./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/02_inc_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/02_inc_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme --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 ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:42:02,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:42:02,926 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:42:02,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:42:02,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:42:02,982 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:42:02,984 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:42:02,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:42:02,986 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:42:02,991 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:42:02,991 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:42:02,993 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:42:02,993 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:42:02,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:42:02,996 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:42:02,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:42:02,997 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:42:02,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:42:02,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:42:02,999 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:42:02,999 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:42:03,000 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:42:03,001 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:42:03,001 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:42:03,002 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:42:03,002 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:42:03,003 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:42:03,003 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:42:03,004 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:42:03,004 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:42:03,006 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:42:03,019 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:42:03,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:03,019 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:42:03,020 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:42:03,020 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:42:03,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:42:03,020 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:42:03,021 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:42:03,021 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:42:03,021 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:42:03,022 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_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 [2023-11-26 10:42:03,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:42:03,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:42:03,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:42:03,415 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:42:03,416 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:42:03,417 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread-ext/02_inc_cas.i [2023-11-26 10:42:06,604 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:42:06,889 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:42:06,890 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/sv-benchmarks/c/pthread-ext/02_inc_cas.i [2023-11-26 10:42:06,913 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/data/cce7d44dc/d98c364f902545f98d431a39506fabdf/FLAG0049c5351 [2023-11-26 10:42:06,927 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/data/cce7d44dc/d98c364f902545f98d431a39506fabdf [2023-11-26 10:42:06,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:42:06,931 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:42:06,947 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:06,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:42:06,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:42:06,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:06" (1/1) ... [2023-11-26 10:42:06,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3ebe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:06, skipping insertion in model container [2023-11-26 10:42:06,955 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:06" (1/1) ... [2023-11-26 10:42:06,999 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:42:07,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:07,435 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:42:07,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:07,551 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:42:07,551 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:42:07,560 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:42:07,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07 WrapperNode [2023-11-26 10:42:07,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:07,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:07,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:42:07,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:42:07,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,596 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,625 INFO L138 Inliner]: procedures = 170, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-11-26 10:42:07,625 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:07,626 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:42:07,627 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:42:07,627 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:42:07,640 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,643 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,660 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [2, 5, 3, 1]. 45 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2023-11-26 10:42:07,661 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,661 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,682 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,685 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,689 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,693 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:42:07,694 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:42:07,694 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:42:07,694 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:42:07,695 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (1/1) ... [2023-11-26 10:42:07,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:07,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:07,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:42:07,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcaae22a-d5a4-428d-a3bc-7f46aed5d23b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:42:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:42:07,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:42:07,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:42:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:42:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-26 10:42:07,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-26 10:42:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:42:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:42:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:42:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:42:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:42:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:42:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:42:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:42:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:42:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:42:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:42:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:42:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:42:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:42:07,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:42:07,821 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:42:08,054 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:42:08,056 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:42:08,356 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:42:08,580 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:42:08,588 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:42:08,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:08 BoogieIcfgContainer [2023-11-26 10:42:08,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:42:08,592 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:42:08,592 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:42:08,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:42:08,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:42:06" (1/3) ... [2023-11-26 10:42:08,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208352b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:08, skipping insertion in model container [2023-11-26 10:42:08,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:07" (2/3) ... [2023-11-26 10:42:08,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208352b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:08, skipping insertion in model container [2023-11-26 10:42:08,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:08" (3/3) ... [2023-11-26 10:42:08,598 INFO L112 eAbstractionObserver]: Analyzing ICFG 02_inc_cas.i [2023-11-26 10:42:08,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:42:08,620 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-26 10:42:08,620 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:42:08,715 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 10:42:08,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 38 transitions, 80 flow [2023-11-26 10:42:08,800 INFO L124 PetriNetUnfolderBase]: 3/45 cut-off events. [2023-11-26 10:42:08,800 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:42:08,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 45 events. 3/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 186 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-26 10:42:08,807 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 38 transitions, 80 flow [2023-11-26 10:42:08,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 38 transitions, 80 flow [2023-11-26 10:42:08,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:42:08,841 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;@66c7d577, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:42:08,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-11-26 10:42:08,846 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:42:08,846 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:42:08,846 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:42:08,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:08,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:42:08,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-26 10:42:08,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash 293061, now seen corresponding path program 1 times [2023-11-26 10:42:08,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:08,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32664604] [2023-11-26 10:42:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:08,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:09,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:09,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32664604] [2023-11-26 10:42:09,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32664604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:09,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:09,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811447612] [2023-11-26 10:42:09,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:09,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:09,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:09,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:42:09,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:09,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:42:09,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:09,429 INFO L124 PetriNetUnfolderBase]: 61/164 cut-off events. [2023-11-26 10:42:09,429 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:42:09,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 164 events. 61/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 690 event pairs, 51 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 294. Up to 131 conditions per place. [2023-11-26 10:42:09,437 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 25 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2023-11-26 10:42:09,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 132 flow [2023-11-26 10:42:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2023-11-26 10:42:09,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2023-11-26 10:42:09,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2023-11-26 10:42:09,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2023-11-26 10:42:09,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:09,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2023-11-26 10:42:09,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,473 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 80 flow. Second operand 3 states and 56 transitions. [2023-11-26 10:42:09,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 132 flow [2023-11-26 10:42:09,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:42:09,481 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 90 flow [2023-11-26 10:42:09,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-11-26 10:42:09,489 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-26 10:42:09,489 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 90 flow [2023-11-26 10:42:09,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:09,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:42:09,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:42:09,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-26 10:42:09,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash 293062, now seen corresponding path program 1 times [2023-11-26 10:42:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:09,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463917202] [2023-11-26 10:42:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:09,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:09,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:09,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463917202] [2023-11-26 10:42:09,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463917202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:09,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:09,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:09,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326852859] [2023-11-26 10:42:09,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:09,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:09,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:09,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:42:09,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:09,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:42:09,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:09,793 INFO L124 PetriNetUnfolderBase]: 81/237 cut-off events. [2023-11-26 10:42:09,793 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-26 10:42:09,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 237 events. 81/237 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1231 event pairs, 17 based on Foata normal form. 2/157 useless extension candidates. Maximal degree in co-relation 452. Up to 154 conditions per place. [2023-11-26 10:42:09,797 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 45 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-11-26 10:42:09,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 242 flow [2023-11-26 10:42:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-26 10:42:09,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140350877192983 [2023-11-26 10:42:09,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-26 10:42:09,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-26 10:42:09,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:09,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-26 10:42:09,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,803 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 90 flow. Second operand 3 states and 70 transitions. [2023-11-26 10:42:09,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 242 flow [2023-11-26 10:42:09,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:42:09,807 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 106 flow [2023-11-26 10:42:09,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-26 10:42:09,809 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-11-26 10:42:09,809 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 106 flow [2023-11-26 10:42:09,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:09,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 10:42:09,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:42:09,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-26 10:42:09,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash 140907909, now seen corresponding path program 1 times [2023-11-26 10:42:09,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:09,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479097922] [2023-11-26 10:42:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:10,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:10,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479097922] [2023-11-26 10:42:10,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479097922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:10,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:10,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:10,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641309673] [2023-11-26 10:42:10,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:10,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:10,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:10,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:10,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2023-11-26 10:42:10,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:10,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2023-11-26 10:42:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:10,195 INFO L124 PetriNetUnfolderBase]: 39/131 cut-off events. [2023-11-26 10:42:10,195 INFO L125 PetriNetUnfolderBase]: For 20/23 co-relation queries the response was YES. [2023-11-26 10:42:10,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 131 events. 39/131 cut-off events. For 20/23 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 566 event pairs, 28 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 255. Up to 93 conditions per place. [2023-11-26 10:42:10,198 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 21 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-26 10:42:10,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 33 transitions, 152 flow [2023-11-26 10:42:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:10,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2023-11-26 10:42:10,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-11-26 10:42:10,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 51 transitions. [2023-11-26 10:42:10,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 51 transitions. [2023-11-26 10:42:10,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:10,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 51 transitions. [2023-11-26 10:42:10,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,203 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 106 flow. Second operand 3 states and 51 transitions. [2023-11-26 10:42:10,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 33 transitions, 152 flow [2023-11-26 10:42:10,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:42:10,207 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 98 flow [2023-11-26 10:42:10,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-26 10:42:10,208 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-26 10:42:10,208 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 98 flow [2023-11-26 10:42:10,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:10,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 10:42:10,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:42:10,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-26 10:42:10,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:10,211 INFO L85 PathProgramCache]: Analyzing trace with hash 140907910, now seen corresponding path program 1 times [2023-11-26 10:42:10,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:10,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056681687] [2023-11-26 10:42:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:10,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:10,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:10,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056681687] [2023-11-26 10:42:10,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056681687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:10,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:10,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:10,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003079937] [2023-11-26 10:42:10,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:10,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:42:10,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:42:10,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:42:10,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2023-11-26 10:42:10,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:10,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2023-11-26 10:42:10,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:10,566 INFO L124 PetriNetUnfolderBase]: 33/113 cut-off events. [2023-11-26 10:42:10,566 INFO L125 PetriNetUnfolderBase]: For 21/23 co-relation queries the response was YES. [2023-11-26 10:42:10,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 113 events. 33/113 cut-off events. For 21/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 468 event pairs, 24 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 222. Up to 87 conditions per place. [2023-11-26 10:42:10,568 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 17 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-26 10:42:10,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 128 flow [2023-11-26 10:42:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2023-11-26 10:42:10,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2023-11-26 10:42:10,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 48 transitions. [2023-11-26 10:42:10,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 48 transitions. [2023-11-26 10:42:10,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:10,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 48 transitions. [2023-11-26 10:42:10,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,573 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 98 flow. Second operand 3 states and 48 transitions. [2023-11-26 10:42:10,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 128 flow [2023-11-26 10:42:10,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:42:10,575 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 88 flow [2023-11-26 10:42:10,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-11-26 10:42:10,577 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-26 10:42:10,577 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 88 flow [2023-11-26 10:42:10,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:10,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-26 10:42:10,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:42:10,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-26 10:42:10,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:10,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2027248771, now seen corresponding path program 1 times [2023-11-26 10:42:10,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:10,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362242761] [2023-11-26 10:42:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:10,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:42:10,594 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:42:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:42:10,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:42:10,622 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:42:10,623 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2023-11-26 10:42:10,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 34 remaining) [2023-11-26 10:42:10,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2023-11-26 10:42:10,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2023-11-26 10:42:10,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2023-11-26 10:42:10,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (28 of 34 remaining) [2023-11-26 10:42:10,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2023-11-26 10:42:10,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2023-11-26 10:42:10,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2023-11-26 10:42:10,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 34 remaining) [2023-11-26 10:42:10,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2023-11-26 10:42:10,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2023-11-26 10:42:10,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 34 remaining) [2023-11-26 10:42:10,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 34 remaining) [2023-11-26 10:42:10,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2023-11-26 10:42:10,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 34 remaining) [2023-11-26 10:42:10,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2023-11-26 10:42:10,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2023-11-26 10:42:10,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (15 of 34 remaining) [2023-11-26 10:42:10,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2023-11-26 10:42:10,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2023-11-26 10:42:10,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2023-11-26 10:42:10,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2023-11-26 10:42:10,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (10 of 34 remaining) [2023-11-26 10:42:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2023-11-26 10:42:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2023-11-26 10:42:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2023-11-26 10:42:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 34 remaining) [2023-11-26 10:42:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2023-11-26 10:42:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2023-11-26 10:42:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 34 remaining) [2023-11-26 10:42:10,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 34 remaining) [2023-11-26 10:42:10,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 34 remaining) [2023-11-26 10:42:10,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 34 remaining) [2023-11-26 10:42:10,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:42:10,635 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-26 10:42:10,638 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:42:10,638 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-26 10:42:10,703 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 10:42:10,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 142 flow [2023-11-26 10:42:10,718 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2023-11-26 10:42:10,718 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:42:10,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 81 events. 6/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 351 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 62. Up to 3 conditions per place. [2023-11-26 10:42:10,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 142 flow [2023-11-26 10:42:10,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 66 transitions, 142 flow [2023-11-26 10:42:10,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:42:10,724 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;@66c7d577, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:42:10,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-11-26 10:42:10,726 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:42:10,726 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:42:10,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:42:10,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:10,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:42:10,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:10,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash 358599, now seen corresponding path program 1 times [2023-11-26 10:42:10,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:10,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481838780] [2023-11-26 10:42:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:10,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:10,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481838780] [2023-11-26 10:42:10,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481838780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:10,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:10,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:10,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566847536] [2023-11-26 10:42:10,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:10,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:10,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:10,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:10,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:10,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 66 [2023-11-26 10:42:10,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:10,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 66 [2023-11-26 10:42:10,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:11,777 INFO L124 PetriNetUnfolderBase]: 2863/4953 cut-off events. [2023-11-26 10:42:11,777 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-26 10:42:11,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9535 conditions, 4953 events. 2863/4953 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31913 event pairs, 2280 based on Foata normal form. 0/2624 useless extension candidates. Maximal degree in co-relation 5993. Up to 3895 conditions per place. [2023-11-26 10:42:11,826 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 85 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2023-11-26 10:42:11,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 101 transitions, 399 flow [2023-11-26 10:42:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:11,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-26 10:42:11,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.702020202020202 [2023-11-26 10:42:11,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-26 10:42:11,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-26 10:42:11,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:11,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-26 10:42:11,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:11,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:11,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:11,832 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 142 flow. Second operand 3 states and 139 transitions. [2023-11-26 10:42:11,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 101 transitions, 399 flow [2023-11-26 10:42:11,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 399 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:42:11,836 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 170 flow [2023-11-26 10:42:11,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-11-26 10:42:11,838 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-26 10:42:11,838 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 170 flow [2023-11-26 10:42:11,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:11,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:11,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:42:11,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:42:11,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:11,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash 358600, now seen corresponding path program 1 times [2023-11-26 10:42:11,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:11,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035393479] [2023-11-26 10:42:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:11,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:11,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035393479] [2023-11-26 10:42:11,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035393479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:11,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:11,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:11,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674806211] [2023-11-26 10:42:11,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:11,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:11,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:11,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:11,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 66 [2023-11-26 10:42:11,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:11,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:11,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 66 [2023-11-26 10:42:11,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:13,265 INFO L124 PetriNetUnfolderBase]: 4155/7467 cut-off events. [2023-11-26 10:42:13,265 INFO L125 PetriNetUnfolderBase]: For 1687/1707 co-relation queries the response was YES. [2023-11-26 10:42:13,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15656 conditions, 7467 events. 4155/7467 cut-off events. For 1687/1707 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 55048 event pairs, 1938 based on Foata normal form. 22/4324 useless extension candidates. Maximal degree in co-relation 13922. Up to 5314 conditions per place. [2023-11-26 10:42:13,343 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 96 selfloop transitions, 5 changer transitions 0/111 dead transitions. [2023-11-26 10:42:13,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 505 flow [2023-11-26 10:42:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-26 10:42:13,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2023-11-26 10:42:13,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-26 10:42:13,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-26 10:42:13,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:13,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-26 10:42:13,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:13,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:13,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:13,349 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 170 flow. Second operand 3 states and 125 transitions. [2023-11-26 10:42:13,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 505 flow [2023-11-26 10:42:13,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 483 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:42:13,439 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 200 flow [2023-11-26 10:42:13,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-11-26 10:42:13,440 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-11-26 10:42:13,440 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 200 flow [2023-11-26 10:42:13,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:13,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:13,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 10:42:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:42:13,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:13,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2093442816, now seen corresponding path program 1 times [2023-11-26 10:42:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:13,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296220008] [2023-11-26 10:42:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:13,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:13,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:13,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296220008] [2023-11-26 10:42:13,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296220008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:13,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:13,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232539864] [2023-11-26 10:42:13,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:13,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:13,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:13,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:13,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 66 [2023-11-26 10:42:13,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:13,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:13,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 66 [2023-11-26 10:42:13,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:14,673 INFO L124 PetriNetUnfolderBase]: 2310/4436 cut-off events. [2023-11-26 10:42:14,673 INFO L125 PetriNetUnfolderBase]: For 872/876 co-relation queries the response was YES. [2023-11-26 10:42:14,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9363 conditions, 4436 events. 2310/4436 cut-off events. For 872/876 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32460 event pairs, 1492 based on Foata normal form. 0/2546 useless extension candidates. Maximal degree in co-relation 6028. Up to 2932 conditions per place. [2023-11-26 10:42:14,724 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 86 selfloop transitions, 5 changer transitions 0/105 dead transitions. [2023-11-26 10:42:14,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 485 flow [2023-11-26 10:42:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-26 10:42:14,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2023-11-26 10:42:14,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-26 10:42:14,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-26 10:42:14,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:14,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-26 10:42:14,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:14,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:14,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:14,732 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 200 flow. Second operand 3 states and 125 transitions. [2023-11-26 10:42:14,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 485 flow [2023-11-26 10:42:14,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 105 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:42:14,740 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 241 flow [2023-11-26 10:42:14,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2023-11-26 10:42:14,742 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-11-26 10:42:14,743 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 241 flow [2023-11-26 10:42:14,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:14,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:14,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 10:42:14,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:42:14,744 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:14,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:14,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2093442817, now seen corresponding path program 1 times [2023-11-26 10:42:14,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:14,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800135592] [2023-11-26 10:42:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:14,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:14,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:14,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800135592] [2023-11-26 10:42:14,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800135592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:14,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:14,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589874778] [2023-11-26 10:42:14,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:14,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:42:14,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:42:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:42:14,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-26 10:42:14,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:14,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:14,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-26 10:42:14,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:15,553 INFO L124 PetriNetUnfolderBase]: 1582/3026 cut-off events. [2023-11-26 10:42:15,553 INFO L125 PetriNetUnfolderBase]: For 900/904 co-relation queries the response was YES. [2023-11-26 10:42:15,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7033 conditions, 3026 events. 1582/3026 cut-off events. For 900/904 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 20424 event pairs, 1133 based on Foata normal form. 0/1940 useless extension candidates. Maximal degree in co-relation 4379. Up to 2611 conditions per place. [2023-11-26 10:42:15,588 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 48 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-11-26 10:42:15,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 327 flow [2023-11-26 10:42:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-26 10:42:15,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-11-26 10:42:15,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-26 10:42:15,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-26 10:42:15,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:15,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-26 10:42:15,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:15,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:15,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:15,594 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 241 flow. Second operand 3 states and 84 transitions. [2023-11-26 10:42:15,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 327 flow [2023-11-26 10:42:15,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:42:15,602 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 226 flow [2023-11-26 10:42:15,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2023-11-26 10:42:15,606 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-11-26 10:42:15,607 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 226 flow [2023-11-26 10:42:15,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:15,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:15,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:15,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:42:15,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:15,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1752229410, now seen corresponding path program 1 times [2023-11-26 10:42:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:15,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280708688] [2023-11-26 10:42:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:42:15,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:15,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280708688] [2023-11-26 10:42:15,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280708688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:15,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:15,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:15,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284188560] [2023-11-26 10:42:15,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:15,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:15,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:15,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:15,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 66 [2023-11-26 10:42:15,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:15,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:15,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 66 [2023-11-26 10:42:15,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:16,584 INFO L124 PetriNetUnfolderBase]: 1900/3634 cut-off events. [2023-11-26 10:42:16,585 INFO L125 PetriNetUnfolderBase]: For 1637/1637 co-relation queries the response was YES. [2023-11-26 10:42:16,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8353 conditions, 3634 events. 1900/3634 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 25322 event pairs, 1133 based on Foata normal form. 200/2698 useless extension candidates. Maximal degree in co-relation 8339. Up to 2302 conditions per place. [2023-11-26 10:42:16,622 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 110 selfloop transitions, 16 changer transitions 0/135 dead transitions. [2023-11-26 10:42:16,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 135 transitions, 671 flow [2023-11-26 10:42:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:42:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:42:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2023-11-26 10:42:16,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2023-11-26 10:42:16,625 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 158 transitions. [2023-11-26 10:42:16,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 158 transitions. [2023-11-26 10:42:16,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:16,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 158 transitions. [2023-11-26 10:42:16,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:16,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:16,629 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:16,629 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 226 flow. Second operand 4 states and 158 transitions. [2023-11-26 10:42:16,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 135 transitions, 671 flow [2023-11-26 10:42:16,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 135 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:42:16,639 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 317 flow [2023-11-26 10:42:16,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-11-26 10:42:16,641 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-11-26 10:42:16,642 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 317 flow [2023-11-26 10:42:16,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:16,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:16,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:16,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:42:16,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:16,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:16,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1753865385, now seen corresponding path program 1 times [2023-11-26 10:42:16,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:16,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128662588] [2023-11-26 10:42:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:16,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:16,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:16,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128662588] [2023-11-26 10:42:16,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128662588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:16,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:16,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:16,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735238141] [2023-11-26 10:42:16,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:16,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:16,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:16,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 66 [2023-11-26 10:42:16,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:16,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:16,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 66 [2023-11-26 10:42:16,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:17,406 INFO L124 PetriNetUnfolderBase]: 1419/2762 cut-off events. [2023-11-26 10:42:17,407 INFO L125 PetriNetUnfolderBase]: For 2683/2697 co-relation queries the response was YES. [2023-11-26 10:42:17,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6983 conditions, 2762 events. 1419/2762 cut-off events. For 2683/2697 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 18469 event pairs, 575 based on Foata normal form. 0/1948 useless extension candidates. Maximal degree in co-relation 6966. Up to 1640 conditions per place. [2023-11-26 10:42:17,442 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 75 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2023-11-26 10:42:17,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 614 flow [2023-11-26 10:42:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-11-26 10:42:17,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505050505050505 [2023-11-26 10:42:17,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-11-26 10:42:17,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-11-26 10:42:17,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:17,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-11-26 10:42:17,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:17,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:17,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:17,449 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 317 flow. Second operand 3 states and 109 transitions. [2023-11-26 10:42:17,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 614 flow [2023-11-26 10:42:17,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:42:17,457 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 431 flow [2023-11-26 10:42:17,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=431, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2023-11-26 10:42:17,459 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-11-26 10:42:17,460 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 431 flow [2023-11-26 10:42:17,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:17,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:17,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:17,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:42:17,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:17,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:17,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1753865388, now seen corresponding path program 1 times [2023-11-26 10:42:17,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:17,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001303191] [2023-11-26 10:42:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:17,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:17,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001303191] [2023-11-26 10:42:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001303191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:17,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:17,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:17,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4752028] [2023-11-26 10:42:17,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:17,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:17,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:17,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:17,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:17,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 66 [2023-11-26 10:42:17,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 431 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:17,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:17,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 66 [2023-11-26 10:42:17,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:18,172 INFO L124 PetriNetUnfolderBase]: 1132/2238 cut-off events. [2023-11-26 10:42:18,173 INFO L125 PetriNetUnfolderBase]: For 3974/3988 co-relation queries the response was YES. [2023-11-26 10:42:18,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6550 conditions, 2238 events. 1132/2238 cut-off events. For 3974/3988 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14690 event pairs, 427 based on Foata normal form. 140/1809 useless extension candidates. Maximal degree in co-relation 6532. Up to 1340 conditions per place. [2023-11-26 10:42:18,201 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 59 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2023-11-26 10:42:18,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 610 flow [2023-11-26 10:42:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-26 10:42:18,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2023-11-26 10:42:18,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-26 10:42:18,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-26 10:42:18,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:18,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-26 10:42:18,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:18,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:18,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:18,207 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 431 flow. Second operand 3 states and 93 transitions. [2023-11-26 10:42:18,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 610 flow [2023-11-26 10:42:18,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 582 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:42:18,217 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 425 flow [2023-11-26 10:42:18,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=425, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2023-11-26 10:42:18,219 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-11-26 10:42:18,219 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 425 flow [2023-11-26 10:42:18,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:18,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:18,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:42:18,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:18,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash 265354331, now seen corresponding path program 1 times [2023-11-26 10:42:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:18,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19472121] [2023-11-26 10:42:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:18,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:42:18,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:18,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19472121] [2023-11-26 10:42:18,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19472121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:18,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:18,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:18,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230159614] [2023-11-26 10:42:18,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:18,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:18,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:18,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-26 10:42:18,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 425 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:18,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:18,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-26 10:42:18,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:19,293 INFO L124 PetriNetUnfolderBase]: 2265/4564 cut-off events. [2023-11-26 10:42:19,293 INFO L125 PetriNetUnfolderBase]: For 6925/6951 co-relation queries the response was YES. [2023-11-26 10:42:19,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12556 conditions, 4564 events. 2265/4564 cut-off events. For 6925/6951 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34969 event pairs, 344 based on Foata normal form. 104/3548 useless extension candidates. Maximal degree in co-relation 12538. Up to 2002 conditions per place. [2023-11-26 10:42:19,331 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 129 selfloop transitions, 12 changer transitions 0/157 dead transitions. [2023-11-26 10:42:19,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 157 transitions, 1094 flow [2023-11-26 10:42:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:42:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:42:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2023-11-26 10:42:19,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121212121212121 [2023-11-26 10:42:19,333 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 169 transitions. [2023-11-26 10:42:19,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 169 transitions. [2023-11-26 10:42:19,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:19,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 169 transitions. [2023-11-26 10:42:19,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:19,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:19,336 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:19,336 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 425 flow. Second operand 5 states and 169 transitions. [2023-11-26 10:42:19,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 157 transitions, 1094 flow [2023-11-26 10:42:19,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 157 transitions, 1048 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:42:19,363 INFO L231 Difference]: Finished difference. Result has 69 places, 85 transitions, 506 flow [2023-11-26 10:42:19,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=506, PETRI_PLACES=69, PETRI_TRANSITIONS=85} [2023-11-26 10:42:19,364 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-11-26 10:42:19,365 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 85 transitions, 506 flow [2023-11-26 10:42:19,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:19,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:19,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:19,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:42:19,365 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err14ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:19,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:19,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1127027263, now seen corresponding path program 1 times [2023-11-26 10:42:19,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:19,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727947102] [2023-11-26 10:42:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:19,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:19,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:19,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727947102] [2023-11-26 10:42:19,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727947102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:19,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:19,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:19,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108178021] [2023-11-26 10:42:19,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:19,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:42:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:42:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:19,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 66 [2023-11-26 10:42:19,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 85 transitions, 506 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:19,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:19,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 66 [2023-11-26 10:42:19,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:21,457 INFO L124 PetriNetUnfolderBase]: 3744/7506 cut-off events. [2023-11-26 10:42:21,457 INFO L125 PetriNetUnfolderBase]: For 7933/7960 co-relation queries the response was YES. [2023-11-26 10:42:21,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21709 conditions, 7506 events. 3744/7506 cut-off events. For 7933/7960 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 59591 event pairs, 517 based on Foata normal form. 6/5917 useless extension candidates. Maximal degree in co-relation 21687. Up to 2941 conditions per place. [2023-11-26 10:42:21,538 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 154 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2023-11-26 10:42:21,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 192 transitions, 1370 flow [2023-11-26 10:42:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:42:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:42:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2023-11-26 10:42:21,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2023-11-26 10:42:21,541 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 195 transitions. [2023-11-26 10:42:21,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 195 transitions. [2023-11-26 10:42:21,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:21,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 195 transitions. [2023-11-26 10:42:21,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:21,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:21,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:21,547 INFO L175 Difference]: Start difference. First operand has 69 places, 85 transitions, 506 flow. Second operand 6 states and 195 transitions. [2023-11-26 10:42:21,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 192 transitions, 1370 flow [2023-11-26 10:42:21,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 192 transitions, 1370 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:42:21,563 INFO L231 Difference]: Finished difference. Result has 77 places, 104 transitions, 700 flow [2023-11-26 10:42:21,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=700, PETRI_PLACES=77, PETRI_TRANSITIONS=104} [2023-11-26 10:42:21,565 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-11-26 10:42:21,565 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 104 transitions, 700 flow [2023-11-26 10:42:21,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:21,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:21,567 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-26 10:42:21,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:42:21,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-26 10:42:21,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash -94082710, now seen corresponding path program 1 times [2023-11-26 10:42:21,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:21,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448676971] [2023-11-26 10:42:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:21,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:42:21,585 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:42:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:42:21,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:42:21,603 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:42:21,603 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2023-11-26 10:42:21,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-11-26 10:42:21,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-11-26 10:42:21,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-11-26 10:42:21,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2023-11-26 10:42:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (43 of 49 remaining) [2023-11-26 10:42:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-11-26 10:42:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-11-26 10:42:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-11-26 10:42:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 49 remaining) [2023-11-26 10:42:21,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-11-26 10:42:21,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-11-26 10:42:21,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 49 remaining) [2023-11-26 10:42:21,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 49 remaining) [2023-11-26 10:42:21,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-11-26 10:42:21,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2023-11-26 10:42:21,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-11-26 10:42:21,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-11-26 10:42:21,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (30 of 49 remaining) [2023-11-26 10:42:21,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-11-26 10:42:21,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-11-26 10:42:21,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-11-26 10:42:21,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-11-26 10:42:21,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (25 of 49 remaining) [2023-11-26 10:42:21,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-11-26 10:42:21,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-11-26 10:42:21,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-11-26 10:42:21,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 49 remaining) [2023-11-26 10:42:21,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-11-26 10:42:21,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-11-26 10:42:21,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 49 remaining) [2023-11-26 10:42:21,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 49 remaining) [2023-11-26 10:42:21,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-11-26 10:42:21,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-11-26 10:42:21,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2023-11-26 10:42:21,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-11-26 10:42:21,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-11-26 10:42:21,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-11-26 10:42:21,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (10 of 49 remaining) [2023-11-26 10:42:21,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-11-26 10:42:21,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-11-26 10:42:21,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-11-26 10:42:21,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 49 remaining) [2023-11-26 10:42:21,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-11-26 10:42:21,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-11-26 10:42:21,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 49 remaining) [2023-11-26 10:42:21,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 49 remaining) [2023-11-26 10:42:21,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-11-26 10:42:21,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 49 remaining) [2023-11-26 10:42:21,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:42:21,615 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:21,616 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:42:21,617 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-26 10:42:21,721 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 10:42:21,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 94 transitions, 206 flow [2023-11-26 10:42:21,762 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-11-26 10:42:21,763 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-26 10:42:21,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 9/117 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 517 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-11-26 10:42:21,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 94 transitions, 206 flow [2023-11-26 10:42:21,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 94 transitions, 206 flow [2023-11-26 10:42:21,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:42:21,769 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;@66c7d577, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:42:21,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-26 10:42:21,770 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:42:21,771 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:42:21,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:42:21,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:21,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:42:21,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-26 10:42:21,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash 451941, now seen corresponding path program 1 times [2023-11-26 10:42:21,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:21,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134352169] [2023-11-26 10:42:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:21,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:21,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:21,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134352169] [2023-11-26 10:42:21,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134352169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:21,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:21,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686187863] [2023-11-26 10:42:21,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:21,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 94 [2023-11-26 10:42:21,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:21,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:21,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 94 [2023-11-26 10:42:21,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:38,775 INFO L124 PetriNetUnfolderBase]: 90835/133665 cut-off events. [2023-11-26 10:42:38,775 INFO L125 PetriNetUnfolderBase]: For 3630/3630 co-relation queries the response was YES. [2023-11-26 10:42:38,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259300 conditions, 133665 events. 90835/133665 cut-off events. For 3630/3630 co-relation queries the response was YES. Maximal size of possible extension queue 5236. Compared 1050358 event pairs, 68575 based on Foata normal form. 0/65140 useless extension candidates. Maximal degree in co-relation 20189. Up to 100701 conditions per place. [2023-11-26 10:42:39,791 INFO L140 encePairwiseOnDemand]: 75/94 looper letters, 125 selfloop transitions, 8 changer transitions 0/147 dead transitions. [2023-11-26 10:42:39,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 147 transitions, 590 flow [2023-11-26 10:42:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-11-26 10:42:39,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7056737588652482 [2023-11-26 10:42:39,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-11-26 10:42:39,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-11-26 10:42:39,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:39,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-11-26 10:42:39,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:39,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:39,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:39,800 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 206 flow. Second operand 3 states and 199 transitions. [2023-11-26 10:42:39,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 147 transitions, 590 flow [2023-11-26 10:42:39,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 147 transitions, 586 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-26 10:42:39,806 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 242 flow [2023-11-26 10:42:39,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2023-11-26 10:42:39,808 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2023-11-26 10:42:39,808 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 242 flow [2023-11-26 10:42:39,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:39,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:39,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:42:39,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:42:39,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-26 10:42:39,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash 451942, now seen corresponding path program 1 times [2023-11-26 10:42:39,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:39,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474264862] [2023-11-26 10:42:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:39,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:39,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:39,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474264862] [2023-11-26 10:42:39,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474264862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:39,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:39,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721105121] [2023-11-26 10:42:39,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:39,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:39,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 94 [2023-11-26 10:42:39,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:39,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:39,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 94 [2023-11-26 10:42:39,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:51,033 INFO L124 PetriNetUnfolderBase]: 67939/99153 cut-off events. [2023-11-26 10:42:51,033 INFO L125 PetriNetUnfolderBase]: For 20863/20863 co-relation queries the response was YES. [2023-11-26 10:42:51,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212806 conditions, 99153 events. 67939/99153 cut-off events. For 20863/20863 co-relation queries the response was YES. Maximal size of possible extension queue 4059. Compared 739979 event pairs, 58706 based on Foata normal form. 7924/57670 useless extension candidates. Maximal degree in co-relation 201731. Up to 92771 conditions per place. [2023-11-26 10:42:51,705 INFO L140 encePairwiseOnDemand]: 92/94 looper letters, 71 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-11-26 10:42:51,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 384 flow [2023-11-26 10:42:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-26 10:42:51,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078014184397163 [2023-11-26 10:42:51,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-26 10:42:51,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-26 10:42:51,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:51,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-26 10:42:51,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:51,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:51,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:51,710 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 242 flow. Second operand 3 states and 115 transitions. [2023-11-26 10:42:51,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 384 flow [2023-11-26 10:42:51,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:42:51,770 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 226 flow [2023-11-26 10:42:51,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2023-11-26 10:42:51,771 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -6 predicate places. [2023-11-26 10:42:51,771 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 226 flow [2023-11-26 10:42:51,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:51,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:51,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 10:42:51,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:42:51,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-26 10:42:51,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash 579346331, now seen corresponding path program 1 times [2023-11-26 10:42:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:51,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101351100] [2023-11-26 10:42:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:51,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:51,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:51,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101351100] [2023-11-26 10:42:51,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101351100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:51,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:51,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:51,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324089694] [2023-11-26 10:42:51,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:51,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:51,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:51,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 94 [2023-11-26 10:42:51,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:51,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:51,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 94 [2023-11-26 10:42:51,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand