./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 cf1a7837 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_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.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_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:53:49,146 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:53:49,263 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:53:49,269 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:53:49,270 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:53:49,320 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:53:49,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:53:49,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:53:49,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:53:49,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:53:49,331 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:53:49,332 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:53:49,332 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:53:49,334 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:53:49,335 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:53:49,335 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:53:49,336 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:53:49,336 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:53:49,337 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:53:49,337 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:53:49,338 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:53:49,338 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:53:49,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:53:49,340 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:53:49,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:53:49,341 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:53:49,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:53:49,342 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:53:49,342 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:53:49,343 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:53:49,344 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:53:49,344 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:53:49,344 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:53:49,345 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:53:49,345 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:53:49,345 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:53:49,346 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:53:49,346 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:53:49,346 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:53:49,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:53:49,347 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:53:49,347 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:53:49,347 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:53:49,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:53:49,348 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:53:49,348 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:53:49,349 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 [2023-11-12 00:53:49,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:53:49,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:53:49,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:53:49,663 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:53:49,664 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:53:49,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-12 00:53:52,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:53:53,056 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:53:53,056 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-12 00:53:53,071 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/data/010300fbf/7f43a457f97c4c64818e128595d98f33/FLAG2b958887d [2023-11-12 00:53:53,089 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/data/010300fbf/7f43a457f97c4c64818e128595d98f33 [2023-11-12 00:53:53,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:53:53,093 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:53:53,094 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:53:53,104 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:53:53,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:53:53,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d03b554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53, skipping insertion in model container [2023-11-12 00:53:53,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,170 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:53:53,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:53:53,556 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:53:53,625 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:53:53,677 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:53:53,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53 WrapperNode [2023-11-12 00:53:53,677 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:53:53,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:53:53,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:53:53,679 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:53:53,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,719 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,751 INFO L138 Inliner]: procedures = 171, calls = 27, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 87 [2023-11-12 00:53:53,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:53:53,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:53:53,752 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:53:53,752 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:53:53,761 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,771 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,780 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,783 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,788 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:53:53,789 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:53:53,789 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:53:53,789 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:53:53,790 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (1/1) ... [2023-11-12 00:53:53,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:53:53,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:53,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:53:53,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59ddac-499e-4fc0-85c1-1f2c92f776fd/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:53:53,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:53:53,881 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 00:53:53,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 00:53:53,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:53:53,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:53:53,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:53:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:53:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:53:53,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:53:53,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:53:53,886 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 00:53:54,016 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:53:54,018 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:53:54,247 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:53:54,344 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:53:54,344 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:53:54,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:53:54 BoogieIcfgContainer [2023-11-12 00:53:54,347 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:53:54,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:53:54,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:53:54,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:53:54,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:53:53" (1/3) ... [2023-11-12 00:53:54,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f6ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:53:54, skipping insertion in model container [2023-11-12 00:53:54,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:53" (2/3) ... [2023-11-12 00:53:54,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f6ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:53:54, skipping insertion in model container [2023-11-12 00:53:54,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:53:54" (3/3) ... [2023-11-12 00:53:54,356 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-11-12 00:53:54,380 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:53:54,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-12 00:53:54,381 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:53:54,506 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:53:54,546 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:53:54,567 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 102 transitions, 208 flow [2023-11-12 00:53:54,573 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 102 transitions, 208 flow [2023-11-12 00:53:54,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 208 flow [2023-11-12 00:53:54,656 INFO L124 PetriNetUnfolderBase]: 8/118 cut-off events. [2023-11-12 00:53:54,656 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 00:53:54,663 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. [2023-11-12 00:53:54,674 INFO L119 LiptonReduction]: Number of co-enabled transitions 2584 [2023-11-12 00:53:58,031 INFO L134 LiptonReduction]: Checked pairs total: 5368 [2023-11-12 00:53:58,032 INFO L136 LiptonReduction]: Total number of compositions: 163 [2023-11-12 00:53:58,042 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 36 transitions, 76 flow [2023-11-12 00:53:58,075 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 213 states, 131 states have (on average 3.068702290076336) internal successors, (402), 212 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:53:58,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:53:58,110 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=FINITE_AUTOMATA, 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;@2f961366, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:53:58,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-11-12 00:53:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 131 states have (on average 3.068702290076336) internal successors, (402), 212 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:53:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:53:58,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:58,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:53:58,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-12 00:53:58,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash 17597, now seen corresponding path program 1 times [2023-11-12 00:53:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:58,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558348765] [2023-11-12 00:53:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:58,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:58,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:58,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558348765] [2023-11-12 00:53:58,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558348765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:58,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:58,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:53:58,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855607484] [2023-11-12 00:53:58,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:58,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:53:58,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:58,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:53:58,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:53:58,549 INFO L87 Difference]: Start difference. First operand has 213 states, 131 states have (on average 3.068702290076336) internal successors, (402), 212 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:53:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:58,614 INFO L93 Difference]: Finished difference Result 69 states and 121 transitions. [2023-11-12 00:53:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:53:58,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:53:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:58,629 INFO L225 Difference]: With dead ends: 69 [2023-11-12 00:53:58,630 INFO L226 Difference]: Without dead ends: 69 [2023-11-12 00:53:58,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:53:58,636 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:58,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:53:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-12 00:53:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-12 00:53:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 68 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:53:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 121 transitions. [2023-11-12 00:53:58,694 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 121 transitions. Word has length 2 [2023-11-12 00:53:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:58,696 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 121 transitions. [2023-11-12 00:53:58,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:53:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 121 transitions. [2023-11-12 00:53:58,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:53:58,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:58,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:53:58,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:53:58,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-12 00:53:58,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash 17598, now seen corresponding path program 1 times [2023-11-12 00:53:58,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:58,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147867401] [2023-11-12 00:53:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:58,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:58,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:58,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147867401] [2023-11-12 00:53:58,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147867401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:58,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:58,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:53:58,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561537233] [2023-11-12 00:53:58,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:58,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:53:58,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:58,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:53:58,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:53:58,808 INFO L87 Difference]: Start difference. First operand 69 states and 121 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:53:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:58,872 INFO L93 Difference]: Finished difference Result 111 states and 194 transitions. [2023-11-12 00:53:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:53:58,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:53:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:58,880 INFO L225 Difference]: With dead ends: 111 [2023-11-12 00:53:58,880 INFO L226 Difference]: Without dead ends: 111 [2023-11-12 00:53:58,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:53:58,882 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:58,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 5 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:53:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-12 00:53:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2023-11-12 00:53:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 86 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:53:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 158 transitions. [2023-11-12 00:53:58,916 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 158 transitions. Word has length 2 [2023-11-12 00:53:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:58,917 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 158 transitions. [2023-11-12 00:53:58,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:53:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 158 transitions. [2023-11-12 00:53:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:53:58,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:58,922 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 00:53:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:53:58,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-12 00:53:58,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:58,923 INFO L85 PathProgramCache]: Analyzing trace with hash -917762787, now seen corresponding path program 1 times [2023-11-12 00:53:58,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:58,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888706211] [2023-11-12 00:53:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:53:58,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:53:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:53:58,994 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:53:58,994 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:53:58,995 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2023-11-12 00:53:58,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 34 remaining) [2023-11-12 00:53:58,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2023-11-12 00:53:58,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2023-11-12 00:53:59,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2023-11-12 00:53:59,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 34 remaining) [2023-11-12 00:53:59,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2023-11-12 00:53:59,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2023-11-12 00:53:59,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2023-11-12 00:53:59,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (24 of 34 remaining) [2023-11-12 00:53:59,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2023-11-12 00:53:59,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2023-11-12 00:53:59,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (21 of 34 remaining) [2023-11-12 00:53:59,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 34 remaining) [2023-11-12 00:53:59,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2023-11-12 00:53:59,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (18 of 34 remaining) [2023-11-12 00:53:59,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2023-11-12 00:53:59,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2023-11-12 00:53:59,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (15 of 34 remaining) [2023-11-12 00:53:59,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2023-11-12 00:53:59,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2023-11-12 00:53:59,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2023-11-12 00:53:59,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2023-11-12 00:53:59,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 34 remaining) [2023-11-12 00:53:59,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2023-11-12 00:53:59,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2023-11-12 00:53:59,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2023-11-12 00:53:59,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 34 remaining) [2023-11-12 00:53:59,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2023-11-12 00:53:59,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2023-11-12 00:53:59,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 34 remaining) [2023-11-12 00:53:59,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 34 remaining) [2023-11-12 00:53:59,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 34 remaining) [2023-11-12 00:53:59,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (0 of 34 remaining) [2023-11-12 00:53:59,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:53:59,018 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 00:53:59,020 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:53:59,021 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 00:53:59,098 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:53:59,108 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:53:59,108 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 171 transitions, 352 flow [2023-11-12 00:53:59,110 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 171 transitions, 352 flow [2023-11-12 00:53:59,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 171 transitions, 352 flow [2023-11-12 00:53:59,206 INFO L124 PetriNetUnfolderBase]: 15/205 cut-off events. [2023-11-12 00:53:59,207 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 00:53:59,215 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. [2023-11-12 00:53:59,228 INFO L119 LiptonReduction]: Number of co-enabled transitions 14552 [2023-11-12 00:54:02,729 INFO L134 LiptonReduction]: Checked pairs total: 62401 [2023-11-12 00:54:02,730 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-11-12 00:54:02,732 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 79 transitions, 168 flow [2023-11-12 00:54:03,070 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9772 states, 8427 states have (on average 3.4263676278628217) internal successors, (28874), 9771 states have internal predecessors, (28874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:03,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:54:03,072 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=FINITE_AUTOMATA, 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;@2f961366, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:54:03,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-11-12 00:54:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 9772 states, 8427 states have (on average 3.4263676278628217) internal successors, (28874), 9771 states have internal predecessors, (28874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:54:03,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:03,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:54:03,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-12 00:54:03,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:03,109 INFO L85 PathProgramCache]: Analyzing trace with hash 30547, now seen corresponding path program 1 times [2023-11-12 00:54:03,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:03,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668314887] [2023-11-12 00:54:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:03,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:03,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:03,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668314887] [2023-11-12 00:54:03,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668314887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:03,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:03,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:54:03,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711032093] [2023-11-12 00:54:03,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:03,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:03,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:03,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:03,184 INFO L87 Difference]: Start difference. First operand has 9772 states, 8427 states have (on average 3.4263676278628217) internal successors, (28874), 9771 states have internal predecessors, (28874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:03,607 INFO L93 Difference]: Finished difference Result 12975 states and 37002 transitions. [2023-11-12 00:54:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:03,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:54:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:03,852 INFO L225 Difference]: With dead ends: 12975 [2023-11-12 00:54:03,852 INFO L226 Difference]: Without dead ends: 12975 [2023-11-12 00:54:03,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:03,856 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:03,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:54:03,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2023-11-12 00:54:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 10037. [2023-11-12 00:54:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10037 states, 9331 states have (on average 3.222805701425356) internal successors, (30072), 10036 states have internal predecessors, (30072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10037 states to 10037 states and 30072 transitions. [2023-11-12 00:54:04,396 INFO L78 Accepts]: Start accepts. Automaton has 10037 states and 30072 transitions. Word has length 2 [2023-11-12 00:54:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:04,397 INFO L495 AbstractCegarLoop]: Abstraction has 10037 states and 30072 transitions. [2023-11-12 00:54:04,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 10037 states and 30072 transitions. [2023-11-12 00:54:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:54:04,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:04,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:54:04,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:54:04,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-12 00:54:04,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash 30548, now seen corresponding path program 1 times [2023-11-12 00:54:04,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:04,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170811341] [2023-11-12 00:54:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:04,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:04,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:04,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170811341] [2023-11-12 00:54:04,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170811341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:04,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:04,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:54:04,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676981024] [2023-11-12 00:54:04,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:04,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:04,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:04,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:04,465 INFO L87 Difference]: Start difference. First operand 10037 states and 30072 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:04,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:04,649 INFO L93 Difference]: Finished difference Result 9012 states and 26043 transitions. [2023-11-12 00:54:04,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:04,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:54:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:04,850 INFO L225 Difference]: With dead ends: 9012 [2023-11-12 00:54:04,850 INFO L226 Difference]: Without dead ends: 9012 [2023-11-12 00:54:04,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:04,852 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:04,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:54:04,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2023-11-12 00:54:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 9012. [2023-11-12 00:54:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9012 states, 8547 states have (on average 3.047034047034047) internal successors, (26043), 9011 states have internal predecessors, (26043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9012 states to 9012 states and 26043 transitions. [2023-11-12 00:54:05,292 INFO L78 Accepts]: Start accepts. Automaton has 9012 states and 26043 transitions. Word has length 2 [2023-11-12 00:54:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:05,293 INFO L495 AbstractCegarLoop]: Abstraction has 9012 states and 26043 transitions. [2023-11-12 00:54:05,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 9012 states and 26043 transitions. [2023-11-12 00:54:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:54:05,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:05,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:05,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:54:05,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-12 00:54:05,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash -920080212, now seen corresponding path program 1 times [2023-11-12 00:54:05,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:05,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778434281] [2023-11-12 00:54:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:05,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778434281] [2023-11-12 00:54:05,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778434281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:05,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:05,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:54:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269607607] [2023-11-12 00:54:05,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:05,467 INFO L87 Difference]: Start difference. First operand 9012 states and 26043 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:05,753 INFO L93 Difference]: Finished difference Result 12360 states and 35667 transitions. [2023-11-12 00:54:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:54:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:05,895 INFO L225 Difference]: With dead ends: 12360 [2023-11-12 00:54:05,896 INFO L226 Difference]: Without dead ends: 12360 [2023-11-12 00:54:05,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:05,897 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:05,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 44 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:54:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12360 states. [2023-11-12 00:54:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12360 to 10200. [2023-11-12 00:54:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10200 states, 9741 states have (on average 3.1810902371419774) internal successors, (30987), 10199 states have internal predecessors, (30987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10200 states to 10200 states and 30987 transitions. [2023-11-12 00:54:06,376 INFO L78 Accepts]: Start accepts. Automaton has 10200 states and 30987 transitions. Word has length 7 [2023-11-12 00:54:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:06,377 INFO L495 AbstractCegarLoop]: Abstraction has 10200 states and 30987 transitions. [2023-11-12 00:54:06,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 10200 states and 30987 transitions. [2023-11-12 00:54:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:54:06,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:06,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:06,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:54:06,379 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-12 00:54:06,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash -920080211, now seen corresponding path program 1 times [2023-11-12 00:54:06,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:06,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616358935] [2023-11-12 00:54:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:06,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:06,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616358935] [2023-11-12 00:54:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616358935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:06,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:06,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:54:06,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005157382] [2023-11-12 00:54:06,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:06,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:06,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:06,530 INFO L87 Difference]: Start difference. First operand 10200 states and 30987 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:06,766 INFO L93 Difference]: Finished difference Result 8508 states and 25071 transitions. [2023-11-12 00:54:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:06,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:54:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:06,816 INFO L225 Difference]: With dead ends: 8508 [2023-11-12 00:54:06,816 INFO L226 Difference]: Without dead ends: 8508 [2023-11-12 00:54:06,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:06,818 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:06,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 39 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:54:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8508 states. [2023-11-12 00:54:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8508 to 8508. [2023-11-12 00:54:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8508 states, 8235 states have (on average 3.0444444444444443) internal successors, (25071), 8507 states have internal predecessors, (25071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8508 states to 8508 states and 25071 transitions. [2023-11-12 00:54:07,287 INFO L78 Accepts]: Start accepts. Automaton has 8508 states and 25071 transitions. Word has length 7 [2023-11-12 00:54:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:07,287 INFO L495 AbstractCegarLoop]: Abstraction has 8508 states and 25071 transitions. [2023-11-12 00:54:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 8508 states and 25071 transitions. [2023-11-12 00:54:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:54:07,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:07,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:07,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:54:07,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-12 00:54:07,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash 566208446, now seen corresponding path program 1 times [2023-11-12 00:54:07,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:07,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186575744] [2023-11-12 00:54:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:07,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:07,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:07,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186575744] [2023-11-12 00:54:07,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186575744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:07,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:07,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:54:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373320763] [2023-11-12 00:54:07,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:07,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:54:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:54:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:54:07,445 INFO L87 Difference]: Start difference. First operand 8508 states and 25071 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:07,663 INFO L93 Difference]: Finished difference Result 9047 states and 26569 transitions. [2023-11-12 00:54:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:54:07,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:54:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:07,792 INFO L225 Difference]: With dead ends: 9047 [2023-11-12 00:54:07,792 INFO L226 Difference]: Without dead ends: 9047 [2023-11-12 00:54:07,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:54:07,793 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:07,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 64 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:54:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2023-11-12 00:54:08,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 8842. [2023-11-12 00:54:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8842 states, 8569 states have (on average 3.03407632162446) internal successors, (25999), 8841 states have internal predecessors, (25999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 25999 transitions. [2023-11-12 00:54:08,141 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 25999 transitions. Word has length 9 [2023-11-12 00:54:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:08,141 INFO L495 AbstractCegarLoop]: Abstraction has 8842 states and 25999 transitions. [2023-11-12 00:54:08,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 25999 transitions. [2023-11-12 00:54:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:54:08,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:08,143 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:08,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:54:08,143 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-12 00:54:08,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:08,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1362276388, now seen corresponding path program 1 times [2023-11-12 00:54:08,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:08,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164704873] [2023-11-12 00:54:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:08,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:54:08,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:08,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164704873] [2023-11-12 00:54:08,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164704873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:08,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:08,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:54:08,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615531540] [2023-11-12 00:54:08,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:08,216 INFO L87 Difference]: Start difference. First operand 8842 states and 25999 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:08,458 INFO L93 Difference]: Finished difference Result 10190 states and 29762 transitions. [2023-11-12 00:54:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:08,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 00:54:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:08,519 INFO L225 Difference]: With dead ends: 10190 [2023-11-12 00:54:08,519 INFO L226 Difference]: Without dead ends: 10190 [2023-11-12 00:54:08,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:08,520 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:08,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 35 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:54:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2023-11-12 00:54:08,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 8936. [2023-11-12 00:54:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8936 states, 8735 states have (on average 3.097309673726388) internal successors, (27055), 8935 states have internal predecessors, (27055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8936 states to 8936 states and 27055 transitions. [2023-11-12 00:54:08,926 INFO L78 Accepts]: Start accepts. Automaton has 8936 states and 27055 transitions. Word has length 11 [2023-11-12 00:54:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:08,927 INFO L495 AbstractCegarLoop]: Abstraction has 8936 states and 27055 transitions. [2023-11-12 00:54:08,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8936 states and 27055 transitions. [2023-11-12 00:54:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:54:08,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:08,931 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:08,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:54:08,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-12 00:54:08,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:08,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1362276389, now seen corresponding path program 1 times [2023-11-12 00:54:08,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:08,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433566212] [2023-11-12 00:54:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:08,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:54:09,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:09,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433566212] [2023-11-12 00:54:09,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433566212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:09,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:09,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:54:09,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477726713] [2023-11-12 00:54:09,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:09,054 INFO L87 Difference]: Start difference. First operand 8936 states and 27055 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:09,217 INFO L93 Difference]: Finished difference Result 7206 states and 21251 transitions. [2023-11-12 00:54:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 00:54:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:09,257 INFO L225 Difference]: With dead ends: 7206 [2023-11-12 00:54:09,258 INFO L226 Difference]: Without dead ends: 7206 [2023-11-12 00:54:09,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:09,259 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:09,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:54:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7206 states. [2023-11-12 00:54:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7206 to 7206. [2023-11-12 00:54:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7113 states have (on average 2.9876282862364683) internal successors, (21251), 7205 states have internal predecessors, (21251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 21251 transitions. [2023-11-12 00:54:09,600 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 21251 transitions. Word has length 11 [2023-11-12 00:54:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:09,600 INFO L495 AbstractCegarLoop]: Abstraction has 7206 states and 21251 transitions. [2023-11-12 00:54:09,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 21251 transitions. [2023-11-12 00:54:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:54:09,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:09,608 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 00:54:09,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:54:09,608 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-12 00:54:09,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:09,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1361052291, now seen corresponding path program 1 times [2023-11-12 00:54:09,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:09,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814406307] [2023-11-12 00:54:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:09,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:54:09,623 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:54:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:54:09,636 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:54:09,636 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:54:09,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2023-11-12 00:54:09,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-11-12 00:54:09,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-11-12 00:54:09,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-11-12 00:54:09,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2023-11-12 00:54:09,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 49 remaining) [2023-11-12 00:54:09,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-11-12 00:54:09,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-11-12 00:54:09,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-11-12 00:54:09,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (39 of 49 remaining) [2023-11-12 00:54:09,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-11-12 00:54:09,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-11-12 00:54:09,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (36 of 49 remaining) [2023-11-12 00:54:09,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 49 remaining) [2023-11-12 00:54:09,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-11-12 00:54:09,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (33 of 49 remaining) [2023-11-12 00:54:09,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-11-12 00:54:09,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-11-12 00:54:09,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (30 of 49 remaining) [2023-11-12 00:54:09,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-11-12 00:54:09,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-11-12 00:54:09,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-11-12 00:54:09,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-11-12 00:54:09,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-11-12 00:54:09,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-11-12 00:54:09,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-11-12 00:54:09,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-11-12 00:54:09,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 49 remaining) [2023-11-12 00:54:09,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-11-12 00:54:09,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-11-12 00:54:09,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 49 remaining) [2023-11-12 00:54:09,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 49 remaining) [2023-11-12 00:54:09,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-11-12 00:54:09,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (15 of 49 remaining) [2023-11-12 00:54:09,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2023-11-12 00:54:09,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-11-12 00:54:09,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-11-12 00:54:09,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-11-12 00:54:09,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-11-12 00:54:09,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-11-12 00:54:09,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-11-12 00:54:09,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-11-12 00:54:09,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 49 remaining) [2023-11-12 00:54:09,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-11-12 00:54:09,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-11-12 00:54:09,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 49 remaining) [2023-11-12 00:54:09,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 49 remaining) [2023-11-12 00:54:09,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-11-12 00:54:09,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (0 of 49 remaining) [2023-11-12 00:54:09,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:54:09,644 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:09,644 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:54:09,644 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 00:54:09,763 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:54:09,769 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:54:09,769 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 240 transitions, 498 flow [2023-11-12 00:54:09,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 240 transitions, 498 flow [2023-11-12 00:54:09,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 240 transitions, 498 flow [2023-11-12 00:54:09,851 INFO L124 PetriNetUnfolderBase]: 22/292 cut-off events. [2023-11-12 00:54:09,851 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 00:54:09,856 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. [2023-11-12 00:54:09,883 INFO L119 LiptonReduction]: Number of co-enabled transitions 35904 [2023-11-12 00:54:14,600 INFO L134 LiptonReduction]: Checked pairs total: 164513 [2023-11-12 00:54:14,600 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-11-12 00:54:14,601 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 115 places, 116 transitions, 250 flow [2023-11-12 00:54:25,702 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 332412 states, 310844 states have (on average 4.293256424444416) internal successors, (1334533), 332411 states have internal predecessors, (1334533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:25,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:54:25,703 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=FINITE_AUTOMATA, 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;@2f961366, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:54:25,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-12 00:54:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 332412 states, 310844 states have (on average 4.293256424444416) internal successors, (1334533), 332411 states have internal predecessors, (1334533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:26,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:54:26,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:26,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:54:26,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-12 00:54:26,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:26,085 INFO L85 PathProgramCache]: Analyzing trace with hash 46948, now seen corresponding path program 1 times [2023-11-12 00:54:26,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:26,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769872733] [2023-11-12 00:54:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:26,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:26,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769872733] [2023-11-12 00:54:26,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769872733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:26,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:26,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:54:26,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982683345] [2023-11-12 00:54:26,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:26,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:26,470 INFO L87 Difference]: Start difference. First operand has 332412 states, 310844 states have (on average 4.293256424444416) internal successors, (1334533), 332411 states have internal predecessors, (1334533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:35,001 INFO L93 Difference]: Finished difference Result 429129 states and 1679422 transitions. [2023-11-12 00:54:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:35,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:54:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted.