./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longest-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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/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_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longest-1-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/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_2b938080-dba3-400c-9c4c-7bd50a972f3c/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 3e10ed02255b37a861fcd919e1a26aad90b67620d926f632b070967147a10b69 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:45:43,795 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:45:43,860 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 19:45:43,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:45:43,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:45:43,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:45:43,890 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:45:43,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:45:43,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:45:43,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:45:43,893 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:45:43,893 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:45:43,894 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:45:43,894 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:45:43,895 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:45:43,895 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:45:43,896 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:45:43,896 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:45:43,897 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:45:43,897 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:45:43,898 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:45:43,898 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:45:43,899 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 19:45:43,899 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 19:45:43,900 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:45:43,900 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:45:43,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:45:43,901 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:45:43,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:45:43,902 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 19:45:43,902 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 19:45:43,903 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 19:45:43,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:45:43,903 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 19:45:43,904 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 19:45:43,904 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:45:43,904 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:45:43,904 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:45:43,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:45:43,905 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:45:43,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:45:43,905 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:45:43,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:45:43,906 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:45:43,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:45:43,906 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:45:43,906 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:45:43,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:45:43,907 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_2b938080-dba3-400c-9c4c-7bd50a972f3c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e10ed02255b37a861fcd919e1a26aad90b67620d926f632b070967147a10b69 [2023-12-02 19:45:44,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:45:44,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:45:44,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:45:44,145 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:45:44,145 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:45:44,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/pthread-ext/25_stack_longest-1-pthread.i [2023-12-02 19:45:46,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:45:47,152 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:45:47,153 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/sv-benchmarks/c/pthread-ext/25_stack_longest-1-pthread.i [2023-12-02 19:45:47,168 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/data/95581bdc6/51e5dd5731ef43f9b4d35aa5118b3a9f/FLAG5cab034e3 [2023-12-02 19:45:47,183 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/data/95581bdc6/51e5dd5731ef43f9b4d35aa5118b3a9f [2023-12-02 19:45:47,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:45:47,187 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:45:47,188 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:45:47,188 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:45:47,193 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:45:47,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,195 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1965a80a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47, skipping insertion in model container [2023-12-02 19:45:47,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,245 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:45:47,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:45:47,601 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:45:47,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:45:47,674 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:45:47,675 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:45:47,682 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:45:47,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47 WrapperNode [2023-12-02 19:45:47,683 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:45:47,684 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:45:47,684 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:45:47,685 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:45:47,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,732 INFO L138 Inliner]: procedures = 172, calls = 39, calls flagged for inlining = 10, calls inlined = 9, statements flattened = 138 [2023-12-02 19:45:47,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:45:47,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:45:47,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:45:47,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:45:47,742 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,747 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,754 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,761 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,762 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:45:47,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:45:47,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:45:47,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:45:47,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (1/1) ... [2023-12-02 19:45:47,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:45:47,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:45:47,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:45:47,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b938080-dba3-400c-9c4c-7bd50a972f3c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:45:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-02 19:45:47,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-02 19:45:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:45:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-02 19:45:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 19:45:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:45:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:45:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:45:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:45:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 19:45:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-02 19:45:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:45:47,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:45:47,834 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 19:45:47,965 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:45:47,967 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:45:48,194 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:45:48,356 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:45:48,357 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 19:45:48,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:45:48 BoogieIcfgContainer [2023-12-02 19:45:48,357 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:45:48,360 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:45:48,360 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:45:48,363 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:45:48,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:45:47" (1/3) ... [2023-12-02 19:45:48,364 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54634524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:45:48, skipping insertion in model container [2023-12-02 19:45:48,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:45:47" (2/3) ... [2023-12-02 19:45:48,364 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54634524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:45:48, skipping insertion in model container [2023-12-02 19:45:48,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:45:48" (3/3) ... [2023-12-02 19:45:48,366 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-1-pthread.i [2023-12-02 19:45:48,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:45:48,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-12-02 19:45:48,381 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 19:45:48,437 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 19:45:48,462 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 44 transitions, 92 flow [2023-12-02 19:45:48,504 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 19:45:48,520 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:45:48,527 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;@606092d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:45:48,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-12-02 19:45:48,530 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 19:45:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:45:48,537 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:48,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:45:48,538 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 19:45:48,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash 408259, now seen corresponding path program 1 times [2023-12-02 19:45:48,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:48,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797402372] [2023-12-02 19:45:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:48,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:48,776 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 19:45:48,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:45:48,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797402372] [2023-12-02 19:45:48,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797402372] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:45:48,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:45:48,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:45:48,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001285845] [2023-12-02 19:45:48,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:45:48,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:45:48,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:45:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:45:48,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:45:48,812 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 19:45:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:45:48,908 INFO L93 Difference]: Finished difference Result 185 states and 347 transitions. [2023-12-02 19:45:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:45:48,911 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 19:45:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:45:48,921 INFO L225 Difference]: With dead ends: 185 [2023-12-02 19:45:48,922 INFO L226 Difference]: Without dead ends: 185 [2023-12-02 19:45:48,923 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 19:45:48,927 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 19:45:48,928 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 19:45:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-02 19:45:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-12-02 19:45:48,987 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 19:45:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 347 transitions. [2023-12-02 19:45:48,992 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 347 transitions. Word has length 3 [2023-12-02 19:45:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:45:48,992 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 347 transitions. [2023-12-02 19:45:48,993 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 19:45:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 347 transitions. [2023-12-02 19:45:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:45:48,993 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:48,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:45:48,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:45:48,994 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 19:45:48,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:48,995 INFO L85 PathProgramCache]: Analyzing trace with hash 408260, now seen corresponding path program 1 times [2023-12-02 19:45:48,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:48,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406095432] [2023-12-02 19:45:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:48,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:49,108 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 19:45:49,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:45:49,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406095432] [2023-12-02 19:45:49,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406095432] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:45:49,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:45:49,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:45:49,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616247768] [2023-12-02 19:45:49,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:45:49,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:45:49,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:45:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:45:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:45:49,112 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 19:45:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:45:49,160 INFO L93 Difference]: Finished difference Result 154 states and 284 transitions. [2023-12-02 19:45:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:45:49,161 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 19:45:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:45:49,163 INFO L225 Difference]: With dead ends: 154 [2023-12-02 19:45:49,163 INFO L226 Difference]: Without dead ends: 154 [2023-12-02 19:45:49,163 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 19:45:49,165 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 19:45:49,166 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 19:45:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-02 19:45:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-12-02 19:45:49,177 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 19:45:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 284 transitions. [2023-12-02 19:45:49,179 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 284 transitions. Word has length 3 [2023-12-02 19:45:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:45:49,180 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 284 transitions. [2023-12-02 19:45:49,180 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 19:45:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 284 transitions. [2023-12-02 19:45:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 19:45:49,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:49,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-12-02 19:45:49,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:45:49,182 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 19:45:49,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1874988019, now seen corresponding path program 1 times [2023-12-02 19:45:49,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:49,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600749747] [2023-12-02 19:45:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:49,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:45:49,206 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 19:45:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:45:49,242 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 19:45:49,242 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 19:45:49,243 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-12-02 19:45:49,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (8 of 10 remaining) [2023-12-02 19:45:49,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2023-12-02 19:45:49,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (6 of 10 remaining) [2023-12-02 19:45:49,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-12-02 19:45:49,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-12-02 19:45:49,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-12-02 19:45:49,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (2 of 10 remaining) [2023-12-02 19:45:49,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-12-02 19:45:49,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (0 of 10 remaining) [2023-12-02 19:45:49,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:45:49,251 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 19:45:49,253 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 19:45:49,253 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 19:45:49,304 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 19:45:49,307 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 75 places, 78 transitions, 166 flow [2023-12-02 19:45:49,568 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 19:45:49,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:45:49,570 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;@606092d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:45:49,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-12-02 19:45:49,593 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 19:45:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:45:49,594 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:49,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:45:49,595 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 19:45:49,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash 485713, now seen corresponding path program 1 times [2023-12-02 19:45:49,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:49,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626241322] [2023-12-02 19:45:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:49,635 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 19:45:49,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:45:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626241322] [2023-12-02 19:45:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626241322] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:45:49,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:45:49,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:45:49,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728941164] [2023-12-02 19:45:49,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:45:49,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:45:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:45:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:45:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:45:49,655 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 19:45:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:45:49,791 INFO L93 Difference]: Finished difference Result 5555 states and 16335 transitions. [2023-12-02 19:45:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:45:49,792 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 19:45:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:45:49,838 INFO L225 Difference]: With dead ends: 5555 [2023-12-02 19:45:49,839 INFO L226 Difference]: Without dead ends: 5555 [2023-12-02 19:45:49,839 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 19:45:49,840 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 19:45:49,841 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 19:45:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5555 states. [2023-12-02 19:45:50,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5555 to 5555. [2023-12-02 19:45:50,028 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 19:45:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5555 states to 5555 states and 16335 transitions. [2023-12-02 19:45:50,052 INFO L78 Accepts]: Start accepts. Automaton has 5555 states and 16335 transitions. Word has length 3 [2023-12-02 19:45:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:45:50,052 INFO L495 AbstractCegarLoop]: Abstraction has 5555 states and 16335 transitions. [2023-12-02 19:45:50,053 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 19:45:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5555 states and 16335 transitions. [2023-12-02 19:45:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:45:50,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:50,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:45:50,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:45:50,054 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 19:45:50,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash 485714, now seen corresponding path program 1 times [2023-12-02 19:45:50,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:50,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565482582] [2023-12-02 19:45:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:50,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:50,109 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 19:45:50,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:45:50,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565482582] [2023-12-02 19:45:50,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565482582] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:45:50,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:45:50,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:45:50,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852816433] [2023-12-02 19:45:50,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:45:50,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:45:50,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:45:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:45:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:45:50,111 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 19:45:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:45:50,245 INFO L93 Difference]: Finished difference Result 4624 states and 13452 transitions. [2023-12-02 19:45:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:45:50,246 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 19:45:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:45:50,285 INFO L225 Difference]: With dead ends: 4624 [2023-12-02 19:45:50,286 INFO L226 Difference]: Without dead ends: 4624 [2023-12-02 19:45:50,286 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 19:45:50,287 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 19:45:50,287 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 19:45:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2023-12-02 19:45:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 4624. [2023-12-02 19:45:50,449 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 19:45:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 13452 transitions. [2023-12-02 19:45:50,474 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 13452 transitions. Word has length 3 [2023-12-02 19:45:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:45:50,474 INFO L495 AbstractCegarLoop]: Abstraction has 4624 states and 13452 transitions. [2023-12-02 19:45:50,474 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 19:45:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 13452 transitions. [2023-12-02 19:45:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 19:45:50,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:50,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-12-02 19:45:50,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:45:50,476 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 9 more)] === [2023-12-02 19:45:50,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash 635840935, now seen corresponding path program 1 times [2023-12-02 19:45:50,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:50,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146635915] [2023-12-02 19:45:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:50,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:45:50,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 19:45:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:45:50,515 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 19:45:50,516 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 19:45:50,516 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-12-02 19:45:50,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (11 of 13 remaining) [2023-12-02 19:45:50,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (10 of 13 remaining) [2023-12-02 19:45:50,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (9 of 13 remaining) [2023-12-02 19:45:50,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-12-02 19:45:50,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-12-02 19:45:50,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-12-02 19:45:50,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (5 of 13 remaining) [2023-12-02 19:45:50,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (4 of 13 remaining) [2023-12-02 19:45:50,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (3 of 13 remaining) [2023-12-02 19:45:50,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (2 of 13 remaining) [2023-12-02 19:45:50,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (1 of 13 remaining) [2023-12-02 19:45:50,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (0 of 13 remaining) [2023-12-02 19:45:50,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:45:50,519 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 19:45:50,519 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 19:45:50,519 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 19:45:50,583 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 19:45:50,586 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 107 places, 112 transitions, 242 flow [2023-12-02 19:45:58,049 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 19:45:58,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:45:58,050 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;@606092d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:45:58,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-12-02 19:45:58,410 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 19:45:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:45:58,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:58,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:45:58,411 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 19:45:58,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash 596929, now seen corresponding path program 1 times [2023-12-02 19:45:58,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:58,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622970204] [2023-12-02 19:45:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:58,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:58,444 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 19:45:58,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:45:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622970204] [2023-12-02 19:45:58,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622970204] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:45:58,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:45:58,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:45:58,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184009853] [2023-12-02 19:45:58,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:45:58,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:45:58,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:45:58,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:45:58,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:45:58,803 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 19:46:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:46:01,245 INFO L93 Difference]: Finished difference Result 166655 states and 667815 transitions. [2023-12-02 19:46:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:46:01,246 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 19:46:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:46:02,544 INFO L225 Difference]: With dead ends: 166655 [2023-12-02 19:46:02,544 INFO L226 Difference]: Without dead ends: 166655 [2023-12-02 19:46:02,545 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 19:46:02,546 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:46:02,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 31 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:46:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166655 states. [2023-12-02 19:46:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166655 to 166655. [2023-12-02 19:46:07,684 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 19:46:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166655 states to 166655 states and 667815 transitions. [2023-12-02 19:46:08,940 INFO L78 Accepts]: Start accepts. Automaton has 166655 states and 667815 transitions. Word has length 3 [2023-12-02 19:46:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:46:08,940 INFO L495 AbstractCegarLoop]: Abstraction has 166655 states and 667815 transitions. [2023-12-02 19:46:08,940 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 19:46:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 166655 states and 667815 transitions. [2023-12-02 19:46:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:46:08,940 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:46:08,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:46:08,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:46:08,941 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 19:46:08,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:46:08,941 INFO L85 PathProgramCache]: Analyzing trace with hash 596930, now seen corresponding path program 1 times [2023-12-02 19:46:08,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:46:08,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363133303] [2023-12-02 19:46:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:46:08,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:46:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:46:08,981 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 19:46:08,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:46:08,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363133303] [2023-12-02 19:46:08,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363133303] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:46:08,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:46:08,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:46:08,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362759517] [2023-12-02 19:46:08,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:46:08,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:46:08,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:46:08,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:46:08,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:46:08,984 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 19:46:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:46:10,403 INFO L93 Difference]: Finished difference Result 138724 states and 551532 transitions. [2023-12-02 19:46:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:46:10,404 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 19:46:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:46:11,489 INFO L225 Difference]: With dead ends: 138724 [2023-12-02 19:46:11,489 INFO L226 Difference]: Without dead ends: 138724 [2023-12-02 19:46:11,489 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 19:46:11,490 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 19:46:11,490 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 19:46:11,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138724 states. [2023-12-02 19:46:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138724 to 138724. [2023-12-02 19:46:15,171 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 19:46:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138724 states to 138724 states and 551532 transitions. [2023-12-02 19:46:16,182 INFO L78 Accepts]: Start accepts. Automaton has 138724 states and 551532 transitions. Word has length 3 [2023-12-02 19:46:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:46:16,182 INFO L495 AbstractCegarLoop]: Abstraction has 138724 states and 551532 transitions. [2023-12-02 19:46:16,183 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 19:46:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 138724 states and 551532 transitions. [2023-12-02 19:46:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 19:46:16,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:46:16,186 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-12-02 19:46:16,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:46:16,187 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 19:46:16,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:46:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1289968482, now seen corresponding path program 1 times [2023-12-02 19:46:16,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:46:16,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289303107] [2023-12-02 19:46:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:46:16,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:46:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:46:16,204 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 19:46:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:46:16,220 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 19:46:16,220 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 19:46:16,221 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2023-12-02 19:46:16,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (14 of 16 remaining) [2023-12-02 19:46:16,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2023-12-02 19:46:16,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (12 of 16 remaining) [2023-12-02 19:46:16,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-12-02 19:46:16,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-12-02 19:46:16,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-12-02 19:46:16,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (8 of 16 remaining) [2023-12-02 19:46:16,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 16 remaining) [2023-12-02 19:46:16,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (6 of 16 remaining) [2023-12-02 19:46:16,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (5 of 16 remaining) [2023-12-02 19:46:16,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (4 of 16 remaining) [2023-12-02 19:46:16,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (3 of 16 remaining) [2023-12-02 19:46:16,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (2 of 16 remaining) [2023-12-02 19:46:16,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (1 of 16 remaining) [2023-12-02 19:46:16,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (0 of 16 remaining) [2023-12-02 19:46:16,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 19:46:16,224 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 19:46:16,224 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 19:46:16,225 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-02 19:46:16,299 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 19:46:16,302 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 139 places, 146 transitions, 320 flow