./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:32:28,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:32:28,157 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:32:28,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:32:28,168 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:32:28,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:32:28,209 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:32:28,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:32:28,210 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:32:28,216 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:32:28,217 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:32:28,217 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:32:28,218 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:32:28,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:32:28,220 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:32:28,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:32:28,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:32:28,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:32:28,222 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:32:28,223 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:32:28,223 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:32:28,224 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:32:28,224 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:32:28,225 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:32:28,225 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:32:28,226 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:32:28,227 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:32:28,227 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:32:28,228 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:32:28,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:32:28,230 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:32:28,230 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:32:28,230 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:32:28,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:32:28,231 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:32:28,231 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:32:28,239 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:32:28,239 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:32:28,239 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_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 [2023-11-06 22:32:28,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:32:28,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:32:28,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:32:28,554 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:32:28,555 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:32:28,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-06 22:32:31,659 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:32:31,967 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:32:31,968 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-06 22:32:31,986 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/data/3c984a8b1/844a9bb6b2a9445780379aedb6c64627/FLAG90bad3b62 [2023-11-06 22:32:32,006 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/data/3c984a8b1/844a9bb6b2a9445780379aedb6c64627 [2023-11-06 22:32:32,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:32:32,018 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:32:32,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:32,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:32:32,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:32:32,030 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3944a1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32, skipping insertion in model container [2023-11-06 22:32:32,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,103 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:32:32,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:32,562 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:32:32,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:32,644 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:32:32,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32 WrapperNode [2023-11-06 22:32:32,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:32,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:32:32,647 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:32:32,647 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:32:32,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,669 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,694 INFO L138 Inliner]: procedures = 171, calls = 27, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 87 [2023-11-06 22:32:32,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:32:32,695 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:32:32,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:32:32,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:32:32,705 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,708 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,715 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,719 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,721 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,723 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,726 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:32:32,727 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:32:32,728 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:32:32,728 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:32:32,729 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (1/1) ... [2023-11-06 22:32:32,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:32:32,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:32,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:32:32,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0005d67c-6440-45d3-863e-3627ed4e2925/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:32:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:32:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 22:32:32,808 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 22:32:32,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:32:32,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:32:32,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:32:32,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:32:32,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:32:32,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:32:32,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:32:32,811 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:32:32,950 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:32:32,951 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:32:33,190 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:32:33,339 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:32:33,340 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:32:33,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:33 BoogieIcfgContainer [2023-11-06 22:32:33,343 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:32:33,345 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:32:33,345 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:32:33,349 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:32:33,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:32:32" (1/3) ... [2023-11-06 22:32:33,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d08124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:33, skipping insertion in model container [2023-11-06 22:32:33,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32" (2/3) ... [2023-11-06 22:32:33,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d08124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:33, skipping insertion in model container [2023-11-06 22:32:33,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:33" (3/3) ... [2023-11-06 22:32:33,352 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-11-06 22:32:33,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:32:33,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-06 22:32:33,371 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:32:33,465 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:32:33,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 208 flow [2023-11-06 22:32:33,620 INFO L124 PetriNetUnfolderBase]: 8/118 cut-off events. [2023-11-06 22:32:33,622 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:32:33,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 118 events. 8/118 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-06 22:32:33,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 102 transitions, 208 flow [2023-11-06 22:32:33,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 102 transitions, 208 flow [2023-11-06 22:32:33,645 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:32:33,664 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 102 transitions, 208 flow [2023-11-06 22:32:33,669 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 102 transitions, 208 flow [2023-11-06 22:32:33,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 208 flow [2023-11-06 22:32:33,752 INFO L124 PetriNetUnfolderBase]: 8/118 cut-off events. [2023-11-06 22:32:33,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:32:33,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 118 events. 8/118 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-06 22:32:33,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 2584 [2023-11-06 22:32:37,173 INFO L134 LiptonReduction]: Checked pairs total: 6678 [2023-11-06 22:32:37,174 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-11-06 22:32:37,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:32:37,212 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;@7cdb071e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:32:37,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-11-06 22:32:37,218 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:32:37,218 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:32:37,218 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:32:37,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:37,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:32:37,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-06 22:32:37,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash 16538, now seen corresponding path program 1 times [2023-11-06 22:32:37,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:37,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389410595] [2023-11-06 22:32:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:37,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:37,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389410595] [2023-11-06 22:32:37,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389410595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:37,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:37,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:32:37,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61949207] [2023-11-06 22:32:37,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:37,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:37,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:37,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 208 [2023-11-06 22:32:37,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:37,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:37,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 208 [2023-11-06 22:32:37,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:37,768 INFO L124 PetriNetUnfolderBase]: 64/154 cut-off events. [2023-11-06 22:32:37,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:32:37,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 154 events. 64/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 56 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 287. Up to 146 conditions per place. [2023-11-06 22:32:37,772 INFO L140 encePairwiseOnDemand]: 199/208 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-06 22:32:37,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 112 flow [2023-11-06 22:32:37,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:32:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2023-11-06 22:32:37,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2023-11-06 22:32:37,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2023-11-06 22:32:37,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2023-11-06 22:32:37,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:37,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2023-11-06 22:32:37,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:37,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:37,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:37,810 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 86 flow. Second operand 3 states and 276 transitions. [2023-11-06 22:32:37,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 112 flow [2023-11-06 22:32:37,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:32:37,816 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-06 22:32:37,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-06 22:32:37,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -9 predicate places. [2023-11-06 22:32:37,823 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-06 22:32:37,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:37,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:37,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:32:37,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:32:37,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-06 22:32:37,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:37,826 INFO L85 PathProgramCache]: Analyzing trace with hash 16539, now seen corresponding path program 1 times [2023-11-06 22:32:37,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:37,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620331084] [2023-11-06 22:32:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:37,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:37,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:37,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620331084] [2023-11-06 22:32:37,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620331084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:37,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:37,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:32:37,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933133436] [2023-11-06 22:32:37,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:37,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:37,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:37,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:38,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 208 [2023-11-06 22:32:38,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:38,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:38,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 208 [2023-11-06 22:32:38,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:38,185 INFO L124 PetriNetUnfolderBase]: 99/250 cut-off events. [2023-11-06 22:32:38,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:32:38,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 250 events. 99/250 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 993 event pairs, 50 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 481. Up to 125 conditions per place. [2023-11-06 22:32:38,198 INFO L140 encePairwiseOnDemand]: 203/208 looper letters, 43 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-06 22:32:38,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 51 transitions, 202 flow [2023-11-06 22:32:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:32:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-11-06 22:32:38,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2023-11-06 22:32:38,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-11-06 22:32:38,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-11-06 22:32:38,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:38,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-11-06 22:32:38,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:38,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:38,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:38,221 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 282 transitions. [2023-11-06 22:32:38,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 51 transitions, 202 flow [2023-11-06 22:32:38,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:32:38,224 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 93 flow [2023-11-06 22:32:38,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-06 22:32:38,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-11-06 22:32:38,227 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 93 flow [2023-11-06 22:32:38,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:38,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:38,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:32:38,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:32:38,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-06 22:32:38,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1895771681, now seen corresponding path program 1 times [2023-11-06 22:32:38,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:38,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319846432] [2023-11-06 22:32:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:38,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:32:38,278 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:32:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:32:38,342 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:32:38,343 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:32:38,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2023-11-06 22:32:38,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 34 remaining) [2023-11-06 22:32:38,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2023-11-06 22:32:38,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2023-11-06 22:32:38,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2023-11-06 22:32:38,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 34 remaining) [2023-11-06 22:32:38,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2023-11-06 22:32:38,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2023-11-06 22:32:38,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2023-11-06 22:32:38,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (24 of 34 remaining) [2023-11-06 22:32:38,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2023-11-06 22:32:38,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2023-11-06 22:32:38,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (21 of 34 remaining) [2023-11-06 22:32:38,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 34 remaining) [2023-11-06 22:32:38,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2023-11-06 22:32:38,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (18 of 34 remaining) [2023-11-06 22:32:38,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2023-11-06 22:32:38,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2023-11-06 22:32:38,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (15 of 34 remaining) [2023-11-06 22:32:38,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2023-11-06 22:32:38,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2023-11-06 22:32:38,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2023-11-06 22:32:38,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2023-11-06 22:32:38,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 34 remaining) [2023-11-06 22:32:38,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2023-11-06 22:32:38,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2023-11-06 22:32:38,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2023-11-06 22:32:38,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 34 remaining) [2023-11-06 22:32:38,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2023-11-06 22:32:38,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2023-11-06 22:32:38,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 34 remaining) [2023-11-06 22:32:38,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 34 remaining) [2023-11-06 22:32:38,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 34 remaining) [2023-11-06 22:32:38,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (0 of 34 remaining) [2023-11-06 22:32:38,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:32:38,378 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:32:38,382 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:32:38,382 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:32:38,444 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:32:38,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 171 transitions, 352 flow [2023-11-06 22:32:38,487 INFO L124 PetriNetUnfolderBase]: 15/205 cut-off events. [2023-11-06 22:32:38,488 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:32:38,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 205 events. 15/205 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 655 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 154. Up to 6 conditions per place. [2023-11-06 22:32:38,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 171 transitions, 352 flow [2023-11-06 22:32:38,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 171 transitions, 352 flow [2023-11-06 22:32:38,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:32:38,497 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 171 transitions, 352 flow [2023-11-06 22:32:38,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 171 transitions, 352 flow [2023-11-06 22:32:38,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 171 transitions, 352 flow [2023-11-06 22:32:38,533 INFO L124 PetriNetUnfolderBase]: 15/205 cut-off events. [2023-11-06 22:32:38,534 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:32:38,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 205 events. 15/205 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 655 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 154. Up to 6 conditions per place. [2023-11-06 22:32:38,549 INFO L119 LiptonReduction]: Number of co-enabled transitions 14552 [2023-11-06 22:32:41,659 INFO L134 LiptonReduction]: Checked pairs total: 49606 [2023-11-06 22:32:41,659 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-11-06 22:32:41,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:32:41,663 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;@7cdb071e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:32:41,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-11-06 22:32:41,666 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:32:41,666 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-06 22:32:41,666 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:32:41,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:41,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:32:41,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-06 22:32:41,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash 28513, now seen corresponding path program 1 times [2023-11-06 22:32:41,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:41,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542740070] [2023-11-06 22:32:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:41,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:41,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:41,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542740070] [2023-11-06 22:32:41,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542740070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:41,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:41,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:32:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214278776] [2023-11-06 22:32:41,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:41,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:41,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:41,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 305 [2023-11-06 22:32:41,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:41,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:41,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 305 [2023-11-06 22:32:41,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:42,779 INFO L124 PetriNetUnfolderBase]: 2758/5112 cut-off events. [2023-11-06 22:32:42,780 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-06 22:32:42,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9599 conditions, 5112 events. 2758/5112 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 40535 event pairs, 2548 based on Foata normal form. 72/2889 useless extension candidates. Maximal degree in co-relation 6931. Up to 4409 conditions per place. [2023-11-06 22:32:42,844 INFO L140 encePairwiseOnDemand]: 297/305 looper letters, 49 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-11-06 22:32:42,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 73 transitions, 256 flow [2023-11-06 22:32:42,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:32:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-11-06 22:32:42,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081967213114754 [2023-11-06 22:32:42,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-11-06 22:32:42,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-11-06 22:32:42,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:42,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-11-06 22:32:42,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:42,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:42,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:42,860 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 180 flow. Second operand 3 states and 465 transitions. [2023-11-06 22:32:42,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 73 transitions, 256 flow [2023-11-06 22:32:42,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 256 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:32:42,866 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 158 flow [2023-11-06 22:32:42,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2023-11-06 22:32:42,870 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2023-11-06 22:32:42,870 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 158 flow [2023-11-06 22:32:42,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:42,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:42,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:32:42,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:32:42,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-06 22:32:42,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:42,877 INFO L85 PathProgramCache]: Analyzing trace with hash 28511, now seen corresponding path program 1 times [2023-11-06 22:32:42,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:42,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571537500] [2023-11-06 22:32:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:42,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571537500] [2023-11-06 22:32:42,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571537500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:42,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:42,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:32:42,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758130469] [2023-11-06 22:32:42,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:42,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:42,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:42,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:42,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:43,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 305 [2023-11-06 22:32:43,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:43,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:43,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 305 [2023-11-06 22:32:43,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:44,399 INFO L124 PetriNetUnfolderBase]: 4302/8081 cut-off events. [2023-11-06 22:32:44,400 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2023-11-06 22:32:44,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15213 conditions, 8081 events. 4302/8081 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 65794 event pairs, 1856 based on Foata normal form. 0/4809 useless extension candidates. Maximal degree in co-relation 15205. Up to 4008 conditions per place. [2023-11-06 22:32:44,497 INFO L140 encePairwiseOnDemand]: 299/305 looper letters, 92 selfloop transitions, 5 changer transitions 0/120 dead transitions. [2023-11-06 22:32:44,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 451 flow [2023-11-06 22:32:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:32:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-11-06 22:32:44,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398907103825137 [2023-11-06 22:32:44,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-11-06 22:32:44,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-11-06 22:32:44,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:44,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-11-06 22:32:44,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:44,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:44,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:44,510 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 158 flow. Second operand 3 states and 494 transitions. [2023-11-06 22:32:44,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 451 flow [2023-11-06 22:32:44,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 450 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:32:44,515 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 195 flow [2023-11-06 22:32:44,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2023-11-06 22:32:44,517 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -4 predicate places. [2023-11-06 22:32:44,517 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 195 flow [2023-11-06 22:32:44,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:44,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:44,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:44,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:32:44,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-06 22:32:44,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:44,521 INFO L85 PathProgramCache]: Analyzing trace with hash 923367647, now seen corresponding path program 1 times [2023-11-06 22:32:44,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:44,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607221869] [2023-11-06 22:32:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:44,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:44,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:44,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607221869] [2023-11-06 22:32:44,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607221869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:44,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:44,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:32:44,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917874449] [2023-11-06 22:32:44,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:44,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:44,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:44,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 305 [2023-11-06 22:32:44,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:44,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:44,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 305 [2023-11-06 22:32:44,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:46,733 INFO L124 PetriNetUnfolderBase]: 6454/12062 cut-off events. [2023-11-06 22:32:46,733 INFO L125 PetriNetUnfolderBase]: For 4653/4653 co-relation queries the response was YES. [2023-11-06 22:32:46,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26649 conditions, 12062 events. 6454/12062 cut-off events. For 4653/4653 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 102019 event pairs, 1841 based on Foata normal form. 0/8048 useless extension candidates. Maximal degree in co-relation 26638. Up to 5289 conditions per place. [2023-11-06 22:32:46,847 INFO L140 encePairwiseOnDemand]: 287/305 looper letters, 86 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2023-11-06 22:32:46,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 518 flow [2023-11-06 22:32:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:32:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-11-06 22:32:46,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521311475409836 [2023-11-06 22:32:46,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-11-06 22:32:46,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-11-06 22:32:46,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:46,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-11-06 22:32:46,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:46,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:46,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:46,857 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 195 flow. Second operand 3 states and 477 transitions. [2023-11-06 22:32:46,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 518 flow [2023-11-06 22:32:46,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 122 transitions, 500 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:32:46,871 INFO L231 Difference]: Finished difference. Result has 82 places, 91 transitions, 325 flow [2023-11-06 22:32:46,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=82, PETRI_TRANSITIONS=91} [2023-11-06 22:32:46,876 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2023-11-06 22:32:46,876 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 91 transitions, 325 flow [2023-11-06 22:32:46,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:46,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:46,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:46,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:32:46,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-06 22:32:46,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash 923367648, now seen corresponding path program 1 times [2023-11-06 22:32:46,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:46,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139912884] [2023-11-06 22:32:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:46,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:47,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:47,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139912884] [2023-11-06 22:32:47,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139912884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:47,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:47,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:32:47,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599416408] [2023-11-06 22:32:47,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:47,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:47,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:47,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:47,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:47,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 305 [2023-11-06 22:32:47,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 91 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:47,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:47,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 305 [2023-11-06 22:32:47,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:49,001 INFO L124 PetriNetUnfolderBase]: 5006/9340 cut-off events. [2023-11-06 22:32:49,001 INFO L125 PetriNetUnfolderBase]: For 4892/5046 co-relation queries the response was YES. [2023-11-06 22:32:49,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23730 conditions, 9340 events. 5006/9340 cut-off events. For 4892/5046 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 73918 event pairs, 1689 based on Foata normal form. 980/7241 useless extension candidates. Maximal degree in co-relation 23719. Up to 6875 conditions per place. [2023-11-06 22:32:49,092 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 81 selfloop transitions, 9 changer transitions 0/111 dead transitions. [2023-11-06 22:32:49,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 564 flow [2023-11-06 22:32:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:32:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-11-06 22:32:49,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191256830601093 [2023-11-06 22:32:49,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-11-06 22:32:49,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-11-06 22:32:49,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:49,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-11-06 22:32:49,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:49,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:49,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:49,104 INFO L175 Difference]: Start difference. First operand has 82 places, 91 transitions, 325 flow. Second operand 3 states and 475 transitions. [2023-11-06 22:32:49,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 564 flow [2023-11-06 22:32:49,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 534 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:32:49,128 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 301 flow [2023-11-06 22:32:49,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2023-11-06 22:32:49,130 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -8 predicate places. [2023-11-06 22:32:49,130 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 301 flow [2023-11-06 22:32:49,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:49,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:49,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:49,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:32:49,131 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-06 22:32:49,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1701894128, now seen corresponding path program 1 times [2023-11-06 22:32:49,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:49,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394355521] [2023-11-06 22:32:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:49,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:49,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394355521] [2023-11-06 22:32:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394355521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:49,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:49,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:32:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753986357] [2023-11-06 22:32:49,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:49,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:32:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:32:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:32:49,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 305 [2023-11-06 22:32:49,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:49,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:49,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 305 [2023-11-06 22:32:49,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:50,940 INFO L124 PetriNetUnfolderBase]: 5484/10298 cut-off events. [2023-11-06 22:32:50,940 INFO L125 PetriNetUnfolderBase]: For 4830/4988 co-relation queries the response was YES. [2023-11-06 22:32:50,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25230 conditions, 10298 events. 5484/10298 cut-off events. For 4830/4988 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 81050 event pairs, 2618 based on Foata normal form. 0/6644 useless extension candidates. Maximal degree in co-relation 25219. Up to 8717 conditions per place. [2023-11-06 22:32:51,125 INFO L140 encePairwiseOnDemand]: 295/305 looper letters, 84 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2023-11-06 22:32:51,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 565 flow [2023-11-06 22:32:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:32:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:32:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 613 transitions. [2023-11-06 22:32:51,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024590163934426 [2023-11-06 22:32:51,130 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 613 transitions. [2023-11-06 22:32:51,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 613 transitions. [2023-11-06 22:32:51,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:51,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 613 transitions. [2023-11-06 22:32:51,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:51,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:51,137 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:51,137 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 301 flow. Second operand 4 states and 613 transitions. [2023-11-06 22:32:51,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 565 flow [2023-11-06 22:32:51,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 110 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:32:51,168 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 338 flow [2023-11-06 22:32:51,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=338, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2023-11-06 22:32:51,172 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2023-11-06 22:32:51,172 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 338 flow [2023-11-06 22:32:51,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:51,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:51,173 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:32:51,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:32:51,173 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-06 22:32:51,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash 493355950, now seen corresponding path program 1 times [2023-11-06 22:32:51,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:51,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653237810] [2023-11-06 22:32:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:51,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:32:51,192 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:32:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:32:51,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:32:51,225 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:32:51,225 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2023-11-06 22:32:51,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-11-06 22:32:51,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-11-06 22:32:51,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-11-06 22:32:51,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2023-11-06 22:32:51,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 49 remaining) [2023-11-06 22:32:51,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-11-06 22:32:51,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-11-06 22:32:51,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-11-06 22:32:51,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (39 of 49 remaining) [2023-11-06 22:32:51,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-11-06 22:32:51,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-11-06 22:32:51,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (36 of 49 remaining) [2023-11-06 22:32:51,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 49 remaining) [2023-11-06 22:32:51,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-11-06 22:32:51,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (33 of 49 remaining) [2023-11-06 22:32:51,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-11-06 22:32:51,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-11-06 22:32:51,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (30 of 49 remaining) [2023-11-06 22:32:51,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-11-06 22:32:51,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-11-06 22:32:51,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-11-06 22:32:51,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-11-06 22:32:51,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-11-06 22:32:51,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-11-06 22:32:51,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-11-06 22:32:51,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-11-06 22:32:51,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 49 remaining) [2023-11-06 22:32:51,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-11-06 22:32:51,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-11-06 22:32:51,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 49 remaining) [2023-11-06 22:32:51,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 49 remaining) [2023-11-06 22:32:51,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-11-06 22:32:51,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (15 of 49 remaining) [2023-11-06 22:32:51,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2023-11-06 22:32:51,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-11-06 22:32:51,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-11-06 22:32:51,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-11-06 22:32:51,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-11-06 22:32:51,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-11-06 22:32:51,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-11-06 22:32:51,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-11-06 22:32:51,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 49 remaining) [2023-11-06 22:32:51,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-11-06 22:32:51,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-11-06 22:32:51,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 49 remaining) [2023-11-06 22:32:51,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 49 remaining) [2023-11-06 22:32:51,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-11-06 22:32:51,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (0 of 49 remaining) [2023-11-06 22:32:51,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:32:51,241 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-06 22:32:51,243 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:32:51,243 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:32:51,322 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:32:51,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 240 transitions, 498 flow [2023-11-06 22:32:51,391 INFO L124 PetriNetUnfolderBase]: 22/292 cut-off events. [2023-11-06 22:32:51,391 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:32:51,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 292 events. 22/292 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1119 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 222. Up to 8 conditions per place. [2023-11-06 22:32:51,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 240 transitions, 498 flow [2023-11-06 22:32:51,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 240 transitions, 498 flow [2023-11-06 22:32:51,403 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:32:51,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 240 transitions, 498 flow [2023-11-06 22:32:51,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 240 transitions, 498 flow [2023-11-06 22:32:51,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 240 transitions, 498 flow [2023-11-06 22:32:51,450 INFO L124 PetriNetUnfolderBase]: 22/292 cut-off events. [2023-11-06 22:32:51,450 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:32:51,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 292 events. 22/292 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1119 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 222. Up to 8 conditions per place. [2023-11-06 22:32:51,487 INFO L119 LiptonReduction]: Number of co-enabled transitions 35904 [2023-11-06 22:32:55,550 INFO L134 LiptonReduction]: Checked pairs total: 125836 [2023-11-06 22:32:55,550 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-11-06 22:32:55,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:32:55,553 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;@7cdb071e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:32:55,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-06 22:32:55,554 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:32:55,554 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:32:55,554 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:32:55,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:55,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:32:55,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-06 22:32:55,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:55,556 INFO L85 PathProgramCache]: Analyzing trace with hash 44466, now seen corresponding path program 1 times [2023-11-06 22:32:55,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:55,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599647601] [2023-11-06 22:32:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:55,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:55,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:55,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599647601] [2023-11-06 22:32:55,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599647601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:55,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:55,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:32:55,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052175400] [2023-11-06 22:32:55,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:55,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:55,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:55,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:55,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:55,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 430 [2023-11-06 22:32:55,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:55,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:55,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 430 [2023-11-06 22:32:55,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand