times [2023-11-19 07:41:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:44,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995081853] [2023-11-19 07:41:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:45,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:45,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995081853] [2023-11-19 07:41:45,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995081853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:45,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957572447] [2023-11-19 07:41:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:45,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:45,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:45,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:45,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6028bbc1-a38f-4864-a873-b5e631945a9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:41:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:45,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 07:41:45,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:46,090 INFO L349 Elim1Store]: treesize reduction 124, result has 41.5 percent of original size [2023-11-19 07:41:46,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 356 treesize of output 283 [2023-11-19 07:41:46,123 INFO L378 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 11 [2023-11-19 07:41:46,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:46,183 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:41:46,191 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:41:46,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 51 [2023-11-19 07:41:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:46,233 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:41:46,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 46 treesize of output 29 [2023-11-19 07:41:46,304 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:41:46,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 49 treesize of output 27 [2023-11-19 07:41:46,312 INFO L378 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 9 treesize of output 7 [2023-11-19 07:41:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:46,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 31 treesize of output 14 [2023-11-19 07:41:46,339 INFO L378 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 9 treesize of output 7 [2023-11-19 07:41:47,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:47,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 161 treesize of output 139 [2023-11-19 07:41:48,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:48,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 237 treesize of output 201