./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrspn_reverse_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrspn_reverse_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5874eb83dea617c97f28746e1359ec67eb979d702b31dfbd0eb177fa26bd5d73 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 13:57:44,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:57:44,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:57:44,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:57:44,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:57:44,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:57:44,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:57:44,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:57:44,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:57:44,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:57:44,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:57:44,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:57:44,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:57:44,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:57:44,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:57:44,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:57:44,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:57:44,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:57:44,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:57:44,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:57:44,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:57:44,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:57:44,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:57:44,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:57:44,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:57:44,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:57:44,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:57:44,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:57:44,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:57:44,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:57:44,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:57:44,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:57:44,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:57:44,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:57:44,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:57:44,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:57:44,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:57:44,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:57:44,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:57:44,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:57:44,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:57:44,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-21 13:57:44,343 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:57:44,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:57:44,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:57:44,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:57:44,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:57:44,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:57:44,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:57:44,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:57:44,347 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:57:44,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:57:44,348 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 13:57:44,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:57:44,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:57:44,348 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 13:57:44,349 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 13:57:44,349 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 13:57:44,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:57:44,349 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 13:57:44,350 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:57:44,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:57:44,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:57:44,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:57:44,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:57:44,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:57:44,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:57:44,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:57:44,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:57:44,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5874eb83dea617c97f28746e1359ec67eb979d702b31dfbd0eb177fa26bd5d73 [2022-11-21 13:57:44,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:57:44,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:57:44,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:57:44,702 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:57:44,702 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:57:44,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/termination-15/cstrspn_reverse_alloca.i [2022-11-21 13:57:48,626 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:57:48,916 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:57:48,917 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/sv-benchmarks/c/termination-15/cstrspn_reverse_alloca.i [2022-11-21 13:57:48,931 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/data/e1781aec0/8ad2a780c69646debec4f5f17235c175/FLAGc243e3e9e [2022-11-21 13:57:48,950 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/data/e1781aec0/8ad2a780c69646debec4f5f17235c175 [2022-11-21 13:57:48,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:57:48,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:57:48,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:57:48,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:57:48,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:57:48,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:57:48" (1/1) ... [2022-11-21 13:57:48,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6284f6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:48, skipping insertion in model container [2022-11-21 13:57:48,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:57:48" (1/1) ... [2022-11-21 13:57:48,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:57:49,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:57:49,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:57:49,507 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:57:49,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:57:49,624 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:57:49,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49 WrapperNode [2022-11-21 13:57:49,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:57:49,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:57:49,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:57:49,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:57:49,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,709 INFO L138 Inliner]: procedures = 152, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-11-21 13:57:49,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:57:49,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:57:49,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:57:49,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:57:49,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,764 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:57:49,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:57:49,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:57:49,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:57:49,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (1/1) ... [2022-11-21 13:57:49,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:57:49,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:49,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:57:49,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:57:49,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:57:49,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:57:49,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:57:49,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:57:49,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:57:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:57:50,008 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:57:50,010 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:57:50,419 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:57:50,427 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:57:50,428 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 13:57:50,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:50 BoogieIcfgContainer [2022-11-21 13:57:50,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:57:50,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:57:50,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:57:50,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:57:50,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:57:48" (1/3) ... [2022-11-21 13:57:50,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7795a592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:50, skipping insertion in model container [2022-11-21 13:57:50,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:49" (2/3) ... [2022-11-21 13:57:50,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7795a592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:50, skipping insertion in model container [2022-11-21 13:57:50,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:50" (3/3) ... [2022-11-21 13:57:50,455 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrspn_reverse_alloca.i [2022-11-21 13:57:50,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:57:50,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-21 13:57:50,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:57:50,546 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;@3ec6a44e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:57:50,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-21 13:57:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 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) [2022-11-21 13:57:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 13:57:50,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:50,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 13:57:50,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:50,571 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2022-11-21 13:57:50,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:50,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3702364] [2022-11-21 13:57:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:50,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:51,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3702364] [2022-11-21 13:57:51,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3702364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:51,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:51,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:57:51,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997047914] [2022-11-21 13:57:51,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:51,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:51,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:51,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:51,108 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 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 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-21 13:57:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:51,183 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-21 13:57:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:51,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-21 13:57:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:51,204 INFO L225 Difference]: With dead ends: 40 [2022-11-21 13:57:51,214 INFO L226 Difference]: Without dead ends: 38 [2022-11-21 13:57:51,217 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 [2022-11-21 13:57:51,222 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:51,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 34 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-21 13:57:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-21 13:57:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 37 states have internal predecessors, (43), 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) [2022-11-21 13:57:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-21 13:57:51,275 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2022-11-21 13:57:51,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:51,276 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-21 13:57:51,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-21 13:57:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-21 13:57:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 13:57:51,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:51,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 13:57:51,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:57:51,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2022-11-21 13:57:51,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:51,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497709924] [2022-11-21 13:57:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:51,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:51,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497709924] [2022-11-21 13:57:51,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497709924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:51,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:51,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:51,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457562380] [2022-11-21 13:57:51,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:51,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:57:51,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:57:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:57:51,701 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-21 13:57:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:51,857 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-11-21 13:57:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:57:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-11-21 13:57:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:51,862 INFO L225 Difference]: With dead ends: 72 [2022-11-21 13:57:51,865 INFO L226 Difference]: Without dead ends: 72 [2022-11-21 13:57:51,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:57:51,867 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 41 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:51,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 102 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-21 13:57:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 41. [2022-11-21 13:57:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 40 states have internal predecessors, (47), 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) [2022-11-21 13:57:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-21 13:57:51,882 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 6 [2022-11-21 13:57:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:51,883 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-21 13:57:51,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-21 13:57:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-21 13:57:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 13:57:51,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:51,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 13:57:51,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:57:51,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2022-11-21 13:57:51,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:51,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158559702] [2022-11-21 13:57:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:52,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158559702] [2022-11-21 13:57:52,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158559702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:52,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:52,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:57:52,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614620384] [2022-11-21 13:57:52,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:52,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:57:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:57:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:57:52,145 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-11-21 13:57:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:52,214 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-21 13:57:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:57:52,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2022-11-21 13:57:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:52,216 INFO L225 Difference]: With dead ends: 40 [2022-11-21 13:57:52,216 INFO L226 Difference]: Without dead ends: 40 [2022-11-21 13:57:52,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:52,218 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:52,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 60 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-21 13:57:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-11-21 13:57:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.75) internal successors, (42), 36 states have internal predecessors, (42), 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) [2022-11-21 13:57:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-21 13:57:52,225 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 6 [2022-11-21 13:57:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:52,226 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-21 13:57:52,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-11-21 13:57:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-21 13:57:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 13:57:52,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:52,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:52,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 13:57:52,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:52,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028874, now seen corresponding path program 1 times [2022-11-21 13:57:52,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:52,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299924782] [2022-11-21 13:57:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:52,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:52,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:52,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299924782] [2022-11-21 13:57:52,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299924782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:52,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:52,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:57:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271686970] [2022-11-21 13:57:52,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:52,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:52,286 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:52,339 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-11-21 13:57:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:52,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 13:57:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:52,342 INFO L225 Difference]: With dead ends: 36 [2022-11-21 13:57:52,343 INFO L226 Difference]: Without dead ends: 36 [2022-11-21 13:57:52,343 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 [2022-11-21 13:57:52,345 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:52,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 30 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-21 13:57:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-21 13:57:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 35 states have internal predecessors, (41), 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) [2022-11-21 13:57:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-21 13:57:52,352 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 7 [2022-11-21 13:57:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:52,353 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-21 13:57:52,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-21 13:57:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 13:57:52,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:52,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:52,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 13:57:52,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:52,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028875, now seen corresponding path program 1 times [2022-11-21 13:57:52,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:52,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463677703] [2022-11-21 13:57:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:52,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:52,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463677703] [2022-11-21 13:57:52,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463677703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:52,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:52,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:52,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601161395] [2022-11-21 13:57:52,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:52,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:57:52,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:52,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:57:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:57:52,503 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:52,562 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-11-21 13:57:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:57:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 13:57:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:52,564 INFO L225 Difference]: With dead ends: 67 [2022-11-21 13:57:52,564 INFO L226 Difference]: Without dead ends: 67 [2022-11-21 13:57:52,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:57:52,566 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:52,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 98 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-21 13:57:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-11-21 13:57:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 38 states have internal predecessors, (44), 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) [2022-11-21 13:57:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-21 13:57:52,572 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 7 [2022-11-21 13:57:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:52,573 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-21 13:57:52,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-21 13:57:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 13:57:52,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:52,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:52,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 13:57:52,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:52,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1805088457, now seen corresponding path program 1 times [2022-11-21 13:57:52,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:52,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775625044] [2022-11-21 13:57:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:52,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:52,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:52,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775625044] [2022-11-21 13:57:52,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775625044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:52,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:52,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:57:52,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540361146] [2022-11-21 13:57:52,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:52,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:57:52,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:52,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:57:52,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:57:52,702 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:52,761 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-21 13:57:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:57:52,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 13:57:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:52,763 INFO L225 Difference]: With dead ends: 38 [2022-11-21 13:57:52,764 INFO L226 Difference]: Without dead ends: 38 [2022-11-21 13:57:52,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:52,766 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:52,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 61 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-21 13:57:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-11-21 13:57:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 34 states have internal predecessors, (40), 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) [2022-11-21 13:57:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-21 13:57:52,780 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 7 [2022-11-21 13:57:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:52,781 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-21 13:57:52,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-21 13:57:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 13:57:52,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:52,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:52,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 13:57:52,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -534039922, now seen corresponding path program 1 times [2022-11-21 13:57:52,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:52,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862423454] [2022-11-21 13:57:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:52,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:52,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:52,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862423454] [2022-11-21 13:57:52,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862423454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:52,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:52,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:52,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975653258] [2022-11-21 13:57:52,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:52,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:57:52,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:57:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:57:52,912 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:52,976 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-11-21 13:57:52,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:57:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-21 13:57:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:52,977 INFO L225 Difference]: With dead ends: 33 [2022-11-21 13:57:52,978 INFO L226 Difference]: Without dead ends: 33 [2022-11-21 13:57:52,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:57:52,983 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:52,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 31 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-21 13:57:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-21 13:57:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 32 states have internal predecessors, (38), 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) [2022-11-21 13:57:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-21 13:57:53,000 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 9 [2022-11-21 13:57:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:53,001 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-21 13:57:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-21 13:57:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 13:57:53,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:53,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:53,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 13:57:53,002 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash -534039921, now seen corresponding path program 1 times [2022-11-21 13:57:53,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:53,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461452444] [2022-11-21 13:57:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:53,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461452444] [2022-11-21 13:57:53,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461452444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:53,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:53,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:57:53,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087336155] [2022-11-21 13:57:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:53,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:57:53,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:57:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:53,265 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:53,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:53,460 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-11-21 13:57:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:57:53,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-21 13:57:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:53,465 INFO L225 Difference]: With dead ends: 62 [2022-11-21 13:57:53,466 INFO L226 Difference]: Without dead ends: 62 [2022-11-21 13:57:53,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:53,467 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 109 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:53,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 89 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-21 13:57:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 38. [2022-11-21 13:57:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 37 states have internal predecessors, (44), 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) [2022-11-21 13:57:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-21 13:57:53,472 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 9 [2022-11-21 13:57:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:53,473 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-21 13:57:53,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-21 13:57:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 13:57:53,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:53,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:53,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 13:57:53,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1240967441, now seen corresponding path program 1 times [2022-11-21 13:57:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:53,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202338706] [2022-11-21 13:57:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:53,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:53,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202338706] [2022-11-21 13:57:53,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202338706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:53,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:53,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:57:53,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938546353] [2022-11-21 13:57:53,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:53,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:57:53,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:53,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:57:53,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:57:53,884 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:53,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:53,972 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-21 13:57:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:57:53,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-21 13:57:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:53,973 INFO L225 Difference]: With dead ends: 39 [2022-11-21 13:57:53,973 INFO L226 Difference]: Without dead ends: 39 [2022-11-21 13:57:53,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:53,975 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:53,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 44 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-21 13:57:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-21 13:57:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 32 states have internal predecessors, (38), 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) [2022-11-21 13:57:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-21 13:57:53,979 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 9 [2022-11-21 13:57:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:53,979 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-21 13:57:53,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-21 13:57:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 13:57:53,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:53,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:53,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 13:57:53,981 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144940, now seen corresponding path program 1 times [2022-11-21 13:57:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:53,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696525306] [2022-11-21 13:57:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:54,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:54,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696525306] [2022-11-21 13:57:54,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696525306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:54,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:54,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:57:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840331098] [2022-11-21 13:57:54,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:54,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:57:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:57:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:57:54,071 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-11-21 13:57:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:54,148 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-21 13:57:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:57:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2022-11-21 13:57:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:54,150 INFO L225 Difference]: With dead ends: 33 [2022-11-21 13:57:54,150 INFO L226 Difference]: Without dead ends: 33 [2022-11-21 13:57:54,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:57:54,151 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:54,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 36 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-21 13:57:54,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-11-21 13:57:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 29 states have internal predecessors, (35), 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) [2022-11-21 13:57:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-21 13:57:54,167 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 13 [2022-11-21 13:57:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:54,168 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-21 13:57:54,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-11-21 13:57:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-21 13:57:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 13:57:54,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:54,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:54,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 13:57:54,170 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144939, now seen corresponding path program 1 times [2022-11-21 13:57:54,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:54,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003458672] [2022-11-21 13:57:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:54,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003458672] [2022-11-21 13:57:54,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003458672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:54,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:54,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:57:54,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380648019] [2022-11-21 13:57:54,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:54,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:57:54,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:57:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:57:54,508 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-11-21 13:57:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:54,721 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-11-21 13:57:54,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:57:54,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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 13 [2022-11-21 13:57:54,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:54,725 INFO L225 Difference]: With dead ends: 63 [2022-11-21 13:57:54,725 INFO L226 Difference]: Without dead ends: 63 [2022-11-21 13:57:54,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:57:54,726 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 130 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:54,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 108 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-21 13:57:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2022-11-21 13:57:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 46 states have internal predecessors, (58), 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) [2022-11-21 13:57:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-11-21 13:57:54,737 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 13 [2022-11-21 13:57:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:54,738 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-11-21 13:57:54,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-11-21 13:57:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-11-21 13:57:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 13:57:54,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:54,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:54,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 13:57:54,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:54,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1693161859, now seen corresponding path program 1 times [2022-11-21 13:57:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:54,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653304970] [2022-11-21 13:57:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:54,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:54,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:54,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653304970] [2022-11-21 13:57:54,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653304970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:54,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:54,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:54,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843358217] [2022-11-21 13:57:54,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:54,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:57:54,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:54,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:57:54,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:57:55,000 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-21 13:57:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:55,029 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-11-21 13:57:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:57:55,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-11-21 13:57:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:55,031 INFO L225 Difference]: With dead ends: 46 [2022-11-21 13:57:55,031 INFO L226 Difference]: Without dead ends: 43 [2022-11-21 13:57:55,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:57:55,032 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:55,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-21 13:57:55,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-21 13:57:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 42 states have internal predecessors, (51), 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) [2022-11-21 13:57:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-21 13:57:55,036 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 13 [2022-11-21 13:57:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:55,037 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-21 13:57:55,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-21 13:57:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-21 13:57:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 13:57:55,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:55,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 13:57:55,039 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2086171949, now seen corresponding path program 1 times [2022-11-21 13:57:55,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:55,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608729701] [2022-11-21 13:57:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:55,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:55,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:55,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608729701] [2022-11-21 13:57:55,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608729701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:55,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:55,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:57:55,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746538390] [2022-11-21 13:57:55,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:55,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:57:55,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:57:55,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:57:55,381 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-11-21 13:57:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:55,490 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-11-21 13:57:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:57:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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 13 [2022-11-21 13:57:55,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:55,491 INFO L225 Difference]: With dead ends: 46 [2022-11-21 13:57:55,491 INFO L226 Difference]: Without dead ends: 46 [2022-11-21 13:57:55,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:57:55,492 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:55,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 31 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-21 13:57:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 25. [2022-11-21 13:57:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 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) [2022-11-21 13:57:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-21 13:57:55,495 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2022-11-21 13:57:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:55,495 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-21 13:57:55,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-11-21 13:57:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-21 13:57:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 13:57:55,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:55,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:55,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 13:57:55,497 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:55,497 INFO L85 PathProgramCache]: Analyzing trace with hash 950889964, now seen corresponding path program 1 times [2022-11-21 13:57:55,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:55,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473373560] [2022-11-21 13:57:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:55,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:55,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473373560] [2022-11-21 13:57:55,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473373560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:55,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:55,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087581694] [2022-11-21 13:57:55,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:55,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:55,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:55,540 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-11-21 13:57:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:55,551 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-21 13:57:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:55,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2022-11-21 13:57:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:55,552 INFO L225 Difference]: With dead ends: 26 [2022-11-21 13:57:55,552 INFO L226 Difference]: Without dead ends: 26 [2022-11-21 13:57:55,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:55,555 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:55,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-21 13:57:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-21 13:57:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 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) [2022-11-21 13:57:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-21 13:57:55,565 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-11-21 13:57:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:55,567 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-21 13:57:55,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-11-21 13:57:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-21 13:57:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 13:57:55,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:55,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:55,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 13:57:55,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1028637879, now seen corresponding path program 1 times [2022-11-21 13:57:55,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:55,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713162053] [2022-11-21 13:57:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:55,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:56,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:56,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713162053] [2022-11-21 13:57:56,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713162053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:56,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:56,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 13:57:56,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133977399] [2022-11-21 13:57:56,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:56,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:57:56,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:56,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:57:56,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:57:56,017 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2022-11-21 13:57:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:56,272 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-11-21 13:57:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:57:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 19 [2022-11-21 13:57:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:56,273 INFO L225 Difference]: With dead ends: 44 [2022-11-21 13:57:56,274 INFO L226 Difference]: Without dead ends: 44 [2022-11-21 13:57:56,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:57:56,275 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:56,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 103 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-21 13:57:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-11-21 13:57:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 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) [2022-11-21 13:57:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-11-21 13:57:56,277 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 19 [2022-11-21 13:57:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:56,277 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-11-21 13:57:56,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2022-11-21 13:57:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-11-21 13:57:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 13:57:56,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:56,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:56,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 13:57:56,286 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2049706233, now seen corresponding path program 1 times [2022-11-21 13:57:56,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:56,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156738493] [2022-11-21 13:57:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:56,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:56,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156738493] [2022-11-21 13:57:56,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156738493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:56,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86688207] [2022-11-21 13:57:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:56,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:56,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:56,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:56,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:57:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:56,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-21 13:57:56,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:57,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 13:57:57,156 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-21 13:57:57,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-21 13:57:57,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 13:57:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:57:57,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:57,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86688207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:57,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:57:57,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2022-11-21 13:57:57,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032373847] [2022-11-21 13:57:57,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:57:57,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:57:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:57:57,280 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-11-21 13:57:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:57,372 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-11-21 13:57:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:57:57,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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 19 [2022-11-21 13:57:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:57,374 INFO L225 Difference]: With dead ends: 55 [2022-11-21 13:57:57,374 INFO L226 Difference]: Without dead ends: 42 [2022-11-21 13:57:57,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:57:57,375 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:57,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 87 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-21 13:57:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-21 13:57:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 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) [2022-11-21 13:57:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-11-21 13:57:57,378 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 19 [2022-11-21 13:57:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:57,378 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-11-21 13:57:57,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-11-21 13:57:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-11-21 13:57:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 13:57:57,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:57,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:57,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:57,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 13:57:57,587 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:57:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash 656913161, now seen corresponding path program 1 times [2022-11-21 13:57:57,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:57,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545628614] [2022-11-21 13:57:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:57,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:58,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:58,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545628614] [2022-11-21 13:57:58,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545628614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:58,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275648736] [2022-11-21 13:57:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:58,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:58,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:58,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:57:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 13:57:58,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:58,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 13:57:58,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:57:58,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-21 13:57:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:58,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:58,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-21 13:57:59,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 13:57:59,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-21 13:57:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:59,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275648736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:59,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:57:59,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-21 13:57:59,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301785379] [2022-11-21 13:57:59,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:59,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 13:57:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:59,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 13:57:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-11-21 13:57:59,145 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 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) [2022-11-21 13:58:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:00,298 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-11-21 13:58:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 13:58:00,300 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 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 19 [2022-11-21 13:58:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:00,302 INFO L225 Difference]: With dead ends: 75 [2022-11-21 13:58:00,302 INFO L226 Difference]: Without dead ends: 75 [2022-11-21 13:58:00,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 13:58:00,304 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 319 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:00,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 163 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 13:58:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-21 13:58:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 48. [2022-11-21 13:58:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 47 states have internal predecessors, (54), 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) [2022-11-21 13:58:00,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-21 13:58:00,310 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 19 [2022-11-21 13:58:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:00,310 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-21 13:58:00,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 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) [2022-11-21 13:58:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-21 13:58:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 13:58:00,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:00,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:00,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:58:00,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 13:58:00,520 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:58:00,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash 658274998, now seen corresponding path program 1 times [2022-11-21 13:58:00,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:00,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984560984] [2022-11-21 13:58:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:00,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:00,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984560984] [2022-11-21 13:58:00,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984560984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:00,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:00,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 13:58:00,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926621357] [2022-11-21 13:58:00,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:00,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:58:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:00,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:58:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:58:00,706 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-11-21 13:58:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:00,940 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2022-11-21 13:58:00,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:58:00,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 20 [2022-11-21 13:58:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:00,942 INFO L225 Difference]: With dead ends: 51 [2022-11-21 13:58:00,942 INFO L226 Difference]: Without dead ends: 34 [2022-11-21 13:58:00,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-21 13:58:00,943 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:00,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 77 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:58:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-21 13:58:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-11-21 13:58:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 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) [2022-11-21 13:58:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-11-21 13:58:00,946 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2022-11-21 13:58:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:00,946 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-11-21 13:58:00,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-11-21 13:58:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-11-21 13:58:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 13:58:00,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:00,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:00,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 13:58:00,948 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:58:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2067169221, now seen corresponding path program 1 times [2022-11-21 13:58:00,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:00,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53371784] [2022-11-21 13:58:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:00,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:01,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:01,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53371784] [2022-11-21 13:58:01,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53371784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:58:01,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040155708] [2022-11-21 13:58:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:01,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:58:01,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:58:01,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:58:01,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:58:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:01,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-21 13:58:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:58:01,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 13:58:01,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 13:58:01,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:58:02,476 INFO L321 Elim1Store]: treesize reduction 3, result has 90.9 percent of original size [2022-11-21 13:58:02,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 43 [2022-11-21 13:58:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:02,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:58:03,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-21 13:58:03,361 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_192 (Array Int Int)) (|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_15| Int) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_192))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (= .cse0 0) (not (= (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_15|) .cse0)) (<= 1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_15|) (< (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_15| 1) (+ |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))))) is different from false [2022-11-21 13:58:03,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:58:03,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2022-11-21 13:58:03,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:58:03,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 106 [2022-11-21 13:58:03,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:58:03,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-11-21 13:58:03,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 13:58:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:03,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040155708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:58:03,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:58:03,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 33 [2022-11-21 13:58:03,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020878323] [2022-11-21 13:58:03,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:58:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 13:58:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 13:58:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=901, Unknown=1, NotChecked=62, Total=1122 [2022-11-21 13:58:03,906 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 34 states have internal predecessors, (58), 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) [2022-11-21 13:58:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:05,962 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2022-11-21 13:58:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 13:58:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 34 states have internal predecessors, (58), 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 22 [2022-11-21 13:58:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:05,964 INFO L225 Difference]: With dead ends: 72 [2022-11-21 13:58:05,964 INFO L226 Difference]: Without dead ends: 72 [2022-11-21 13:58:05,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=494, Invalid=1861, Unknown=1, NotChecked=94, Total=2450 [2022-11-21 13:58:05,965 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 223 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:05,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 179 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 363 Invalid, 0 Unknown, 38 Unchecked, 0.7s Time] [2022-11-21 13:58:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-21 13:58:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 51. [2022-11-21 13:58:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 50 states have internal predecessors, (56), 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) [2022-11-21 13:58:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-11-21 13:58:05,968 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 22 [2022-11-21 13:58:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:05,969 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-11-21 13:58:05,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 34 states have internal predecessors, (58), 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) [2022-11-21 13:58:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-11-21 13:58:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 13:58:05,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:05,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:05,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:58:06,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:58:06,181 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:58:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:06,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1423532355, now seen corresponding path program 2 times [2022-11-21 13:58:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:06,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435000810] [2022-11-21 13:58:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:06,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:06,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:06,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435000810] [2022-11-21 13:58:06,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435000810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:58:06,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046018384] [2022-11-21 13:58:06,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:58:06,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:58:06,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:58:06,790 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:58:06,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:58:06,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:58:06,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:58:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 13:58:06,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:58:06,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 13:58:07,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:58:07,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-21 13:58:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:07,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:58:07,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-11-21 13:58:07,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 13:58:07,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-21 13:58:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:07,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046018384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:58:07,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:58:07,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-21 13:58:07,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984634049] [2022-11-21 13:58:07,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:58:07,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:58:07,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:58:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:58:07,800 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 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) [2022-11-21 13:58:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:08,835 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-11-21 13:58:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 13:58:08,836 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 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 25 [2022-11-21 13:58:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:08,837 INFO L225 Difference]: With dead ends: 80 [2022-11-21 13:58:08,837 INFO L226 Difference]: Without dead ends: 80 [2022-11-21 13:58:08,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 13:58:08,839 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:08,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 127 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:58:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-21 13:58:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2022-11-21 13:58:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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) [2022-11-21 13:58:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-11-21 13:58:08,842 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2022-11-21 13:58:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:08,842 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-11-21 13:58:08,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 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) [2022-11-21 13:58:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-11-21 13:58:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 13:58:08,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:08,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:08,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:58:09,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:58:09,051 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 13:58:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:09,052 INFO L85 PathProgramCache]: Analyzing trace with hash -587507249, now seen corresponding path program 2 times [2022-11-21 13:58:09,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:09,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761961924] [2022-11-21 13:58:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:09,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761961924] [2022-11-21 13:58:10,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761961924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:58:10,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054203357] [2022-11-21 13:58:10,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:58:10,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:58:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:58:10,331 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:58:10,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:58:10,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:58:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:58:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-21 13:58:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:58:10,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 13:58:10,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 13:58:10,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:58:12,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:58:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:58:13,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:58:13,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-11-21 13:58:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:13,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:58:15,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2022-11-21 13:58:16,302 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrspn_~sc1~0#1.offset| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_20| Int) (|v_ULTIMATE.start_cstrspn_#in~s2#1.offset_5| Int) (v_ArrVal_235 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_235) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_235 |v_ULTIMATE.start_cstrspn_#in~s2#1.offset_5|))) (or (<= 1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_20|) (not (<= 0 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_20|)) (not (= (select .cse0 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_20|) .cse1)) (not (= (select .cse0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) .cse1)) (= 0 .cse1) (not (<= (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_20| 1) |ULTIMATE.start_cstrspn_~sc1~0#1.offset|))))) is different from false [2022-11-21 13:58:16,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:58:16,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 35 [2022-11-21 13:58:16,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 13:58:16,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:58:16,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 69 [2022-11-21 13:58:16,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 13:58:16,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:58:16,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 56 [2022-11-21 13:58:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:16,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054203357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:58:16,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:58:16,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 22] total 58 [2022-11-21 13:58:16,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877758316] [2022-11-21 13:58:16,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:58:16,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-21 13:58:16,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:16,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-21 13:58:16,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2959, Unknown=1, NotChecked=112, Total=3422 [2022-11-21 13:58:16,563 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 59 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 59 states have internal predecessors, (95), 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) [2022-11-21 13:58:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:25,271 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2022-11-21 13:58:25,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-21 13:58:25,272 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 59 states have internal predecessors, (95), 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 35 [2022-11-21 13:58:25,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:25,272 INFO L225 Difference]: With dead ends: 122 [2022-11-21 13:58:25,272 INFO L226 Difference]: Without dead ends: 0 [2022-11-21 13:58:25,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=2909, Invalid=10666, Unknown=1, NotChecked=230, Total=13806 [2022-11-21 13:58:25,278 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 623 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:25,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 256 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 894 Invalid, 0 Unknown, 93 Unchecked, 1.5s Time] [2022-11-21 13:58:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-21 13:58:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-21 13:58:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-21 13:58:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-21 13:58:25,280 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-11-21 13:58:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:25,280 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-21 13:58:25,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 59 states have internal predecessors, (95), 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) [2022-11-21 13:58:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-21 13:58:25,281 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-21 13:58:25,284 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2022-11-21 13:58:25,284 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2022-11-21 13:58:25,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2022-11-21 13:58:25,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2022-11-21 13:58:25,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2022-11-21 13:58:25,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2022-11-21 13:58:25,286 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2022-11-21 13:58:25,286 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2022-11-21 13:58:25,286 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2022-11-21 13:58:25,286 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2022-11-21 13:58:25,286 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2022-11-21 13:58:25,287 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2022-11-21 13:58:25,287 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2022-11-21 13:58:25,287 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2022-11-21 13:58:25,287 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2022-11-21 13:58:25,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 13:58:25,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-21 13:58:25,498 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:25,502 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 13:58:25,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:58:25 BoogieIcfgContainer [2022-11-21 13:58:25,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 13:58:25,506 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 13:58:25,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 13:58:25,507 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 13:58:25,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:50" (3/4) ... [2022-11-21 13:58:25,512 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-21 13:58:25,527 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-11-21 13:58:25,528 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-21 13:58:25,528 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-21 13:58:25,528 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-21 13:58:25,588 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 13:58:25,588 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 13:58:25,589 INFO L158 Benchmark]: Toolchain (without parser) took 36633.29ms. Allocated memory was 169.9MB in the beginning and 358.6MB in the end (delta: 188.7MB). Free memory was 124.2MB in the beginning and 323.9MB in the end (delta: -199.7MB). Peak memory consumption was 200.8MB. Max. memory is 16.1GB. [2022-11-21 13:58:25,589 INFO L158 Benchmark]: CDTParser took 2.41ms. Allocated memory is still 134.2MB. Free memory is still 77.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:58:25,590 INFO L158 Benchmark]: CACSL2BoogieTranslator took 668.55ms. Allocated memory is still 169.9MB. Free memory was 123.8MB in the beginning and 106.6MB in the end (delta: 17.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-21 13:58:25,590 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.20ms. Allocated memory is still 169.9MB. Free memory was 106.2MB in the beginning and 104.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 13:58:25,592 INFO L158 Benchmark]: Boogie Preprocessor took 52.89ms. Allocated memory is still 169.9MB. Free memory was 104.1MB in the beginning and 102.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:58:25,592 INFO L158 Benchmark]: RCFGBuilder took 660.25ms. Allocated memory is still 169.9MB. Free memory was 102.4MB in the beginning and 134.0MB in the end (delta: -31.6MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2022-11-21 13:58:25,593 INFO L158 Benchmark]: TraceAbstraction took 35059.11ms. Allocated memory was 169.9MB in the beginning and 358.6MB in the end (delta: 188.7MB). Free memory was 133.0MB in the beginning and 118.3MB in the end (delta: 14.8MB). Peak memory consumption was 203.6MB. Max. memory is 16.1GB. [2022-11-21 13:58:25,593 INFO L158 Benchmark]: Witness Printer took 81.71ms. Allocated memory is still 358.6MB. Free memory was 118.3MB in the beginning and 323.9MB in the end (delta: -205.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-21 13:58:25,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.41ms. Allocated memory is still 134.2MB. Free memory is still 77.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 668.55ms. Allocated memory is still 169.9MB. Free memory was 123.8MB in the beginning and 106.6MB in the end (delta: 17.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.20ms. Allocated memory is still 169.9MB. Free memory was 106.2MB in the beginning and 104.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.89ms. Allocated memory is still 169.9MB. Free memory was 104.1MB in the beginning and 102.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 660.25ms. Allocated memory is still 169.9MB. Free memory was 102.4MB in the beginning and 134.0MB in the end (delta: -31.6MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * TraceAbstraction took 35059.11ms. Allocated memory was 169.9MB in the beginning and 358.6MB in the end (delta: 188.7MB). Free memory was 133.0MB in the beginning and 118.3MB in the end (delta: 14.8MB). Peak memory consumption was 203.6MB. Max. memory is 16.1GB. * Witness Printer took 81.71ms. Allocated memory is still 358.6MB. Free memory was 118.3MB in the beginning and 323.9MB in the end (delta: -205.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 379]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 15 error locations. Started 1 CEGAR loops. OverallTime: 35.0s, OverallIterations: 21, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2109 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2109 mSDsluCounter, 1804 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 131 IncrementalHoareTripleChecker+Unchecked, 1320 mSDsCounter, 155 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2535 IncrementalHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 155 mSolverCounterUnsat, 484 mSDtfsCounter, 2535 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 475 GetRequests, 130 SyntacticMatches, 16 SemanticMatches, 329 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 4023 ImplicationChecksByTransitivity, 17.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=19, InterpolantAutomatonStates: 208, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 232 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 17.1s InterpolantComputationTime, 414 NumberOfCodeBlocks, 414 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 485 ConstructedInterpolants, 73 QuantifiedInterpolants, 7010 SizeOfPredicates, 86 NumberOfNonLiveVariables, 745 ConjunctsInSsa, 215 ConjunctsInUnsatCore, 30 InterpolantComputations, 17 PerfectInterpolantSequences, 7/80 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-21 13:58:25,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a4fd20-f38c-4d0d-b463-8504ccf07d2a/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE