./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longer-1-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longer-1-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh --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 d8aeba05368f3114a9c95156cfeec5f871d57fefc291ffe35d850d07bff2e31c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:53:24,952 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:53:25,027 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 13:53:25,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:53:25,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:53:25,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:53:25,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:53:25,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:53:25,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:53:25,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:53:25,081 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:53:25,082 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:53:25,083 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:53:25,083 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:53:25,084 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:53:25,084 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:53:25,085 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:53:25,085 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:53:25,086 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:53:25,086 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:53:25,087 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:53:25,088 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:53:25,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 13:53:25,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 13:53:25,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:53:25,090 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:53:25,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:53:25,091 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:53:25,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:53:25,092 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 13:53:25,092 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 13:53:25,093 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 13:53:25,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:53:25,093 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 13:53:25,093 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:53:25,094 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:53:25,094 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:53:25,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:53:25,094 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:53:25,094 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:53:25,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:53:25,095 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:53:25,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:53:25,095 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:53:25,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:53:25,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:53:25,096 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:53:25,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:53:25,096 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_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8aeba05368f3114a9c95156cfeec5f871d57fefc291ffe35d850d07bff2e31c [2023-12-02 13:53:25,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:53:25,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:53:25,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:53:25,307 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:53:25,307 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:53:25,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/pthread-ext/25_stack_longer-1-pthread.i [2023-12-02 13:53:27,949 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:53:28,183 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:53:28,184 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/sv-benchmarks/c/pthread-ext/25_stack_longer-1-pthread.i [2023-12-02 13:53:28,199 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/data/ce07c9508/9367bbc03b6a4058a7a6a0995856e38c/FLAG4403c83a9 [2023-12-02 13:53:28,213 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/data/ce07c9508/9367bbc03b6a4058a7a6a0995856e38c [2023-12-02 13:53:28,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:53:28,217 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:53:28,219 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:53:28,219 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:53:28,225 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:53:28,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e303d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28, skipping insertion in model container [2023-12-02 13:53:28,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,278 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:53:28,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:53:28,584 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:53:28,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:53:28,658 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:53:28,658 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:53:28,664 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:53:28,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28 WrapperNode [2023-12-02 13:53:28,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:53:28,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:53:28,666 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:53:28,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:53:28,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,704 INFO L138 Inliner]: procedures = 172, calls = 39, calls flagged for inlining = 10, calls inlined = 9, statements flattened = 138 [2023-12-02 13:53:28,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:53:28,705 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:53:28,705 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:53:28,705 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:53:28,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,721 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,723 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,726 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,727 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,730 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:53:28,731 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:53:28,731 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:53:28,731 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:53:28,732 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (1/1) ... [2023-12-02 13:53:28,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:53:28,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:53:28,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:53:28,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd53fd4-4fcb-4f12-bc14-5847fe319332/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:53:28,793 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-02 13:53:28,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-02 13:53:28,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:53:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-02 13:53:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 13:53:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:53:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:53:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:53:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:53:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 13:53:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-02 13:53:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:53:28,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:53:28,797 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 13:53:28,933 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:53:28,935 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:53:29,145 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:53:29,310 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:53:29,310 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 13:53:29,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:53:29 BoogieIcfgContainer [2023-12-02 13:53:29,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:53:29,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:53:29,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:53:29,317 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:53:29,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:53:28" (1/3) ... [2023-12-02 13:53:29,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705905dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:53:29, skipping insertion in model container [2023-12-02 13:53:29,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:53:28" (2/3) ... [2023-12-02 13:53:29,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705905dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:53:29, skipping insertion in model container [2023-12-02 13:53:29,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:53:29" (3/3) ... [2023-12-02 13:53:29,320 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-1-pthread.i [2023-12-02 13:53:29,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:53:29,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-12-02 13:53:29,335 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 13:53:29,397 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 13:53:29,426 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 44 transitions, 92 flow [2023-12-02 13:53:29,490 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 306 states, 284 states have (on average 2.1232394366197185) internal successors, (603), 305 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:29,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:53:29,526 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;@2f2754b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:53:29,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-12-02 13:53:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 306 states, 284 states have (on average 2.1232394366197185) internal successors, (603), 305 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 13:53:29,536 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:29,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 13:53:29,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:53:29,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:29,543 INFO L85 PathProgramCache]: Analyzing trace with hash 408259, now seen corresponding path program 1 times [2023-12-02 13:53:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:29,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245374132] [2023-12-02 13:53:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:53:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:53:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:53:29,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:53:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245374132] [2023-12-02 13:53:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245374132] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:53:29,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:53:29,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 13:53:29,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834669188] [2023-12-02 13:53:29,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:53:29,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:53:29,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:53:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:53:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:53:29,817 INFO L87 Difference]: Start difference. First operand has 306 states, 284 states have (on average 2.1232394366197185) internal successors, (603), 305 states have internal predecessors, (603), 0 states have call successors, (0), 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 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:53:29,886 INFO L93 Difference]: Finished difference Result 185 states and 347 transitions. [2023-12-02 13:53:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:53:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-12-02 13:53:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:53:29,899 INFO L225 Difference]: With dead ends: 185 [2023-12-02 13:53:29,900 INFO L226 Difference]: Without dead ends: 185 [2023-12-02 13:53:29,901 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 [2023-12-02 13:53:29,904 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:53:29,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 11 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:53:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-02 13:53:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-12-02 13:53:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 176 states have (on average 1.9715909090909092) internal successors, (347), 184 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 347 transitions. [2023-12-02 13:53:29,955 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 347 transitions. Word has length 3 [2023-12-02 13:53:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:53:29,955 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 347 transitions. [2023-12-02 13:53:29,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 347 transitions. [2023-12-02 13:53:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 13:53:29,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:29,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 13:53:29,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:53:29,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:53:29,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:29,958 INFO L85 PathProgramCache]: Analyzing trace with hash 408260, now seen corresponding path program 1 times [2023-12-02 13:53:29,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:29,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31375351] [2023-12-02 13:53:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:29,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:53:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:53:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:53:30,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:53:30,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31375351] [2023-12-02 13:53:30,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31375351] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:53:30,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:53:30,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 13:53:30,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818436242] [2023-12-02 13:53:30,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:53:30,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:53:30,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:53:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:53:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:53:30,073 INFO L87 Difference]: Start difference. First operand 185 states and 347 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:53:30,118 INFO L93 Difference]: Finished difference Result 154 states and 284 transitions. [2023-12-02 13:53:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:53:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-12-02 13:53:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:53:30,121 INFO L225 Difference]: With dead ends: 154 [2023-12-02 13:53:30,121 INFO L226 Difference]: Without dead ends: 154 [2023-12-02 13:53:30,122 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 [2023-12-02 13:53:30,123 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:53:30,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 11 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:53:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-02 13:53:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-12-02 13:53:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 153 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 284 transitions. [2023-12-02 13:53:30,136 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 284 transitions. Word has length 3 [2023-12-02 13:53:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:53:30,136 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 284 transitions. [2023-12-02 13:53:30,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 284 transitions. [2023-12-02 13:53:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 13:53:30,137 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:30,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-12-02 13:53:30,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:53:30,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:53:30,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1874988019, now seen corresponding path program 1 times [2023-12-02 13:53:30,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:30,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384880069] [2023-12-02 13:53:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:30,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:53:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:53:30,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 13:53:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:53:30,195 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 13:53:30,195 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 13:53:30,197 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-12-02 13:53:30,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (8 of 10 remaining) [2023-12-02 13:53:30,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2023-12-02 13:53:30,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (6 of 10 remaining) [2023-12-02 13:53:30,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-12-02 13:53:30,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-12-02 13:53:30,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-12-02 13:53:30,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (2 of 10 remaining) [2023-12-02 13:53:30,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-12-02 13:53:30,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (0 of 10 remaining) [2023-12-02 13:53:30,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:53:30,204 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 13:53:30,206 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 13:53:30,206 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 13:53:30,262 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 13:53:30,265 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 75 places, 78 transitions, 166 flow [2023-12-02 13:53:30,588 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9272 states, 9175 states have (on average 3.1012534059945502) internal successors, (28454), 9271 states have internal predecessors, (28454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:30,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:53:30,590 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;@2f2754b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:53:30,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-12-02 13:53:30,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 9272 states, 9175 states have (on average 3.1012534059945502) internal successors, (28454), 9271 states have internal predecessors, (28454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:30,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 13:53:30,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:30,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 13:53:30,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-12-02 13:53:30,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash 485713, now seen corresponding path program 1 times [2023-12-02 13:53:30,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:30,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472619419] [2023-12-02 13:53:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:30,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:53:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:53:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:53:30,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:53:30,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472619419] [2023-12-02 13:53:30,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472619419] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:53:30,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:53:30,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 13:53:30,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822034642] [2023-12-02 13:53:30,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:53:30,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:53:30,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:53:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:53:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:53:30,694 INFO L87 Difference]: Start difference. First operand has 9272 states, 9175 states have (on average 3.1012534059945502) internal successors, (28454), 9271 states have internal predecessors, (28454), 0 states have call successors, (0), 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 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:53:30,832 INFO L93 Difference]: Finished difference Result 5555 states and 16335 transitions. [2023-12-02 13:53:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:53:30,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-12-02 13:53:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:53:30,877 INFO L225 Difference]: With dead ends: 5555 [2023-12-02 13:53:30,877 INFO L226 Difference]: Without dead ends: 5555 [2023-12-02 13:53:30,877 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 [2023-12-02 13:53:30,879 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:53:30,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 21 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:53:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5555 states. [2023-12-02 13:53:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5555 to 5555. [2023-12-02 13:53:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5555 states, 5518 states have (on average 2.960311707140268) internal successors, (16335), 5554 states have internal predecessors, (16335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5555 states to 5555 states and 16335 transitions. [2023-12-02 13:53:31,181 INFO L78 Accepts]: Start accepts. Automaton has 5555 states and 16335 transitions. Word has length 3 [2023-12-02 13:53:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:53:31,181 INFO L495 AbstractCegarLoop]: Abstraction has 5555 states and 16335 transitions. [2023-12-02 13:53:31,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5555 states and 16335 transitions. [2023-12-02 13:53:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 13:53:31,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:31,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 13:53:31,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:53:31,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-12-02 13:53:31,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash 485714, now seen corresponding path program 1 times [2023-12-02 13:53:31,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:31,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740589311] [2023-12-02 13:53:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:31,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:53:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:53:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:53:31,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:53:31,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740589311] [2023-12-02 13:53:31,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740589311] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:53:31,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:53:31,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 13:53:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840665721] [2023-12-02 13:53:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:53:31,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:53:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:53:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:53:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:53:31,241 INFO L87 Difference]: Start difference. First operand 5555 states and 16335 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:53:31,408 INFO L93 Difference]: Finished difference Result 4624 states and 13452 transitions. [2023-12-02 13:53:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:53:31,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-12-02 13:53:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:53:31,450 INFO L225 Difference]: With dead ends: 4624 [2023-12-02 13:53:31,450 INFO L226 Difference]: Without dead ends: 4624 [2023-12-02 13:53:31,450 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 [2023-12-02 13:53:31,451 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:53:31,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:53:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2023-12-02 13:53:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 4624. [2023-12-02 13:53:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4608 states have (on average 2.9192708333333335) internal successors, (13452), 4623 states have internal predecessors, (13452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 13452 transitions. [2023-12-02 13:53:31,613 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 13452 transitions. Word has length 3 [2023-12-02 13:53:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:53:31,613 INFO L495 AbstractCegarLoop]: Abstraction has 4624 states and 13452 transitions. [2023-12-02 13:53:31,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 13452 transitions. [2023-12-02 13:53:31,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 13:53:31,615 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:31,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-12-02 13:53:31,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:53:31,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-12-02 13:53:31,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 635840935, now seen corresponding path program 1 times [2023-12-02 13:53:31,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:31,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265272054] [2023-12-02 13:53:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:31,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:53:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:53:31,634 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 13:53:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:53:31,652 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 13:53:31,652 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 13:53:31,652 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-12-02 13:53:31,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (11 of 13 remaining) [2023-12-02 13:53:31,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (10 of 13 remaining) [2023-12-02 13:53:31,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (9 of 13 remaining) [2023-12-02 13:53:31,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-12-02 13:53:31,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-12-02 13:53:31,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-12-02 13:53:31,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (5 of 13 remaining) [2023-12-02 13:53:31,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (4 of 13 remaining) [2023-12-02 13:53:31,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (3 of 13 remaining) [2023-12-02 13:53:31,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (2 of 13 remaining) [2023-12-02 13:53:31,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (1 of 13 remaining) [2023-12-02 13:53:31,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (0 of 13 remaining) [2023-12-02 13:53:31,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:53:31,655 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 13:53:31,655 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 13:53:31,655 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 13:53:31,722 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 13:53:31,725 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 107 places, 112 transitions, 242 flow [2023-12-02 13:53:38,728 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 278364 states, 277964 states have (on average 4.174749248104071) internal successors, (1160430), 278363 states have internal predecessors, (1160430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:38,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:53:38,730 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;@2f2754b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:53:38,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-12-02 13:53:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 278364 states, 277964 states have (on average 4.174749248104071) internal successors, (1160430), 278363 states have internal predecessors, (1160430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 13:53:39,079 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:39,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 13:53:39,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 13:53:39,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash 596929, now seen corresponding path program 1 times [2023-12-02 13:53:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:39,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567376913] [2023-12-02 13:53:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:39,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:53:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:53:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:53:39,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:53:39,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567376913] [2023-12-02 13:53:39,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567376913] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:53:39,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:53:39,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 13:53:39,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558271539] [2023-12-02 13:53:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:53:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:53:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:53:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:53:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:53:39,478 INFO L87 Difference]: Start difference. First operand has 278364 states, 277964 states have (on average 4.174749248104071) internal successors, (1160430), 278363 states have internal predecessors, (1160430), 0 states have call successors, (0), 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 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:53:41,927 INFO L93 Difference]: Finished difference Result 166655 states and 667815 transitions. [2023-12-02 13:53:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:53:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-12-02 13:53:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:53:43,359 INFO L225 Difference]: With dead ends: 166655 [2023-12-02 13:53:43,359 INFO L226 Difference]: Without dead ends: 166655 [2023-12-02 13:53:43,360 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 [2023-12-02 13:53:43,361 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:53:43,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 31 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:53:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166655 states. [2023-12-02 13:53:48,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166655 to 166655. [2023-12-02 13:53:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166655 states, 166506 states have (on average 4.010756369139851) internal successors, (667815), 166654 states have internal predecessors, (667815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166655 states to 166655 states and 667815 transitions. [2023-12-02 13:53:50,001 INFO L78 Accepts]: Start accepts. Automaton has 166655 states and 667815 transitions. Word has length 3 [2023-12-02 13:53:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:53:50,002 INFO L495 AbstractCegarLoop]: Abstraction has 166655 states and 667815 transitions. [2023-12-02 13:53:50,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 166655 states and 667815 transitions. [2023-12-02 13:53:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 13:53:50,002 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:50,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 13:53:50,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:53:50,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 13:53:50,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:50,003 INFO L85 PathProgramCache]: Analyzing trace with hash 596930, now seen corresponding path program 1 times [2023-12-02 13:53:50,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:50,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789344783] [2023-12-02 13:53:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:50,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:53:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:53:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:53:50,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:53:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789344783] [2023-12-02 13:53:50,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789344783] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:53:50,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:53:50,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 13:53:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053473869] [2023-12-02 13:53:50,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:53:50,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:53:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:53:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:53:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:53:50,056 INFO L87 Difference]: Start difference. First operand 166655 states and 667815 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:51,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:53:51,659 INFO L93 Difference]: Finished difference Result 138724 states and 551532 transitions. [2023-12-02 13:53:51,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:53:51,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-12-02 13:53:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:53:52,799 INFO L225 Difference]: With dead ends: 138724 [2023-12-02 13:53:52,800 INFO L226 Difference]: Without dead ends: 138724 [2023-12-02 13:53:52,800 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 [2023-12-02 13:53:52,801 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:53:52,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 31 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:53:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138724 states. [2023-12-02 13:53:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138724 to 138724. [2023-12-02 13:53:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138724 states, 138660 states have (on average 3.9775854608394634) internal successors, (551532), 138723 states have internal predecessors, (551532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138724 states to 138724 states and 551532 transitions. [2023-12-02 13:53:57,472 INFO L78 Accepts]: Start accepts. Automaton has 138724 states and 551532 transitions. Word has length 3 [2023-12-02 13:53:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:53:57,472 INFO L495 AbstractCegarLoop]: Abstraction has 138724 states and 551532 transitions. [2023-12-02 13:53:57,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:53:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 138724 states and 551532 transitions. [2023-12-02 13:53:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 13:53:57,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:57,476 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-12-02 13:53:57,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:53:57,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 13:53:57,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1289968482, now seen corresponding path program 1 times [2023-12-02 13:53:57,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:57,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844996690] [2023-12-02 13:53:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:57,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:53:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:53:57,499 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 13:53:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:53:57,520 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 13:53:57,520 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 13:53:57,520 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2023-12-02 13:53:57,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (14 of 16 remaining) [2023-12-02 13:53:57,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2023-12-02 13:53:57,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (12 of 16 remaining) [2023-12-02 13:53:57,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-12-02 13:53:57,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-12-02 13:53:57,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-12-02 13:53:57,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (8 of 16 remaining) [2023-12-02 13:53:57,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 16 remaining) [2023-12-02 13:53:57,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (6 of 16 remaining) [2023-12-02 13:53:57,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (5 of 16 remaining) [2023-12-02 13:53:57,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (4 of 16 remaining) [2023-12-02 13:53:57,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (3 of 16 remaining) [2023-12-02 13:53:57,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (2 of 16 remaining) [2023-12-02 13:53:57,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (1 of 16 remaining) [2023-12-02 13:53:57,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (0 of 16 remaining) [2023-12-02 13:53:57,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:53:57,525 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 13:53:57,525 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 13:53:57,525 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-02 13:53:57,615 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 13:53:57,619 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 139 places, 146 transitions, 320 flow