./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe019_rmo.opt.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_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/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_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe019_rmo.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/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_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/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 2ad190c36ab064f1e4bfbebf06775e6b037058a5a86becabf7b70897d3619304 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:42:41,860 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:42:41,920 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 12:42:41,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:42:41,924 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:42:41,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:42:41,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:42:41,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:42:41,949 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:42:41,950 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:42:41,950 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:42:41,951 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:42:41,951 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:42:41,952 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:42:41,952 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:42:41,953 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:42:41,953 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:42:41,954 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:42:41,954 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:42:41,955 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:42:41,956 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:42:41,956 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:42:41,957 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:42:41,957 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:42:41,958 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:42:41,958 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:42:41,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:42:41,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:42:41,960 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:42:41,960 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:42:41,960 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:42:41,961 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:42:41,961 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:42:41,961 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:42:41,962 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:42:41,962 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:42:41,962 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:42:41,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:42:41,962 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:42:41,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:42:41,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:42:41,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:42:41,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:42:41,963 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:42:41,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:42:41,964 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:42:41,964 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:42:41,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:42:41,964 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_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ad190c36ab064f1e4bfbebf06775e6b037058a5a86becabf7b70897d3619304 [2023-12-02 12:42:42,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:42:42,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:42:42,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:42:42,202 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:42:42,202 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:42:42,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/pthread-wmm/safe019_rmo.opt.i [2023-12-02 12:42:44,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:42:45,136 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:42:45,137 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/sv-benchmarks/c/pthread-wmm/safe019_rmo.opt.i [2023-12-02 12:42:45,153 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/data/8a3aca81b/b3e1c050b9624d8289bece9192729974/FLAG426a5d646 [2023-12-02 12:42:45,167 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/data/8a3aca81b/b3e1c050b9624d8289bece9192729974 [2023-12-02 12:42:45,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:42:45,171 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:42:45,172 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:42:45,173 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:42:45,178 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:42:45,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a701c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45, skipping insertion in model container [2023-12-02 12:42:45,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,232 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:42:45,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:42:45,608 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:42:45,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:42:45,703 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:45,703 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:45,711 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:42:45,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45 WrapperNode [2023-12-02 12:42:45,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:42:45,713 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:42:45,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:42:45,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:42:45,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,740 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,766 INFO L138 Inliner]: procedures = 177, calls = 87, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 154 [2023-12-02 12:42:45,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:42:45,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:42:45,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:42:45,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:42:45,777 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,782 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,783 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,795 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,798 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,801 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,804 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,809 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:42:45,810 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:42:45,810 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:42:45,810 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:42:45,811 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (1/1) ... [2023-12-02 12:42:45,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:42:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:45,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:42:45,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69f1f60-1ad7-4151-9014-53f4a8f89fe8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:42:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 12:42:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:42:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 12:42:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:42:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 12:42:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:42:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-12-02 12:42:45,879 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-12-02 12:42:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-12-02 12:42:45,879 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-12-02 12:42:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-12-02 12:42:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-12-02 12:42:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-12-02 12:42:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-12-02 12:42:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:42:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 12:42:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:42:45,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:42:45,883 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 12:42:46,044 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:42:46,047 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:42:46,574 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:42:47,005 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:42:47,006 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 12:42:47,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:42:47 BoogieIcfgContainer [2023-12-02 12:42:47,007 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:42:47,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:42:47,009 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:42:47,011 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:42:47,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:42:45" (1/3) ... [2023-12-02 12:42:47,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39346768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:42:47, skipping insertion in model container [2023-12-02 12:42:47,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:45" (2/3) ... [2023-12-02 12:42:47,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39346768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:42:47, skipping insertion in model container [2023-12-02 12:42:47,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:42:47" (3/3) ... [2023-12-02 12:42:47,014 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_rmo.opt.i [2023-12-02 12:42:47,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:42:47,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 54 error locations. [2023-12-02 12:42:47,030 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 12:42:47,148 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 12:42:47,173 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 117 places, 106 transitions, 228 flow [2023-12-02 12:43:17,233 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1128592 states, 1055674 states have (on average 5.071637645712597) internal successors, (5353996), 1128591 states have internal predecessors, (5353996), 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 12:43:17,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:43:17,260 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;@7896176b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:43:17,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 96 error locations. [2023-12-02 12:43:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 1128592 states, 1055674 states have (on average 5.071637645712597) internal successors, (5353996), 1128591 states have internal predecessors, (5353996), 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 12:43:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 12:43:22,594 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:22,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 12:43:22,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-12-02 12:43:22,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash 26832, now seen corresponding path program 1 times [2023-12-02 12:43:22,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:22,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469753095] [2023-12-02 12:43:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:22,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:22,844 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 12:43:22,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:22,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469753095] [2023-12-02 12:43:22,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469753095] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:22,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:22,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:43:22,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597803925] [2023-12-02 12:43:22,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:22,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:22,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:24,759 INFO L87 Difference]: Start difference. First operand has 1128592 states, 1055674 states have (on average 5.071637645712597) internal successors, (5353996), 1128591 states have internal predecessors, (5353996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:29,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:29,938 INFO L93 Difference]: Finished difference Result 288301 states and 1312919 transitions. [2023-12-02 12:43:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:29,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-12-02 12:43:29,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:32,685 INFO L225 Difference]: With dead ends: 288301 [2023-12-02 12:43:32,685 INFO L226 Difference]: Without dead ends: 288301 [2023-12-02 12:43:32,687 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 12:43:32,690 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:32,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 32 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:43:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288301 states. [2023-12-02 12:43:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288301 to 288301. [2023-12-02 12:43:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288301 states, 281344 states have (on average 4.666596764103731) internal successors, (1312919), 288300 states have internal predecessors, (1312919), 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 12:43:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288301 states to 288301 states and 1312919 transitions. [2023-12-02 12:43:44,398 INFO L78 Accepts]: Start accepts. Automaton has 288301 states and 1312919 transitions. Word has length 2 [2023-12-02 12:43:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:44,398 INFO L495 AbstractCegarLoop]: Abstraction has 288301 states and 1312919 transitions. [2023-12-02 12:43:44,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 288301 states and 1312919 transitions. [2023-12-02 12:43:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 12:43:44,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:44,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 12:43:44,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:43:44,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-12-02 12:43:44,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:44,401 INFO L85 PathProgramCache]: Analyzing trace with hash 26833, now seen corresponding path program 1 times [2023-12-02 12:43:44,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:44,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138046534] [2023-12-02 12:43:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:44,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:44,503 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 12:43:44,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:44,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138046534] [2023-12-02 12:43:44,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138046534] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:44,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:44,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:43:44,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319556284] [2023-12-02 12:43:44,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:44,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:44,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:44,507 INFO L87 Difference]: Start difference. First operand 288301 states and 1312919 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:47,793 INFO L93 Difference]: Finished difference Result 288300 states and 1312918 transitions. [2023-12-02 12:43:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:47,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-12-02 12:43:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:50,214 INFO L225 Difference]: With dead ends: 288300 [2023-12-02 12:43:50,214 INFO L226 Difference]: Without dead ends: 288300 [2023-12-02 12:43:50,214 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 12:43:50,215 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:50,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:43:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288300 states. [2023-12-02 12:43:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288300 to 288300. [2023-12-02 12:43:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288300 states, 281344 states have (on average 4.666593209736123) internal successors, (1312918), 288299 states have internal predecessors, (1312918), 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 12:44:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288300 states to 288300 states and 1312918 transitions. [2023-12-02 12:44:01,540 INFO L78 Accepts]: Start accepts. Automaton has 288300 states and 1312918 transitions. Word has length 2 [2023-12-02 12:44:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:01,540 INFO L495 AbstractCegarLoop]: Abstraction has 288300 states and 1312918 transitions. [2023-12-02 12:44:01,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 288300 states and 1312918 transitions. [2023-12-02 12:44:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 12:44:01,541 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:01,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 12:44:01,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:44:01,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-12-02 12:44:01,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash 800277307, now seen corresponding path program 1 times [2023-12-02 12:44:01,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:01,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879781057] [2023-12-02 12:44:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:01,605 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 12:44:01,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:01,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879781057] [2023-12-02 12:44:01,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879781057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:01,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:01,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:44:01,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392206390] [2023-12-02 12:44:01,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:01,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:01,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:01,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:01,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:01,609 INFO L87 Difference]: Start difference. First operand 288300 states and 1312918 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 12:44:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:04,806 INFO L93 Difference]: Finished difference Result 288291 states and 1312901 transitions. [2023-12-02 12:44:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:04,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2023-12-02 12:44:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:07,385 INFO L225 Difference]: With dead ends: 288291 [2023-12-02 12:44:07,386 INFO L226 Difference]: Without dead ends: 288291 [2023-12-02 12:44:07,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:07,387 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:07,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 36 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288291 states. [2023-12-02 12:44:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288291 to 288291. [2023-12-02 12:44:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288291 states, 281338 states have (on average 4.666632307047039) internal successors, (1312901), 288290 states have internal predecessors, (1312901), 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 12:44:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288291 states to 288291 states and 1312901 transitions. [2023-12-02 12:44:17,939 INFO L78 Accepts]: Start accepts. Automaton has 288291 states and 1312901 transitions. Word has length 5 [2023-12-02 12:44:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:17,939 INFO L495 AbstractCegarLoop]: Abstraction has 288291 states and 1312901 transitions. [2023-12-02 12:44:17,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 12:44:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 288291 states and 1312901 transitions. [2023-12-02 12:44:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 12:44:17,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:17,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 12:44:17,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:44:17,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-12-02 12:44:17,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash 800277308, now seen corresponding path program 1 times [2023-12-02 12:44:17,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:17,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901929781] [2023-12-02 12:44:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:17,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat